{"id":25322,"date":"2026-08-01T03:22:05","date_gmt":"2026-07-31T18:22:05","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=25322"},"modified":"2026-08-01T03:22:05","modified_gmt":"2026-07-31T18:22:05","slug":"cc-c-sizeof-operator","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-c-sizeof-operator\/","title":{"rendered":"\u30102026\u5e748\u6708\u6700\u65b0\u3011C\u8a00\u8a9esizeof\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u914d\u5217\u30fb\u69cb\u9020\u4f53\u30fb\u30dd\u30a4\u30f3\u30bf\u3067\u30cf\u30de\u308b\u7f60\u3068\u5bfe\u7b56"},"content":{"rendered":"\n<style>\n.g-flow-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;}\n.g-flow-item{background:linear-gradient(135deg,#1a1a1a,#2a1015);color:#fff;border-radius:8px;padding:16px 14px;min-width:130px;flex:1;text-align:center;}\n.g-flow-arrow{color:#dc2626;font-size:20px;font-weight:700;}\n.g-card-row{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 32px;}\n.g-card-row>div{flex:1;min-width:220px;}\n@media(max-width:600px){\n  .g-flow-row{flex-direction:column;}\n  .g-flow-arrow{transform:rotate(90deg);}\n  .g-card-row{flex-direction:column;}\n  .g-card-row>div{min-width:100%;}\n}\n<\/style>\n\n\n\n<div style=\"margin:0 0 32px;\">\n  <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/08\/thumb-cc-c-sizeof-operator.jpg\" alt=\"\u30102026\u5e748\u6708\u6700\u65b0\u3011C\u8a00\u8a9esizeof\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u914d\u5217\u30fb\u69cb\u9020\u4f53\u30fb\u30dd\u30a4\u30f3\u30bf\u3067\u30cf\u30de\u308b\u7f60\u3068\u5bfe\u7b56\" style=\"width:100%;height:auto;border-radius:12px;display:block;\">\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-radius:12px;padding:24px 28px;margin:0 0 32px;border-left:4px solid #dc2626;\">\n  <p style=\"font-size:15px;font-weight:700;color:#1a1a1a;margin:0 0 16px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9<\/p>\n  <ol style=\"margin:0;padding-left:20px;font-size:14px;line-height:2.2;list-style:none;\">\n    <li><a href=\"#sec-01\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">01<\/span>sizeof\u6f14\u7b97\u5b50\u3068\u306f\u4f55\u304b\uff08\u57fa\u790e\u77e5\u8b58\uff09<\/a><\/li>\n    <li><a href=\"#sec-02\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">02<\/span>\u914d\u5217\u3068sizeof\uff1a\u8981\u7d20\u6570\u306e\u8a08\u7b97\u65b9\u6cd5<\/a><\/li>\n    <li><a href=\"#sec-03\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">03<\/span>\u69cb\u9020\u4f53\u3068sizeof\uff1a\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u30fb\u30d1\u30c7\u30a3\u30f3\u30b0\u306e\u7f60<\/a><\/li>\n    <li><a href=\"#sec-04\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">04<\/span>\u95a2\u6570\u306b\u914d\u5217\u3092\u6e21\u3059\u3068\u304d\u306e\u7f60\uff08\u30dd\u30a4\u30f3\u30bf\u3078\u306edecay\uff09<\/a><\/li>\n    <li><a href=\"#sec-05\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">05<\/span>\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba\u3068\u8a55\u4fa1\u30bf\u30a4\u30df\u30f3\u30b0<\/a><\/li>\n    <li><a href=\"#sec-06\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">06<\/span>\u5b9f\u52d9\u3067\u3042\u308a\u304c\u3061\u306a\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3\u3068\u9632\u6b62\u7b56<\/a><\/li>\n    <li><a href=\"#sec-07\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">07<\/span>\u3010\u72ec\u81ea\u30c7\u30fc\u30bf\u3011GENAI\u793e\u5185\u306eAI\u30b3\u30fc\u30c9\u54c1\u8cea\u30c1\u30a7\u30c3\u30af\u5b9f\u904b\u7528<\/a><\/li>\n    <li><a href=\"#sec-08\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">08<\/span>\u3010\u72ec\u81ea\u3011\u4ed5\u69d8\u306e\u7d30\u90e8\u3092\u6697\u8a18\u3057\u306a\u304f\u3066\u3044\u3044\u6642\u4ee3\u306e\u7d4c\u55b6\u30a4\u30f3\u30d1\u30af\u30c8<\/a><\/li>\n    <li><a href=\"#sec-09\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">09<\/span>\u307e\u3068\u3081<\/a><\/li>\n    <li><a href=\"#faq\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">FAQ<\/span>\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><\/li>\n  <\/ol>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u308d\u3046\u3068sizeof\u3092\u4f7f\u3063\u305f\u306e\u306b\u3001\u95a2\u6570\u306e\u4e2d\u306b\u5165\u308c\u305f\u77ac\u9593\u306b\u5024\u304c\u304a\u304b\u3057\u304f\u306a\u308b\u300d\u2014\u2014C\u8a00\u8a9e\u3092\u66f8\u3044\u305f\u3053\u3068\u304c\u3042\u308b\u4eba\u306a\u3089\u3001\u4e00\u5ea6\u306f\u3053\u306e\u7f60\u306b\u30cf\u30de\u3063\u305f\u7d4c\u9a13\u304c\u3042\u308b\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>sizeof\u6f14\u7b97\u5b50<\/strong>\u306f\u3001C\u8a00\u8a9e\u306e\u4e2d\u3067\u3082\u6700\u3082\u57fa\u672c\u7684\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u6700\u3082\u8aa4\u89e3\u3055\u308c\u3084\u3059\u3044\u6a5f\u80fd\u306e\u3072\u3068\u3064\u3067\u3059\u3002\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b\u3001\u69cb\u9020\u4f53\u306e\u30e1\u30e2\u30ea\u30b5\u30a4\u30ba\u3092\u8abf\u3079\u308b\u3001\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba\u3092\u78ba\u8a8d\u3059\u308b\u2014\u2014\u7528\u9014\u306f\u30b7\u30f3\u30d7\u30eb\u306a\u306e\u306b\u3001\u300c\u914d\u5217\u304c\u30dd\u30a4\u30f3\u30bf\u306b\u5909\u308f\u308b\u300d\u300c\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u304c\u5358\u7d14\u306a\u5408\u8a08\u3068\u4e00\u81f4\u3057\u306a\u3044\u300d\u3068\u3044\u3063\u305f<strong>C\u8a00\u8a9e\u7279\u6709\u306e\u4ed5\u69d8<\/strong>\u304c\u7d61\u3080\u3068\u3001\u9014\u7aef\u306b\u6319\u52d5\u304c\u8aad\u3081\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001sizeof\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u3001\u914d\u5217\u30fb\u69cb\u9020\u4f53\u30fb\u30dd\u30a4\u30f3\u30bf\u305d\u308c\u305e\u308c\u3067\u8d77\u3053\u308a\u304c\u3061\u306a\u7f60\u3001\u5b9f\u52d9\u3067\u306e\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3\u3068\u9632\u6b62\u7b56\u307e\u3067\u3092\u3001\u6b63\u78ba\u306a\u6280\u8853\u60c5\u5831\u306b\u3082\u3068\u3065\u3044\u3066\u6574\u7406\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u5f8c\u534a\u3067\u306f\u3001\u3053\u3046\u3057\u305f<strong>\u7d30\u304b\u3044\u4ed5\u69d8\u3092\u4eba\u9593\u304c\u3059\u3079\u3066\u6697\u8a18\u3057\u3066\u3044\u306a\u304f\u3066\u3082\u3001AI\u304c\u6b63\u78ba\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u304f\u308c\u308b\u6642\u4ee3\u306b\u306a\u3063\u305f<\/strong>\u3053\u3068\u304c\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7d4c\u55b6\u8005\u306b\u3068\u3063\u3066\u4f55\u3092\u610f\u5473\u3059\u308b\u306e\u304b\u3082\u3042\u308f\u305b\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u6b63\u76f4\u306b\u8a00\u3046\u3068\u3001\u79c1\u81ea\u8eab\u306fC\u8a00\u8a9e\u306esizeof\u306e\u4ed5\u69d8\u3092\u5168\u90e8\u899a\u3048\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3001\u7d4c\u55b6\u8005\u3068\u3057\u3066\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3080\u4fa1\u5024\u306f\u3042\u308b\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u300c\u306a\u305c\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u614e\u91cd\u306b\u306a\u308b\u306e\u304b\u300d\u304c\u5206\u304b\u308b\u3068\u3001\u958b\u767a\u3092\u4f9d\u983c\u3059\u308b\u3068\u304d\u306e\u4f1a\u8a71\u306e\u8cea\u304c\u5909\u308f\u308b\u304b\u3089\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u4eca\u65e5\u306f\u6280\u8853\u7684\u306a\u6b63\u78ba\u6027\u3092\u6700\u512a\u5148\u306b\u3057\u3064\u3064\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u65b9\u3067\u3082\u300c\u4f55\u304c\u96e3\u3057\u3044\u30dd\u30a4\u30f3\u30c8\u306a\u306e\u304b\u300d\u306e\u8f2a\u90ed\u304c\u3064\u304b\u3081\u308b\u3088\u3046\u306b\u6574\u7406\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u6700\u5f8c\u307e\u3067\u8aad\u3080\u3068\u3001\u7d30\u90e8\u3092\u6697\u8a18\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u3063\u305f\u7406\u7531\u3082\u898b\u3048\u3066\u304f\u308b\u306f\u305a\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3092\u6700\u5f8c\u307e\u3067\u8aad\u3080\u3068\u3001\u6b21\u306e7\u3064\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>sizeof\u6f14\u7b97\u5b50<\/strong>\u306e\u57fa\u672c\u7684\u306a\u5f79\u5272\u3068\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u3055\u308c\u308b\u4ed5\u7d44\u307f<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u914d\u5217\u306e\u8981\u7d20\u6570<\/strong>\u3092sizeof\u3067\u6b63\u3057\u304f\u53d6\u5f97\u3059\u308b\u8a08\u7b97\u5f0f\u3068\u3001\u305d\u306e\u9650\u754c<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba<\/strong>\u304c\u30e1\u30f3\u30d0\u30fc\u306e\u5358\u7d14\u5408\u8a08\u3068\u4e00\u81f4\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u7406\u7531\uff08\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\/\u30d1\u30c7\u30a3\u30f3\u30b0\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u95a2\u6570\u306b\u914d\u5217\u3092\u6e21\u3059<\/strong>\u3068sizeof\u306e\u7d50\u679c\u304c\u5909\u308f\u3063\u3066\u3057\u307e\u3046\u300c\u30dd\u30a4\u30f3\u30bf\u3078\u306edecay\u300d\u3068\u3044\u3046\u73fe\u8c61<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba<\/strong>\u304c\u6307\u3059\u5148\u306e\u578b\u306b\u95a2\u4fc2\u306a\u304f\u4e00\u5b9a\u3067\u3042\u308b\u7406\u7531<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u5b9f\u52d9\u3067\u8d77\u3053\u308a\u304c\u3061\u306a<strong>sizeof\u95a2\u9023\u306e\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3<\/strong>\u3068\u9632\u6b62\u7b56<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>GENAI\u793e\u5185\u306e\u5b9f\u30c7\u30fc\u30bf<\/strong>\u3068\u3001\u3053\u3046\u3057\u305f\u77e5\u8b58\u3092\u7d4c\u55b6\u8005\u304c\u6697\u8a18\u3057\u306a\u304f\u3066\u3088\u3044\u6642\u4ee3\u306e\u610f\u5473<\/span><\/div>\n\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-01\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">01<\/span>\n  <span class=\"section-label\" style=\"display:block;\">BASICS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">sizeof\u6f14\u7b97\u5b50\u3068\u306f\u4f55\u304b\uff08\u57fa\u790e\u77e5\u8b58\uff09<\/span>\n  <span class=\"section-desc\">C\u8a00\u8a9e\u3067\u6700\u521d\u306b\u7fd2\u3046\u306e\u306b\u3001\u6700\u5f8c\u307e\u3067\u6b63\u78ba\u306b\u7406\u89e3\u3055\u308c\u306b\u304f\u3044\u6f14\u7b97\u5b50<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">sizeof\u306f<strong>\u95a2\u6570\u3067\u306f\u306a\u304f\u6f14\u7b97\u5b50<\/strong>\u3067\u3059\u3002\u30ab\u30c3\u30b3\u3092\u4ed8\u3051\u3066<code>sizeof(int)<\/code>\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u304c\u591a\u3044\u305f\u3081\u95a2\u6570\u3060\u3068\u8aa4\u89e3\u3055\u308c\u304c\u3061\u3067\u3059\u304c\u3001\u5b9f\u969b\u306b\u306f<code>+<\/code>\u3084<code>*<\/code>\u3068\u540c\u3058\u300c\u5358\u9805\u6f14\u7b97\u5b50\u300d\u306e\u4e00\u7a2e\u3067\u3059\u3002\u578b\u540d\u306b\u5bfe\u3057\u3066\u4f7f\u3046\u5834\u5408\u306f\u30ab\u30c3\u30b3\u304c\u5fc5\u9808\u3067\u3059\u304c\u3001\u5909\u6570\u3084\u5f0f\u306b\u5bfe\u3057\u3066\u4f7f\u3046\u5834\u5408\u306f\u30ab\u30c3\u30b3\u3092\u7701\u7565\u3067\u304d\u307e\u3059\uff08<code>sizeof x;<\/code>\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3082\u6587\u6cd5\u4e0a\u306f\u53ef\u80fd\u3067\u3059\uff09\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>sizeof\u6f14\u7b97\u5b50<\/strong>\uff1a\u578b\u3084\u5909\u6570\u3001\u5f0f\u304c\u5360\u3081\u308b\u30e1\u30e2\u30ea\u306e\u30b5\u30a4\u30ba\u3092\u300c\u30d0\u30a4\u30c8\u5358\u4f4d\u300d\u3067\u8fd4\u3059C\u8a00\u8a9e\u306e\u5358\u9805\u6f14\u7b97\u5b50\u3002\u623b\u308a\u5024\u306e\u578b\u306f\u7b26\u53f7\u306a\u3057\u6574\u6570\u578b\u306esize_t\u3002\u95a2\u6570\u306e\u3088\u3046\u306b\u898b\u3048\u308b\u304c\u3001\u5b9f\u4f53\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u51e6\u7406\u3059\u308b\u6f14\u7b97\u5b50\u3067\u3042\u308a\u3001\u591a\u304f\u306e\u5834\u5408\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u7d50\u679c\u304c\u78ba\u5b9a\u3059\u308b\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">sizeof\u304c\u8fd4\u3059\u5024\u306e\u578b\u306f<strong>size_t<\/strong>\u3068\u3044\u3046\u7b26\u53f7\u306a\u3057\u6574\u6570\u578b\u3067\u3059\u3002size_t\u306e\u5b9f\u969b\u306e\u30d3\u30c3\u30c8\u5e45\u306f\u51e6\u7406\u7cfb\uff08\u30b3\u30f3\u30d1\u30a4\u30e9\u30fbOS\u30fbCPU\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\uff09\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u300132bit\u74b0\u5883\u3067\u306f32bit\u300164bit\u74b0\u5883\u3067\u306f64bit\u306b\u306a\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002printf\u3067size_t\u578b\u306e\u5024\u3092\u51fa\u529b\u3059\u308b\u969b\u306f\u3001\u66f8\u5f0f\u6307\u5b9a\u5b50\u3068\u3057\u3066<code>%zu<\/code>\u3092\u4f7f\u3046\u306e\u304c\u6a19\u6e96\u7684\u306a\u4f5c\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>size_t<\/strong>\uff1asizeof\u3084\u914d\u5217\u306e\u6dfb\u5b57\u306a\u3069\u300c\u8ca0\u306e\u5024\u3092\u53d6\u3089\u306a\u3044\u30b5\u30a4\u30ba\u30fb\u500b\u6570\u300d\u3092\u8868\u3059\u305f\u3081\u306b\u4f7f\u308f\u308c\u308b\u7b26\u53f7\u306a\u3057\u6574\u6570\u578b\u3002\u5b9f\u969b\u306e\u5e45\u306f\u51e6\u7406\u7cfb\u4f9d\u5b58\uff0832bit\u74b0\u5883\u306a\u30894\u30d0\u30a4\u30c8\u300164bit\u74b0\u5883\u306a\u30898\u30d0\u30a4\u30c8\u304c\u4e00\u822c\u7684\uff09\u3002\u8ca0\u306e\u6570\u3068\u6bd4\u8f03\u30fb\u6f14\u7b97\u3059\u308b\u3068\u7b26\u53f7\u306a\u3057\u6574\u6570\u3078\u306e\u6697\u9ed9\u5909\u63db\u3067\u610f\u56f3\u3057\u306a\u3044\u6319\u52d5\u306b\u306a\u308a\u3084\u3059\u3044\u305f\u3081\u6ce8\u610f\u304c\u5fc5\u8981\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">1-1. \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u3055\u308c\u308b\u3068\u3044\u3046\u6027\u8cea<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">sizeof\u306e\u5927\u304d\u306a\u7279\u5fb4\u306f\u3001\u591a\u304f\u306e\u5834\u5408<strong>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u3055\u308c\u308b<\/strong>\u70b9\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u524d\u306b\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u578b\u60c5\u5831\u304b\u3089\u7d50\u679c\u3092\u8a08\u7b97\u3057\u3066\u78ba\u5b9a\u3055\u305b\u307e\u3059\u3002\u3053\u308c\u306f\u5b9f\u884c\u6642\u306b\u30b3\u30b9\u30c8\u304c\u304b\u304b\u3089\u306a\u3044\u3068\u3044\u3046\u610f\u5473\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4e0a\u306e\u30e1\u30ea\u30c3\u30c8\u3067\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u4f8b\u5916\u304c\u3042\u308a\u307e\u3059\u3002C99\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f<strong>\u53ef\u5909\u9577\u914d\u5217\uff08VLA: Variable Length Array\uff09<\/strong>\u306b\u5bfe\u3057\u3066sizeof\u3092\u4f7f\u3046\u5834\u5408\u306f\u3001\u914d\u5217\u306e\u30b5\u30a4\u30ba\u304c\u5b9f\u884c\u6642\u306b\u306a\u3089\u306a\u3044\u3068\u5206\u304b\u3089\u306a\u3044\u305f\u3081\u3001<strong>\u5b9f\u884c\u6642\u306b\u8a55\u4fa1\u3055\u308c\u308b<\/strong>\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u300csizeof\u306f\u5fc5\u305a\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u6c7a\u307e\u308b\u300d\u3068\u65ad\u5b9a\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u3053\u306eVLA\u306e\u30b1\u30fc\u30b9\u3067\u8aa4\u308a\u306b\u306a\u308b\u70b9\u306f\u899a\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u8ff7\u3063\u305f\u3089\u5b9f\u88c5\u4f9d\u5b58\u3092\u7591\u3046<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">sizeof\u304c\u8fd4\u3059\u5177\u4f53\u7684\u306a\u6570\u5024\uff08int\u304c4\u30d0\u30a4\u30c8\u304b\u3069\u3046\u304b\u3001\u69cb\u9020\u4f53\u304c\u4f55\u30d0\u30a4\u30c8\u306b\u306a\u308b\u304b\u7b49\uff09\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u30fbOS\u30fbCPU\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u3088\u3063\u3066\u5909\u308f\u308a\u5f97\u308b\u300c\u5b9f\u88c5\u4f9d\u5b58\u300d\u306e\u5024\u3067\u3059\u3002\u300c\u5fc5\u305a\u3053\u3046\u306a\u308b\u300d\u3068\u3044\u3046\u65ad\u5b9a\u7684\u306a\u60c5\u5831\u3092\u898b\u304b\u3051\u305f\u3089\u3001\u307e\u305a\u624b\u5143\u306e\u74b0\u5883\u3067\u5b9f\u969b\u306b<code>sizeof(...)<\/code>\u3092\u51fa\u529b\u3057\u3066\u78ba\u8a8d\u3059\u308b\u7fd2\u6163\u3092\u3064\u3051\u308b\u3068\u4e8b\u6545\u3092\u9632\u3052\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"margin:20px 0;\">\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:18px 22px;border-radius:8px;overflow-x:auto;font-size:13px;line-height:1.8;\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    printf(\"sizeof(char)  = %zu\\n\", sizeof(char));\n    printf(\"sizeof(int)   = %zu\\n\", sizeof(int));\n    printf(\"sizeof(double)= %zu\\n\", sizeof(double));\n    return 0;\n}\n\/* \u51fa\u529b\u4f8b\uff08\u591a\u304f\u306e\u4e00\u822c\u7684\u306a\u74b0\u5883\uff09:\n   sizeof(char)  = 1\n   sizeof(int)   = 4\n   sizeof(double)= 8\n   \u203b \u5b9f\u969b\u306e\u5024\u306f\u51e6\u7406\u7cfb\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u5f97\u308b *\/\n<\/code><\/pre>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u3053\u3053\u3067\u5927\u4e8b\u306a\u306e\u306f\u300c4\u30d0\u30a4\u30c8\u306b\u306a\u308b\u306f\u305a\u300d\u3068\u6c7a\u3081\u6253\u3061\u3057\u306a\u3044\u3053\u3068\u3060\u305d\u3046\u3067\u3059\u3002\u3046\u3061\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u3082\u300c\u74b0\u5883\u4f9d\u5b58\u306e\u5024\u3092\u6c7a\u3081\u6253\u3061\u3057\u305f\u30b3\u30fc\u30c9\u306f\u3001\u5225\u306e\u30de\u30b7\u30f3\u3084\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u30d3\u30eb\u30c9\u3057\u305f\u77ac\u9593\u306b\u58ca\u308c\u308b\u300d\u3068\u3088\u304f\u8a00\u3063\u3066\u3044\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-02\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">02<\/span>\n  <span class=\"section-label\" style=\"display:block;\">ARRAYS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u914d\u5217\u3068sizeof\uff1a\u8981\u7d20\u6570\u306e\u8a08\u7b97\u65b9\u6cd5<\/span>\n  <span class=\"section-desc\">sizeof\u3092\u4f7f\u3063\u305f\u5b9a\u756a\u306e\u8981\u7d20\u6570\u53d6\u5f97\u30c6\u30af\u30cb\u30c3\u30af\u3068\u3001\u305d\u306e\u843d\u3068\u3057\u7a74<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u306b\u5bfe\u3057\u3066sizeof\u3092\u4f7f\u3046\u3068\u3001<strong>\u914d\u5217\u5168\u4f53\u304c\u5360\u3081\u308b\u30d0\u30a4\u30c8\u6570<\/strong>\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u8981\u7d20\u6570 \u00d7 1\u8981\u7d20\u3042\u305f\u308a\u306e\u30b5\u30a4\u30ba\u300d\u3067\u8a08\u7b97\u3055\u308c\u305f\u5024\u3067\u3059\u3002\u3053\u306e\u6027\u8cea\u3092\u5229\u7528\u3059\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306a\u5f0f\u3067\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"point-box\">\n  <div class=\"point-title\">\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u6c42\u3081\u308b\u5b9a\u756a\u306e\u5f0f<\/div>\n  <p><strong>\u8981\u7d20\u6570 = sizeof(\u914d\u5217\u5168\u4f53) \u00f7 sizeof(\u914d\u5217\u306e\u5148\u982d\u8981\u7d20)<\/strong><br>\u4f8b\uff1a<code>int arr[10]; size_t n = sizeof(arr) \/ sizeof(arr[0]);<\/code><\/p>\n<\/div>\n\n\n\n<div style=\"margin:20px 0;\">\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:18px 22px;border-radius:8px;overflow-x:auto;font-size:13px;line-height:1.8;\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int arr[10];\n    size_t total_bytes   = sizeof(arr);         \/* \u914d\u5217\u5168\u4f53\u306e\u30d0\u30a4\u30c8\u6570 *\/\n    size_t element_bytes  = sizeof(arr[0]);      \/* 1\u8981\u7d20\u5206\u306e\u30d0\u30a4\u30c8\u6570 *\/\n    size_t element_count  = total_bytes \/ element_bytes;\n\n    printf(\"total_bytes  = %zu\\n\", total_bytes);\n    printf(\"element_bytes = %zu\\n\", element_bytes);\n    printf(\"element_count = %zu\\n\", element_count); \/* 10 \u306b\u306a\u308b *\/\n    return 0;\n}\n<\/code><\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u914d\u5217\uff08\u306e\u8981\u7d20\u6570\uff09<\/strong>\uff1aC\u8a00\u8a9e\u306e\u914d\u5217\u306f\u300c\u540c\u3058\u578b\u306e\u30c7\u30fc\u30bf\u304c\u9023\u7d9a\u3057\u3066\u30e1\u30e2\u30ea\u306b\u4e26\u3093\u3060\u3082\u306e\u300d\u3002sizeof(\u914d\u5217)\u306f\u914d\u5217\u5168\u4f53\u306e\u30d0\u30a4\u30c8\u6570\u3092\u8fd4\u3059\u305f\u3081\u30011\u8981\u7d20\u3042\u305f\u308a\u306e\u30d0\u30a4\u30c8\u6570\u3067\u5272\u308b\u3053\u3068\u3067\u8981\u7d20\u6570\u3092\u9006\u7b97\u3067\u304d\u308b\u3002\u305f\u3060\u3057\u3053\u306e\u8a08\u7b97\u306f\u3001\u914d\u5217\u305d\u306e\u3082\u306e\u306e\u5b9f\u4f53\u304c\u898b\u3048\u3066\u3044\u308b\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u307f\u6b63\u3057\u304f\u52d5\u304f\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2-1. \u306a\u305c\u3053\u306e\u8a08\u7b97\u5f0f\u304c\u6210\u7acb\u3059\u308b\u306e\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u306f\u540c\u3058\u578b\u306e\u5024\u304c\u30e1\u30e2\u30ea\u4e0a\u306b\u9023\u7d9a\u3057\u3066\u4e26\u3093\u3060\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u300c\u914d\u5217\u5168\u4f53\u306e\u30d0\u30a4\u30c8\u6570\u300d\u306f\u300c1\u8981\u7d20\u306e\u30d0\u30a4\u30c8\u6570 \u00d7 \u8981\u7d20\u6570\u300d\u306b\u5fc5\u305a\u4e00\u81f4\u3057\u307e\u3059\u3002sizeof\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u914d\u5217\u306e\u578b\u60c5\u5831\uff08\u8981\u7d20\u306e\u578b\u3068\u500b\u6570\uff09\u3092\u628a\u63e1\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u3053\u306e\u8a08\u7b97\u304c\u6b63\u78ba\u306b\u884c\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u65b9\u6cd5\u306f<strong>\u914d\u5217\u305d\u306e\u3082\u306e\u304c\u5ba3\u8a00\u3055\u308c\u3066\u3044\u308b\u30b9\u30b3\u30fc\u30d7<\/strong>\u3067\u4f7f\u3046\u9650\u308a\u3001\u975e\u5e38\u306b\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u3002\u30eb\u30fc\u30d7\u51e6\u7406\u306e\u4e0a\u9650\u3092\u6c7a\u3081\u308b\u3068\u304d\u306a\u3069\u3001C\u8a00\u8a9e\u3067\u306f\u5b9a\u756a\u306e\u30a4\u30c7\u30a3\u30aa\u30e0\u3068\u3057\u3066\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u3053\u306e\u5f0f\u304c\u4f7f\u3048\u306a\u304f\u306a\u308b\u4ee3\u8868\u7684\u306a\u30b1\u30fc\u30b9<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u3053\u306e\u8a08\u7b97\u5f0f\u306f\u3001\u3042\u304f\u307e\u3067\u300c\u914d\u5217\u306e\u5b9f\u4f53\uff08int arr[10]\u306e\u3088\u3046\u306a\u5ba3\u8a00\uff09\u300d\u306b\u5bfe\u3057\u3066\u306e\u307f\u6b63\u3057\u304f\u52d5\u304d\u307e\u3059\u3002\u30dd\u30a4\u30f3\u30bf\u5909\u6570\u306b\u5bfe\u3057\u3066\u540c\u3058\u8a08\u7b97\u3092\u3059\u308b\u3068\u3001\u307e\u3063\u305f\u304f\u7570\u306a\u308b\uff08\u591a\u304f\u306e\u5834\u5408\u8aa4\u3063\u305f\uff09\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u7ae0\u3067\u6271\u3046\u300c\u95a2\u6570\u306b\u914d\u5217\u3092\u6e21\u3057\u305f\u3068\u304d\u300d\u304c\u305d\u306e\u5178\u578b\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2-2. \u591a\u6b21\u5143\u914d\u5217\u3067\u306esizeof<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u6b21\u5143\u914d\u5217\u3067\u3082sizeof\u306e\u8003\u3048\u65b9\u306f\u540c\u3058\u3067\u3059\u3002<code>int matrix[3][4];<\/code>\u306e\u3088\u3046\u306a2\u6b21\u5143\u914d\u5217\u3067\u3042\u308c\u3070\u3001<code>sizeof(matrix)<\/code>\u306f\u300c3\u00d74\u00d7sizeof(int)\u300d\u306b\u76f8\u5f53\u3059\u308b\u30d0\u30a4\u30c8\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002\u884c\u6570\u3092\u77e5\u308a\u305f\u3051\u308c\u3070<code>sizeof(matrix) \/ sizeof(matrix[0])<\/code>\u3001\u5217\u6570\u3092\u77e5\u308a\u305f\u3051\u308c\u3070<code>sizeof(matrix[0]) \/ sizeof(matrix[0][0])<\/code>\u3068\u3044\u3046\u5f62\u3067\u3001\u6b21\u5143\u3054\u3068\u306b\u5206\u89e3\u3057\u3066\u8a08\u7b97\u3057\u3066\u3044\u304f\u306e\u304c\u57fa\u672c\u306e\u8003\u3048\u65b9\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u914d\u5217\u306esizeof\u306f\u300c\u578b\u304c\u5206\u304b\u3063\u3066\u3044\u308b\u5b9f\u4f53\u306b\u5bfe\u3057\u3066\u4f7f\u3046\u300d\u306e\u304c\u5927\u524d\u63d0\u3067\u3059\u3002\u3053\u306e\u524d\u63d0\u3092\u5fd8\u308c\u308b\u3068\u3001\u6b21\u306e\u7ae0\u3067\u8aac\u660e\u3059\u308b\u300e\u95a2\u6570\u306b\u6e21\u3057\u305f\u77ac\u9593\u306b\u7d50\u679c\u304c\u5909\u308f\u308b\u300f\u3068\u3044\u3046\u6709\u540d\u306a\u7f60\u306b\u306f\u307e\u308a\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-03\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">03<\/span>\n  <span class=\"section-label\" style=\"display:block;\">STRUCTS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u69cb\u9020\u4f53\u3068sizeof\uff1a\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u30fb\u30d1\u30c7\u30a3\u30f3\u30b0\u306e\u7f60<\/span>\n  <span class=\"section-desc\">\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u304c\u300c\u30e1\u30f3\u30d0\u30fc\u306e\u5358\u7d14\u5408\u8a08\u300d\u3068\u4e00\u81f4\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u7406\u7531<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u69cb\u9020\u4f53\uff08struct\uff09\u306b\u5bfe\u3057\u3066sizeof\u3092\u4f7f\u3046\u3068\u3001\u305d\u306e\u30e1\u30f3\u30d0\u30fc\u5168\u4f53\u3092\u683c\u7d0d\u3059\u308b\u306e\u306b\u5fc5\u8981\u306a\u30d0\u30a4\u30c8\u6570\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u591a\u304f\u306e\u4eba\u304c\u3064\u307e\u305a\u304f\u306e\u304c\u3001<strong>\u300c\u30e1\u30f3\u30d0\u30fc\u306esizeof\u3092\u5358\u7d14\u306b\u8db3\u3057\u7b97\u3057\u305f\u5024\u300d\u3068\u3001\u69cb\u9020\u4f53\u5168\u4f53\u306esizeof\u304c\u4e00\u81f4\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308b<\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u69cb\u9020\u4f53\uff08struct\uff09<\/strong>\uff1a\u7570\u306a\u308b\u578b\u306e\u5909\u6570\uff08\u30e1\u30f3\u30d0\u30fc\uff09\u30921\u3064\u306b\u307e\u3068\u3081\u3066\u6271\u3046\u305f\u3081\u306eC\u8a00\u8a9e\u306e\u30c7\u30fc\u30bf\u578b\u3002\u4f8b\u3048\u3070\u300c\u540d\u524d\u30fb\u5e74\u9f62\u30fb\u30b9\u30b3\u30a2\u300d\u306e\u3088\u3046\u306b\u7570\u306a\u308b\u7a2e\u985e\u306e\u60c5\u5831\u3092\u3072\u3068\u307e\u3068\u307e\u308a\u306e\u30c7\u30fc\u30bf\u3068\u3057\u3066\u8868\u73fe\u3057\u305f\u3044\u3068\u304d\u306b\u4f7f\u3046\u3002\u69cb\u9020\u4f53\u5168\u4f53\u306e\u30b5\u30a4\u30ba\u306fsizeof(\u69cb\u9020\u4f53\u540d)\u3067\u53d6\u5f97\u3067\u304d\u308b\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3-1. \u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff08\u30e1\u30e2\u30ea\u6574\u5217\uff09\u3068\u30d1\u30c7\u30a3\u30f3\u30b0\u3068\u306f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u304f\u306eCPU\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306f\u3001\u7279\u5b9a\u306e\u578b\u306e\u30c7\u30fc\u30bf\u3092\u300c\u305d\u306e\u578b\u306e\u30b5\u30a4\u30ba\u306e\u500d\u6570\u3068\u306a\u308b\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u300d\u306b\u914d\u7f6e\u3057\u305f\u307b\u3046\u304c\u3001\u8aad\u307f\u66f8\u304d\u306e\u52b9\u7387\u304c\u826f\u304f\u306a\u308b\uff08\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u6574\u5217\u3057\u3066\u3044\u306a\u3044\u30a2\u30af\u30bb\u30b9\u304c\u30a8\u30e9\u30fc\u306b\u306a\u308b\u74b0\u5883\u3059\u3089\u3042\u308b\uff09\u3068\u3044\u3046\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u300c\u578b\u3054\u3068\u306b\u6c7a\u3081\u3089\u308c\u305f\u914d\u7f6e\u30eb\u30fc\u30eb\u300d\u306e\u3053\u3068\u3092<strong>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff08\u30e1\u30e2\u30ea\u6574\u5217\uff09<\/strong>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001\u69cb\u9020\u4f53\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u3053\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u30eb\u30fc\u30eb\u306b\u6cbf\u3063\u3066\u914d\u7f6e\u3057\u3088\u3046\u3068\u3057\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u30e1\u30f3\u30d0\u30fc\u3068\u30e1\u30f3\u30d0\u30fc\u306e\u9593\u306b\u300c\u4f7f\u308f\u308c\u306a\u3044\u9699\u9593\u300d\u304c\u633f\u5165\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u9699\u9593\u306e\u3053\u3068\u3092<strong>\u30d1\u30c7\u30a3\u30f3\u30b0<\/strong>\u3068\u547c\u3073\u307e\u3059\u3002\u30d1\u30c7\u30a3\u30f3\u30b0\u304c\u5165\u308b\u3068\u3001\u69cb\u9020\u4f53\u5168\u4f53\u306e\u30b5\u30a4\u30ba\u306f\u5404\u30e1\u30f3\u30d0\u30fc\u306esizeof\u3092\u5358\u7d14\u306b\u8db3\u3057\u5408\u308f\u305b\u305f\u5024\u3088\u308a\u5927\u304d\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\/\u30d1\u30c7\u30a3\u30f3\u30b0<\/strong>\uff1a\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306f\u300c\u578b\u3054\u3068\u306b\u5b9a\u3081\u3089\u308c\u305f\u30e1\u30e2\u30ea\u914d\u7f6e\u306e\u6574\u5217\u30eb\u30fc\u30eb\u300d\u3002\u30d1\u30c7\u30a3\u30f3\u30b0\u306f\u3001\u305d\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u30e1\u30f3\u30d0\u30fc\u9593\u3084\u69cb\u9020\u4f53\u672b\u5c3e\u306b\u633f\u5165\u3059\u308b\u300c\u4f7f\u308f\u308c\u306a\u3044\u8a70\u3081\u7269\u306e\u30d0\u30a4\u30c8\u300d\u3002\u3053\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u3001\u69cb\u9020\u4f53\u5168\u4f53\u306e\u30b5\u30a4\u30ba\u306f\u5404\u30e1\u30f3\u30d0\u30fc\u306e\u30b5\u30a4\u30ba\u306e\u5358\u7d14\u5408\u8a08\u3068\u4e00\u81f4\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u3002<\/p>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3068\u3048\u3070\u300c1\u30d0\u30a4\u30c8\u306echar\u300d\u306e\u76f4\u5f8c\u306b\u300c4\u30d0\u30a4\u30c8\u306eint\u300d\u3092\u4e26\u3079\u305f\u69cb\u9020\u4f53\u3092\u8003\u3048\u308b\u3068\u3001int\u30924\u30d0\u30a4\u30c8\u5883\u754c\u306b\u914d\u7f6e\u3059\u308b\u305f\u3081\u306b\u3001char\u76f4\u5f8c\u306b\u6570\u30d0\u30a4\u30c8\u306e\u30d1\u30c7\u30a3\u30f3\u30b0\u304c\u633f\u5165\u3055\u308c\u308b\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057<strong>\u5177\u4f53\u7684\u306b\u4f55\u30d0\u30a4\u30c8\u306e\u30d1\u30c7\u30a3\u30f3\u30b0\u304c\u5165\u308b\u304b\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u30fb\u30bf\u30fc\u30b2\u30c3\u30c8CPU\u30fb\u6700\u9069\u5316\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u5909\u308f\u308b\u5b9f\u88c5\u4f9d\u5b58\u306e\u6319\u52d5<\/strong>\u3067\u3042\u308a\u3001\u300c\u5fc5\u305a\u3053\u3046\u306a\u308b\u300d\u3068\u65ad\u5b9a\u3067\u304d\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6c17\u306b\u306a\u308b\u5834\u5408\u306f\u3001\u624b\u5143\u306e\u74b0\u5883\u3067\u5b9f\u969b\u306b<code>sizeof(\u69cb\u9020\u4f53\u540d)<\/code>\u3092\u51fa\u529b\u3057\u3066\u78ba\u8a8d\u3059\u308b\u306e\u304c\u78ba\u5b9f\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u69cb\u9020\u4f53\u30b5\u30a4\u30ba\u3092\u6c7a\u3081\u6253\u3061\u3057\u306a\u3044<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u3084\u30e1\u30f3\u30d0\u30fc\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\uff08\u69cb\u9020\u4f53\u5185\u3067\u306e\u4f4d\u7f6e\uff09\u306f\u74b0\u5883\u4f9d\u5b58\u3067\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u4fdd\u5b58\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u3067\u69cb\u9020\u4f53\u3092\u305d\u306e\u307e\u307e\u30d0\u30a4\u30c8\u5217\u3068\u3057\u3066\u9001\u53d7\u4fe1\u3059\u308b\u8a2d\u8a08\u306f\u3001\u9001\u4fe1\u5074\u3068\u53d7\u4fe1\u5074\u3067\u30b3\u30f3\u30d1\u30a4\u30e9\u3084CPU\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u7570\u306a\u308b\u3068\u58ca\u308c\u308b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002\u5916\u90e8\u3068\u30c7\u30fc\u30bf\u3092\u3084\u308a\u53d6\u308a\u3059\u308b\u5834\u5408\u306f\u3001\u6c7a\u3081\u6253\u3061\u305b\u305a\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u51e6\u7406\u3092\u660e\u793a\u7684\u306b\u66f8\u304f\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3-2. \u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u6291\u3048\u308b\u65b9\u6cd5\u3068\u305d\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u3063\u3066\u306f<code>#pragma pack<\/code>\u3084\u3001GCC\/Clang\u306e<code>__attribute__((packed))<\/code>\u3068\u3044\u3063\u305f\u62e1\u5f35\u6a5f\u80fd\u3067\u3001\u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u8a70\u3081\u3066\u69cb\u9020\u4f53\u3092\u5c0f\u3055\u304f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3053\u308c\u3089\u306f<strong>\u6a19\u6e96C\u8a00\u8a9e\u306e\u6a5f\u80fd\u3067\u306f\u306a\u304f\u30b3\u30f3\u30d1\u30a4\u30e9\u62e1\u5f35<\/strong>\u3067\u3042\u308a\u3001\u79fb\u690d\u6027\u304c\u4e0b\u304c\u3063\u305f\u308a\u3001\u6574\u5217\u3055\u308c\u3066\u3044\u306a\u3044\u30e1\u30e2\u30ea\u30a2\u30af\u30bb\u30b9\u306b\u3088\u308b\u901f\u5ea6\u4f4e\u4e0b\u30fb\u4e00\u90e8\u74b0\u5883\u3067\u306e\u30a8\u30e9\u30fc\u3092\u62db\u3044\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5b89\u6613\u306b\u4f7f\u3046\u524d\u306b\u3001\u672c\u5f53\u306b\u30b5\u30a4\u30ba\u6700\u5c0f\u5316\u304c\u5fc5\u8981\u306a\u5834\u9762\u304b\u3069\u3046\u304b\u3092\u898b\u6975\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u30e1\u30f3\u30d0\u30fc\u306e\u4e26\u3073\u9806\u3067\u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u6e1b\u3089\u305b\u308b\u3053\u3068\u304c\u3042\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u69cb\u9020\u4f53\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u300c\u30b5\u30a4\u30ba\u306e\u5927\u304d\u3044\u578b\u304b\u3089\u5c0f\u3055\u3044\u578b\u306e\u9806\u300d\u306b\u4e26\u3079\u66ff\u3048\u308b\u3068\u3001\u30d1\u30c7\u30a3\u30f3\u30b0\u304c\u6e1b\u3063\u3066\u30b5\u30a4\u30ba\u304c\u5c0f\u3055\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u62e1\u5f35\u306b\u983c\u3089\u305a\u3001\u6a19\u6e96\u7684\u306a\u66f8\u304d\u65b9\u3060\u3051\u3067\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u6539\u5584\u3067\u304d\u308b\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u6b63\u76f4\u300c\u30d1\u30c7\u30a3\u30f3\u30b0\u300d\u3068\u3044\u3046\u8a00\u8449\u3092\u521d\u3081\u3066\u805e\u3044\u305f\u3068\u304d\u3001\u610f\u5473\u304c\u5206\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u305f\u3060\u300c\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u306f\u5358\u7d14\u306a\u8db3\u3057\u7b97\u306b\u306a\u3089\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u300d\u3068\u3044\u3046\u4e00\u70b9\u3060\u3051\u899a\u3048\u3066\u304a\u3051\u3070\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3068\u306e\u4f1a\u8a71\u3067\u7f6e\u3044\u3066\u3044\u304b\u308c\u305a\u306b\u6e08\u307f\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-04\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">04<\/span>\n  <span class=\"section-label\" style=\"display:block;\">FUNCTION ARGS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u95a2\u6570\u306b\u914d\u5217\u3092\u6e21\u3059\u3068\u304d\u306e\u7f60\uff08\u30dd\u30a4\u30f3\u30bf\u3078\u306edecay\uff09<\/span>\n  <span class=\"section-desc\">C\u8a00\u8a9e\u3067\u6700\u3082\u6709\u540d\u306a\u521d\u5fc3\u8005\u306e\u843d\u3068\u3057\u7a74\u306e\u3072\u3068\u3064<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u304csizeof\u306b\u95a2\u3059\u308b\u6700\u3082\u6709\u540d\u306a\u7f60\u3067\u3059\u3002C\u8a00\u8a9e\u3067\u306f\u3001\u914d\u5217\u3092\u95a2\u6570\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u3068\u3001\u305d\u306e\u914d\u5217\u306f<strong>\u300c\u914d\u5217\u306e\u5148\u982d\u8981\u7d20\u3092\u6307\u3059\u30dd\u30a4\u30f3\u30bf\u300d\u306b\u5909\u63db\uff08decay\uff09<\/strong>\u3055\u308c\u307e\u3059\u3002\u95a2\u6570\u306e\u5185\u90e8\u3067\u306f\u3001\u53d7\u3051\u53d6\u3063\u305f\u5f15\u6570\u306f\u3082\u3046\u300c\u914d\u5217\u300d\u3067\u306f\u306a\u304f\u300c\u30dd\u30a4\u30f3\u30bf\u300d\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u305f\u3081\u3001\u305d\u306e\u4e2d\u3067sizeof\u3092\u4f7f\u3046\u3068\u3001<strong>\u914d\u5217\u5168\u4f53\u306e\u30b5\u30a4\u30ba\u3067\u306f\u306a\u304f\u3001\u30dd\u30a4\u30f3\u30bf\u81ea\u4f53\u306e\u30b5\u30a4\u30ba<\/strong>\u304c\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"margin:20px 0;\">\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:18px 22px;border-radius:8px;overflow-x:auto;font-size:13px;line-height:1.8;\"><code>#include &lt;stdio.h&gt;\n\nvoid check_size(int arr[]) {\n    \/* \u3053\u3053\u3067\u306e arr \u306f\u5b9f\u969b\u306b\u306f\u30dd\u30a4\u30f3\u30bf (int*) \u3068\u3057\u3066\u6271\u308f\u308c\u308b *\/\n    printf(\"\u95a2\u6570\u5185: sizeof(arr) = %zu\\n\", sizeof(arr));\n}\n\nint main(void) {\n    int numbers[10];\n    printf(\"\u547c\u3073\u51fa\u3057\u5143: sizeof(numbers) = %zu\\n\", sizeof(numbers));\n    check_size(numbers);\n    return 0;\n}\n\/* \u51fa\u529b\u4f8b\uff0864bit\u74b0\u5883\u306e\u5834\u5408\uff09:\n   \u547c\u3073\u51fa\u3057\u5143: sizeof(numbers) = 40   (10\u8981\u7d20 \u00d7 4\u30d0\u30a4\u30c8)\n   \u95a2\u6570\u5185:     sizeof(arr)     = 8    (\u30dd\u30a4\u30f3\u30bf\u81ea\u4f53\u306e\u30b5\u30a4\u30ba)\n   \u203b \u5177\u4f53\u7684\u306a\u6570\u5024\u306f\u74b0\u5883\u306b\u3088\u308a\u7570\u306a\u308b\u304c\u3001\n     \u300c\u547c\u3073\u51fa\u3057\u5143\u3068\u95a2\u6570\u5185\u3067\u5024\u304c\u5909\u308f\u308b\u300d\u3068\u3044\u3046\u73fe\u8c61\u81ea\u4f53\u306f\n     C\u8a00\u8a9e\u306e\u4ed5\u69d8\u3068\u3057\u3066\u4e00\u8cab\u3057\u3066\u767a\u751f\u3059\u308b *\/\n<\/code><\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30dd\u30a4\u30f3\u30bf<\/strong>\uff1a\u30e1\u30e2\u30ea\u4e0a\u306e\u30a2\u30c9\u30ec\u30b9\uff08\u5834\u6240\uff09\u3092\u5024\u3068\u3057\u3066\u6301\u3064\u5909\u6570\u3002\u300c\u914d\u5217\u306e\u5148\u982d\u8981\u7d20\u3092\u6307\u3059\u30dd\u30a4\u30f3\u30bf\u300d\u3092\u7d4c\u7531\u3059\u308b\u3053\u3068\u3067\u3001\u914d\u5217\u306e\u4e2d\u8eab\u306b\u9593\u63a5\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3002\u95a2\u6570\u306b\u914d\u5217\u3092\u6e21\u3059\u3068\u3001\u305d\u306e\u914d\u5217\u306f\u81ea\u52d5\u7684\u306b\u5148\u982d\u8981\u7d20\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u306b\u5909\u63db\u3055\u308c\u308b\uff08\u914d\u5217\u306e\u30dd\u30a4\u30f3\u30bf\u3078\u306edecay\uff09\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4-1. \u306a\u305c\u3053\u306e\u4ed5\u69d8\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u8a00\u8a9e\u306e\u8a2d\u8a08\u4e0a\u3001\u914d\u5217\u3092\u95a2\u6570\u306e\u5f15\u6570\u3068\u3057\u3066\u5024\u6e21\u3057\u3067\u307e\u308b\u3054\u3068\u30b3\u30d4\u30fc\u3059\u308b\u4ed5\u7d44\u307f\u306f\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u4ee3\u308f\u308a\u306b\u3001\u914d\u5217\u540d\u3092\u6e21\u3059\u3068\u81ea\u52d5\u7684\u306b\u5148\u982d\u8981\u7d20\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3078\u3068\u5909\u63db\u3055\u308c\u308b\u3001\u3068\u3044\u3046\u898f\u5247\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u52b9\u7387\u9762\u3067\u306e\u5408\u7406\u7684\u306a\u8a2d\u8a08\u5224\u65ad\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u7d50\u679c\u3068\u3057\u3066\u300c\u914d\u5217\u306e\u3064\u3082\u308a\u3067\u6e21\u3057\u305f\u5f15\u6570\u304c\u3001\u95a2\u6570\u306e\u4e2d\u3067\u306f\u30dd\u30a4\u30f3\u30bf\u306b\u306a\u3063\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u521d\u5fc3\u8005\u306b\u3068\u3063\u3066\u76f4\u611f\u306b\u53cd\u3059\u308b\u6319\u52d5\u3092\u751f\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed5\u69d8\u3092\u77e5\u3089\u305a\u306b\u300c\u95a2\u6570\u306e\u5f15\u6570\u3067sizeof\u3092\u4f7f\u3048\u3070\u5143\u306e\u914d\u5217\u30b5\u30a4\u30ba\u304c\u53d6\u308c\u308b\u306f\u305a\u300d\u3068\u601d\u3044\u8fbc\u3093\u3067\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3068\u3001\u610f\u56f3\u3057\u306a\u3044\u30d0\u30a4\u30c8\u6570\uff08\u591a\u304f\u306e\u5834\u54084\u30d0\u30a4\u30c8\u30848\u30d0\u30a4\u30c8\u3068\u3044\u3063\u305f\u30dd\u30a4\u30f3\u30bf\u81ea\u4f53\u306e\u30b5\u30a4\u30ba\uff09\u304c\u8fd4\u3063\u3066\u304d\u3066\u3001\u5f8c\u7d9a\u306e\u51e6\u7406\u304c\u3059\u3079\u3066\u72c2\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4-2. \u6b63\u3057\u3044\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u6700\u3082\u78ba\u5b9f\u306a\u65b9\u6cd5\u306f\u3001<strong>\u8981\u7d20\u6570\u3092\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u660e\u793a\u7684\u306b\u6e21\u3059<\/strong>\u3053\u3068\u3067\u3059\u3002C\u8a00\u8a9e\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570\uff08\u4f8b\uff1a<code>qsort<\/code>\u3084<code>memcpy<\/code>\uff09\u3082\u3001\u914d\u5217\u672c\u4f53\u3068\u306f\u5225\u306b\u8981\u7d20\u6570\u3084\u30d0\u30a4\u30c8\u6570\u3092\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u8a2d\u8a08\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u3053\u306e\u4ed5\u69d8\u4e0a\u306e\u5236\u7d04\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u914d\u5217\u3092\u95a2\u6570\u306b\u6e21\u3059\u3068\u304d\u306f\u3001\u8981\u7d20\u6570\uff08\u307e\u305f\u306f\u30d0\u30a4\u30c8\u6570\uff09\u3092\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u4e00\u7dd2\u306b\u6e21\u3059<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u95a2\u6570\u306e\u5185\u90e8\u3067\u53d7\u3051\u53d6\u3063\u305f\u914d\u5217\u5f15\u6570\u306b\u5bfe\u3057\u3066sizeof\u3092\u4f7f\u308f\u306a\u3044\uff08\u30dd\u30a4\u30f3\u30bf\u30b5\u30a4\u30ba\u304c\u8fd4\u308b\u3060\u3051\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>sizeof\u3067\u8981\u7d20\u6570\u3092\u8a08\u7b97\u3059\u308b\u306a\u3089\u3001\u914d\u5217\u304c\u5b9f\u4f53\u3068\u3057\u3066\u5b58\u5728\u3059\u308b\u30b9\u30b3\u30fc\u30d7\uff08\u547c\u3073\u51fa\u3057\u5143\uff09\u3067\u8a08\u7b97\u3057\u3066\u304a\u304f<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u30de\u30af\u30ed\u3084\u95a2\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u7684\u306a\u5de5\u592b\u306b\u983c\u308b\u3088\u308a\u3001\u307e\u305a\u306f\u300c\u8981\u7d20\u6570\u3092\u660e\u793a\u7684\u306b\u6e21\u3059\u300d\u8a2d\u8a08\u3092\u57fa\u672c\u306b\u3059\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u8b66\u544a\u3092\u7121\u8996\u3057\u306a\u3044<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u4e00\u90e8\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001\u914d\u5217\u5f15\u6570\u306b\u5bfe\u3057\u3066sizeof\u3092\u4f7f\u3063\u3066\u3044\u308b\u30b3\u30fc\u30c9\u306b\u8b66\u544a\u3092\u51fa\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\uff08\u4f8b: GCC\u306e-Wsizeof-array-arg\u30aa\u30d7\u30b7\u30e7\u30f3\u306a\u3069\u3001\u8b66\u544a\u306e\u6709\u7121\u30fb\u7a2e\u985e\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u3084\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u308a\u7570\u306a\u308a\u307e\u3059\uff09\u3002\u8b66\u544a\u304c\u51fa\u305f\u5834\u5408\u306f\u300c\u6c17\u306e\u305b\u3044\u300d\u3067\u6e08\u307e\u305b\u305a\u3001\u8981\u7d20\u6570\u3092\u6e21\u3059\u8a2d\u8a08\u306b\u76f4\u3059\u5224\u65ad\u6750\u6599\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u3053\u306e\u300e\u914d\u5217\u3092\u6e21\u3059\u3068\u30dd\u30a4\u30f3\u30bf\u306b\u306a\u308b\u300f\u3068\u3044\u3046\u4ed5\u69d8\u306f\u3001C\u8a00\u8a9e\u3092\u5b66\u3076\u4eba\u306e\u591a\u304f\u304c\u4e00\u5ea6\u306f\u8e0f\u3080\u7f60\u3067\u3059\u3002\u9006\u306b\u8a00\u3048\u3070\u3001\u3053\u3053\u3067\u30cf\u30de\u3063\u305f\u7d4c\u9a13\u304c\u3042\u308b\u4eba\u307b\u3069\u3001C\u8a00\u8a9e\u306e\u8a2d\u8a08\u601d\u60f3\u3092\u4f53\u3067\u7406\u89e3\u3057\u3066\u3044\u308b\u3068\u3082\u8a00\u3048\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-05\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">05<\/span>\n  <span class=\"section-label\" style=\"display:block;\">POINTERS & TIMING<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba\u3068\u8a55\u4fa1\u30bf\u30a4\u30df\u30f3\u30b0<\/span>\n  <span class=\"section-desc\">\u300c\u4f55\u3092\u6307\u3057\u3066\u3044\u308b\u304b\u300d\u306b\u95a2\u4fc2\u306a\u304f\u4e00\u5b9a\u3067\u3042\u308b\u3053\u3068\u3001\u8a55\u4fa1\u30bf\u30a4\u30df\u30f3\u30b0\u306e\u539f\u5247\u3068\u4f8b\u5916<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30dd\u30a4\u30f3\u30bf\u81ea\u4f53\u306esizeof\u306f\u3001<strong>\u305d\u306e\u30dd\u30a4\u30f3\u30bf\u304c\u4f55\u306e\u578b\u3092\u6307\u3057\u3066\u3044\u308b\u304b\u306b\u95a2\u4fc2\u306a\u304f\u3001\u540c\u3058\u51e6\u7406\u7cfb\u3067\u3042\u308c\u3070\u4e00\u5b9a<\/strong>\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30dd\u30a4\u30f3\u30bf\u304c\u300c\u5024\u305d\u306e\u3082\u306e\u300d\u3067\u306f\u306a\u304f\u300c\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u300d\u3092\u4fdd\u6301\u3059\u308b\u5909\u6570\u3060\u304b\u3089\u3067\u3059\u3002int\u578b\u3092\u6307\u3059\u30dd\u30a4\u30f3\u30bf\u3082\u3001double\u578b\u3092\u6307\u3059\u30dd\u30a4\u30f3\u30bf\u3082\u3001\u69cb\u9020\u4f53\u3092\u6307\u3059\u30dd\u30a4\u30f3\u30bf\u3082\u3001\u540c\u3058\u51e6\u7406\u7cfb\u3067\u3042\u308c\u3070\u540c\u3058\u30d0\u30a4\u30c8\u6570\u306b\u306a\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\uff0832bit\u74b0\u5883\u306a\u30894\u30d0\u30a4\u30c8\u300164bit\u74b0\u5883\u306a\u30898\u30d0\u30a4\u30c8\u304c\u591a\u3044\u3067\u3059\u304c\u3001\u3053\u308c\u3082\u5b9f\u88c5\u4f9d\u5b58\u3067\u3059\uff09\u3002<\/p>\n\n\n\n<div style=\"margin:20px 0;\">\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:18px 22px;border-radius:8px;overflow-x:auto;font-size:13px;line-height:1.8;\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int    *p_int    = NULL;\n    double *p_double = NULL;\n    char   *p_char   = NULL;\n\n    printf(\"sizeof(p_int)    = %zu\\n\", sizeof(p_int));\n    printf(\"sizeof(p_double) = %zu\\n\", sizeof(p_double));\n    printf(\"sizeof(p_char)   = %zu\\n\", sizeof(p_char));\n    \/* \u591a\u304f\u306e64bit\u74b0\u5883\u3067\u306f\u3044\u305a\u308c\u3082 8 \u306b\u306a\u308b\uff08\u6307\u3059\u578b\u306b\u95a2\u4fc2\u306a\u304f\u540c\u3058\uff09 *\/\n    return 0;\n}\n<\/code><\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">5-1. sizeof\u306e\u8a55\u4fa1\u30bf\u30a4\u30df\u30f3\u30b0\uff1a\u539f\u5247\u3068\u4f8b\u5916<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u524d\u534a\u306e\u7ae0\u3067\u3082\u89e6\u308c\u305f\u3068\u304a\u308a\u3001sizeof\u306f<strong>\u539f\u5247\u3068\u3057\u3066\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1<\/strong>\u3055\u308c\u307e\u3059\u3002\u5f0f\u306e\u4e2d\u8eab\uff08\u4f8b\u3048\u3070\u95a2\u6570\u547c\u3073\u51fa\u3057\u3092\u542b\u3080\u5f0f\uff09\u3092\u5b9f\u969b\u306b\u5b9f\u884c\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u305d\u306e\u5f0f\u304c\u6301\u3064\u300c\u578b\u300d\u3060\u3051\u3092\u898b\u3066\u3001\u5fc5\u8981\u306a\u30d0\u30a4\u30c8\u6570\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001<code>sizeof(some_function())<\/code>\u306e\u3088\u3046\u306b\u66f8\u3044\u3066\u3082\u3001<code>some_function()<\/code>\u81ea\u4f53\u306f\u547c\u3073\u51fa\u3055\u308c\u305a\u3001\u623b\u308a\u5024\u306e\u578b\u306e\u30b5\u30a4\u30ba\u3060\u3051\u304c\u8a08\u7b97\u3055\u308c\u308b\u3001\u3068\u3044\u3046\u70b9\u306f\u899a\u3048\u3066\u304a\u304f\u3068\u3088\u3044\u6027\u8cea\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001C99\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f<strong>\u53ef\u5909\u9577\u914d\u5217\uff08VLA\uff09<\/strong>\u306b\u5bfe\u3059\u308bsizeof\u3060\u3051\u306f\u4f8b\u5916\u3067\u3059\u3002VLA\u306f\u914d\u5217\u306e\u30b5\u30a4\u30ba\u304c\u5b9f\u884c\u6642\u306b\u6c7a\u307e\u308b\u5909\u6570\uff08\u95a2\u6570\u306e\u5b9f\u884c\u4e2d\u306b\u6c7a\u307e\u308b\u30b5\u30a4\u30ba\u3092\u4f7f\u3063\u3066\u5ba3\u8a00\u3059\u308b\u914d\u5217\uff09\u3067\u3042\u308b\u305f\u3081\u3001\u305d\u306esizeof\u3082<strong>\u5b9f\u884c\u6642\u306b\u8a55\u4fa1<\/strong>\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u300csizeof\u306f\u5e38\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u6c7a\u307e\u308b\u300d\u3068\u3044\u3046\u8aac\u660e\u3092\u898b\u304b\u3051\u305f\u3089\u3001\u3053\u306eVLA\u306e\u4f8b\u5916\u304c\u3042\u308b\u3053\u3068\u3082\u5408\u308f\u305b\u3066\u62bc\u3055\u3048\u3066\u304a\u304f\u3068\u3001\u3088\u308a\u6b63\u78ba\u306a\u7406\u89e3\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u8a55\u4fa1 \/ VLA\uff08\u53ef\u5909\u9577\u914d\u5217\uff09<\/strong>\uff1a\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u8a55\u4fa1\u3068\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u524d\uff08\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u6bb5\u968e\uff09\u3067\u8a08\u7b97\u7d50\u679c\u304c\u78ba\u5b9a\u3059\u308b\u3053\u3068\u3002sizeof\u306f\u901a\u5e38\u3053\u306e\u6027\u8cea\u3092\u6301\u3064\u304c\u3001C99\u4ee5\u964d\u306e\u53ef\u5909\u9577\u914d\u5217\uff08VLA\u3001\u5ba3\u8a00\u6642\u306b\u5909\u6570\u3067\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\u3059\u308b\u914d\u5217\uff09\u306b\u5bfe\u3057\u3066\u306f\u3001\u30b5\u30a4\u30ba\u304c\u5b9f\u884c\u6642\u306b\u3057\u304b\u5206\u304b\u3089\u306a\u3044\u305f\u3081\u3001sizeof\u3082\u5b9f\u884c\u6642\u306b\u8a55\u4fa1\u3055\u308c\u308b\u4f8b\u5916\u7684\u306a\u30b1\u30fc\u30b9\u3068\u306a\u308b\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>Step 1<\/strong><br><span style=\"font-size:12px;\">sizeof\u306e<br>\u5bfe\u8c61\u3092\u78ba\u8a8d<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Step 2<\/strong><br><span style=\"font-size:12px;\">\u56fa\u5b9a\u30b5\u30a4\u30ba\u306e<br>\u578b\u30fb\u914d\u5217\u304b\uff1f<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Step 3(\u901a\u5e38)<\/strong><br><span style=\"font-size:12px;\">\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b<br>\u30b5\u30a4\u30ba\u304c\u78ba\u5b9a<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Step 3(VLA\u4f8b\u5916)<\/strong><br><span style=\"font-size:12px;\">\u5b9f\u884c\u6642\u307e\u3067<br>\u30b5\u30a4\u30ba\u304c\u672a\u78ba\u5b9a<\/span><\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300c\u57fa\u672c\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u3001\u3067\u3082\u4f8b\u5916\u304c\u3042\u308b\u300d\u3068\u3044\u3046\u8aac\u660e\u3001\u3059\u3054\u304f\u5b9f\u52d9\u3063\u307d\u3044\u3068\u601d\u3044\u307e\u3057\u305f\u3002\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u4eba\u305f\u3061\u304c\u3088\u304f\u300e\u30b1\u30fc\u30b9\u30d0\u30a4\u30b1\u30fc\u30b9\u3067\u3059\u300f\u3068\u8a00\u3046\u7406\u7531\u304c\u3001\u3053\u3046\u3044\u3046\u7d30\u90e8\u306e\u7a4d\u307f\u91cd\u306d\u306a\u3093\u3060\u306a\u3068\u8179\u843d\u3061\u3057\u307e\u3057\u305f\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-06\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">06<\/span>\n  <span class=\"section-label\" style=\"display:block;\">COMMON BUGS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u5b9f\u52d9\u3067\u3042\u308a\u304c\u3061\u306a\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3\u3068\u9632\u6b62\u7b56<\/span>\n  <span class=\"section-desc\">sizeof\u307e\u308f\u308a\u3067\u767a\u751f\u3057\u3084\u3059\u3044\u5178\u578b\u7684\u306a\u30df\u30b9\u3092\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u5316<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u307e\u3067\u898b\u3066\u304d\u305f\u4ed5\u69d8\u3092\u8e0f\u307e\u3048\u3066\u3001\u5b9f\u52d9\u306e\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u5b9f\u969b\u306b\u3088\u304f\u6307\u6458\u3055\u308c\u308b\u3001sizeof\u307e\u308f\u308a\u306e\u5178\u578b\u7684\u306a\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3<\/th><th>\u8d77\u3053\u308b\u3053\u3068<\/th><th>\u9632\u6b62\u7b56<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u914d\u5217\u3092\u95a2\u6570\u306b\u6e21\u3057\u305f\u5f8c\u3001\u5185\u90e8\u3067sizeof\u3092\u4f7f\u3046<\/td><td>\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba\u304c\u8fd4\u308a\u3001\u8981\u7d20\u6570\u306e\u8a08\u7b97\u304c\u72c2\u3046<\/td><td>\u8981\u7d20\u6570\u3092\u5225\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059<\/td><\/tr>\n<tr><td>sizeof(\u30dd\u30a4\u30f3\u30bf)\u3092\u8981\u7d20\u30b5\u30a4\u30ba\u3068\u52d8\u9055\u3044\u3057\u3066malloc\u306b\u4f7f\u3046<\/td><td>\u78ba\u4fdd\u3059\u308b\u30e1\u30e2\u30ea\u91cf\u304c\u610f\u56f3\u3068\u7570\u306a\u308a\u3001\u30d0\u30c3\u30d5\u30a1\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u539f\u56e0\u306b\u306a\u308a\u5f97\u308b<\/td><td>sizeof(*ptr)\u3084sizeof(\u8981\u7d20\u306e\u578b)\u3092\u4f7f\u3046<\/td><\/tr>\n<tr><td>\u69cb\u9020\u4f53\u3092\u305d\u306e\u307e\u307e\u30d5\u30a1\u30a4\u30eb\/\u901a\u4fe1\u3067\u9001\u53d7\u4fe1\u3059\u308b<\/td><td>\u74b0\u5883\u304c\u5909\u308f\u308b\u3068\u30d1\u30c7\u30a3\u30f3\u30b0\u306e\u9055\u3044\u3067\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u5d29\u308c\u308b<\/td><td>\u660e\u793a\u7684\u306a\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u51e6\u7406\u3092\u66f8\u304f<\/td><\/tr>\n<tr><td>strcpy\u7b49\u306e\u6587\u5b57\u5217\u51e6\u7406\u3067sizeof(char\u914d\u5217)\u3068\u6587\u5b57\u5217\u9577\u3092\u6df7\u540c\u3059\u308b<\/td><td>\u7d42\u7aef\u306e\u30cc\u30eb\u6587\u5b57\u3084\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u306e\u6271\u3044\u3092\u8aa4\u308b<\/td><td>strlen\u3068\u5f79\u5272\u3092\u533a\u5225\u3057\u3066\u4f7f\u3044\u5206\u3051\u308b<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h3 class=\"wp-block-heading\">6-1. sizeof\u3068\u6587\u5b57\u5217\u9577\uff08strlen\uff09\u306e\u9055\u3044<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">char\u578b\u306e\u914d\u5217\u306b\u5bfe\u3059\u308bsizeof\u306f\u300c\u914d\u5217\u3068\u3057\u3066\u78ba\u4fdd\u3055\u308c\u3066\u3044\u308b\u30d0\u30a4\u30c8\u6570\u300d\u3092\u8fd4\u3057\u307e\u3059\u304c\u3001<strong>strlen\u95a2\u6570<\/strong>\u306f\u300c\u6587\u5b57\u5217\u306e\u5b9f\u969b\u306e\u9577\u3055\uff08\u7d42\u7aef\u306e\u30cc\u30eb\u6587\u5b57\\0\u3092\u542b\u307e\u306a\u3044\u3001\u5b9f\u969b\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u6587\u5b57\u6570\uff09\u300d\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u306e2\u3064\u306f\u4f3c\u3066\u975e\u306a\u308b\u5024\u3067\u3042\u308a\u3001\u914d\u5217\u306e\u78ba\u4fdd\u30b5\u30a4\u30ba\u3068\u3001\u5b9f\u969b\u306b\u5165\u3063\u3066\u3044\u308b\u6587\u5b57\u5217\u306e\u9577\u3055\u304c\u5e38\u306b\u4e00\u81f4\u3059\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<div style=\"margin:20px 0;\">\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:18px 22px;border-radius:8px;overflow-x:auto;font-size:13px;line-height:1.8;\"><code>#include &lt;stdio.h&gt;\n#include &lt;string.h&gt;\n\nint main(void) {\n    char buf[100] = \"hello\";\n    printf(\"sizeof(buf) = %zu\\n\", sizeof(buf));   \/* 100 (\u78ba\u4fdd\u3057\u3066\u3044\u308b\u914d\u5217\u306e\u30b5\u30a4\u30ba) *\/\n    printf(\"strlen(buf) = %zu\\n\", strlen(buf));   \/* 5   (\u5b9f\u969b\u306e\u6587\u5b57\u5217\u306e\u9577\u3055) *\/\n    return 0;\n}\n<\/code><\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\uff08\u65e5\u672c\u8a9e\u306a\u3069\uff09\u3092\u6271\u3046\u5834\u5408\u306e\u6ce8\u610f<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">strlen\u304c\u8fd4\u3059\u306e\u306f\u300c\u30d0\u30a4\u30c8\u6570\u300d\u3067\u3042\u308a\u300c\u6587\u5b57\u6570\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002UTF-8\u306a\u30691\u6587\u5b57\u304c\u8907\u6570\u30d0\u30a4\u30c8\u3067\u69cb\u6210\u3055\u308c\u308b\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u3092\u6271\u3046\u5834\u5408\u3001strlen\u306e\u623b\u308a\u5024\u306f\u898b\u305f\u76ee\u306e\u6587\u5b57\u6570\u3068\u4e00\u81f4\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u6587\u5b57\u6570\u305d\u306e\u3082\u306e\u3092\u6570\u3048\u305f\u3044\u5834\u5408\u306f\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u3092\u610f\u8b58\u3057\u305f\u5c02\u7528\u306e\u51e6\u7406\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-2. \u9759\u7684\u89e3\u6790\u30fb\u30b3\u30f3\u30d1\u30a4\u30e9\u8b66\u544a\u3092\u6d3b\u7528\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">sizeof\u307e\u308f\u308a\u306e\u30d0\u30b0\u306e\u591a\u304f\u306f\u3001\u76ee\u8996\u306e\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3060\u3051\u3067\u306f\u898b\u843d\u3068\u3055\u308c\u304c\u3061\u3067\u3059\u3002\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u8b66\u544a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u53b3\u3057\u3081\u306b\u8a2d\u5b9a\u3059\u308b\u3001\u3042\u308b\u3044\u306f\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u3092\u4f75\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u3046\u3057\u305f\u300c\u52d5\u304f\u3051\u308c\u3069\u5371\u967a\u306a\u30b3\u30fc\u30c9\u300d\u3092\u691c\u51fa\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u4eba\u9593\u306e\u96c6\u4e2d\u529b\u306b\u4f9d\u5b58\u3057\u306a\u3044\u4ed5\u7d44\u307f\u3092\u7528\u610f\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u3001\u5b9f\u52d9\u3067\u306f\u7279\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u8b66\u544a\u30ec\u30d9\u30eb\u3092\u4e0a\u3052\u3066\u30d3\u30eb\u30c9\u3059\u308b\uff08\u898b\u843d\u3068\u3057\u306e\u691c\u51fa\u7387\u304c\u4e0a\u304c\u308b\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u914d\u5217\u3092\u6e21\u3059\u95a2\u6570\u306b\u306f\u3001\u8981\u7d20\u6570\u3092\u5fc5\u305a\u5f15\u6570\u3068\u3057\u3066\u6301\u305f\u305b\u308b\u8a2d\u8a08\u3092\u5fb9\u5e95\u3059\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u69cb\u9020\u4f53\u3092\u5916\u90e8\u3068\u3084\u308a\u53d6\u308a\u3059\u308b\u5834\u5408\u306f\u3001\u6c7a\u3081\u6253\u3061\u305b\u305a\u660e\u793a\u7684\u306a\u5909\u63db\u51e6\u7406\u3092\u66f8\u304f<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>sizeof\u3092\u4f7f\u3063\u3066\u3044\u308b\u7b87\u6240\u306f\u3001\u30ec\u30d3\u30e5\u30fc\u6642\u306b\u300c\u5bfe\u8c61\u304c\u914d\u5217\u306e\u5b9f\u4f53\u304b\u30dd\u30a4\u30f3\u30bf\u304b\u300d\u3092\u5fc5\u305a\u78ba\u8a8d\u3059\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u3053\u306e\u3042\u305f\u308a\u306e\u30c1\u30a7\u30c3\u30af\u9805\u76ee\u306f\u3001\u5b9f\u306f\u300c\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7d4c\u9a13\u3068\u52d8\u300d\u306b\u983c\u3063\u3066\u3044\u308b\u73fe\u5834\u304c\u307e\u3060\u591a\u3044\u9818\u57df\u3067\u3059\u3002\u3060\u304b\u3089\u3053\u305d\u3001\u6b21\u306e\u7ae0\u3067\u7d39\u4ecb\u3059\u308bAI\u306b\u3088\u308b\u30ec\u30d3\u30e5\u30fc\u306e\u5b9f\u904b\u7528\u30c7\u30fc\u30bf\u304c\u52b9\u3044\u3066\u304d\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-07\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">07<\/span>\n  <span class=\"section-label\" style=\"display:block;\">GENAI CASE STUDY<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u3010\u72ec\u81ea\u30c7\u30fc\u30bf\u3011GENAI\u793e\u5185\u306eAI\u30b3\u30fc\u30c9\u54c1\u8cea\u30c1\u30a7\u30c3\u30af\u5b9f\u904b\u7528<\/span>\n  <span class=\"section-desc\">Max 20x\u30d7\u30e9\u30f3\u5951\u7d04\u4f1a\u793e\u304c\u3001\u958b\u767a\u73fe\u5834\u3067AI\u3092\u3069\u3046\u4f7f\u3063\u3066\u3044\u308b\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u306f\u3001\u5f0a\u793e\uff08\u682a\u5f0f\u4f1a\u793eGENAI\uff09\u3067\u5b9f\u969b\u306bAI\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u300cClaude Code\u300d\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u72b6\u6cc1\u3092\u3001\u6570\u5024\u3068\u4e8b\u4f8b\u30d9\u30fc\u30b9\u3067\u516c\u958b\u3057\u307e\u3059\u3002\u4eca\u56de\u306e\u30c6\u30fc\u30de\u3067\u3042\u308bsizeof\u306e\u3088\u3046\u306a\u300c\u7d30\u90e8\u306e\u4ed5\u69d8\u300d\u304c\u304b\u3089\u3080\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u73fe\u5834\u3067\u3001AI\u304c\u3069\u3046\u6a5f\u80fd\u3057\u3066\u3044\u308b\u304b\u3092\u30ea\u30a2\u30eb\u306b\u77e5\u3063\u3066\u3044\u305f\u3060\u304f\u305f\u3081\u306e\u7ae0\u3067\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u9805\u76ee<\/th><th>\u5185\u5bb9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u5951\u7d04\u30d7\u30e9\u30f3<\/td><td>Claude Max 20x\uff08\u6708$200 \/ \u7d0430,000\u5186\uff09<\/td><\/tr>\n<tr><td>\u5229\u7528\u958b\u59cb<\/td><td>2025\u5e74\u5f8c\u534a\u301c<\/td><\/tr>\n<tr><td>\u5229\u7528\u90e8\u7f72<\/td><td>\u7d4c\u55b6\u30fb\u55b6\u696d\u30fb\u5e83\u544a\u30fb\u958b\u767a\u30fb\u7d4c\u7406\u30fb\u79d8\u66f8\u696d\u52d9\u307e\u3067\u5168\u793e<\/td><\/tr>\n<tr><td>\u958b\u767a\u9818\u57df\u3067\u306e\u4e3b\u306a\u7528\u9014<\/td><td>WordPress\/LP\u5236\u4f5c\u30fb\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u66f8\u304d\u6368\u3066\u30fb\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u652f\u63f4<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\u3067\u306f\u300c\u5168\u3066\u306e\u696d\u52d9\u3092\u4f55\u304b\u3057\u3089Claude Code\u306b\u7d61\u307e\u305b\u308b\u300d\u3068\u3044\u3046\u65b9\u91dd\u3067\u904b\u7528\u3057\u3066\u304a\u308a\u3001\u958b\u767a\u9818\u57df\u3082\u4f8b\u5916\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u7d30\u304b\u3044\u4ed5\u69d8\u306e\u898b\u843d\u3068\u3057\uff08\u4eca\u56de\u306e\u3088\u3046\u306asizeof\u306e\u7f60\u3092\u542b\u3080\uff09\u306f\u3001\u4eba\u9593\u306e\u30ec\u30d3\u30e5\u30fc\u3060\u3051\u306b\u983c\u308b\u3068\u3069\u3046\u3057\u3066\u3082\u629c\u3051\u6f0f\u308c\u304c\u51fa\u3084\u3059\u3044\u9818\u57df\u3067\u3059\u304c\u3001AI\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306b\u4e00\u6b21\u30c1\u30a7\u30c3\u30af\u3092\u4efb\u305b\u308b\u3053\u3068\u3067\u3001\u4f53\u611f\u3068\u3057\u3066<strong>\u958b\u767a\u696d\u52d9\u306b\u304a\u3051\u308b\u66f8\u304d\u6368\u3066\u30b9\u30af\u30ea\u30d7\u30c8\u3084\u30c4\u30fc\u30eb\u958b\u767a\u306e\u305f\u3073\u306b\u6570\u6642\u9593\u5358\u4f4d\u306e\u78ba\u8a8d\u4f5c\u696d\u304c\u524a\u6e1b<\/strong>\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u6570\u5024\u306e\u6ce8\u610f\u66f8\u304d<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u4e0a\u8a18\u306f\u5f0a\u793e\u306e\u808c\u611f\u30d9\u30fc\u30b9\u306e\u6570\u5024\u3067\u3042\u308a\u3001\u696d\u7a2e\u30fb\u696d\u614b\u30fb\u62c5\u5f53\u8005\u306e\u30b9\u30ad\u30eb\u306b\u3088\u3063\u3066\u524a\u6e1b\u6642\u9593\u306f\u5909\u52d5\u3057\u307e\u3059\u3002\u300c\u5b8c\u5168\u81ea\u52d5\u5316\u300d\u3084\u300c\u30d0\u30b0\u304c\u30bc\u30ed\u306b\u306a\u3063\u305f\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u306f\u306a\u304f\u3001\u3042\u304f\u307e\u3067\u4eba\u9593\u306e\u30ec\u30d3\u30e5\u30fc\u8ca0\u8377\u3092\u8efd\u6e1b\u3059\u308b\u53c2\u8003\u60c5\u5831\u3068\u3057\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-1. \u5f0a\u793e\u5168\u4f53\u306e\u696d\u52d9\u524a\u6e1b\u30c7\u30fc\u30bf\uff08\u53c2\u8003\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u958b\u767a\u9818\u57df\u306b\u9650\u3089\u305a\u3001\u5f0a\u793e\u3067\u306f\u8907\u6570\u306e\u696d\u52d9\u9818\u57df\u3067Claude Code\u3092\u6d3b\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306f2026\u5e744\u6708\u6642\u70b9\u306e\u808c\u611f\u30d9\u30fc\u30b9\u306e\u6982\u7b97\u5024\u3067\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u696d\u52d9\u9818\u57df<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><th>\u6982\u7b97\u524a\u6e1b\u6642\u9593<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u55b6\u696d<\/td><td>\u63d0\u6848\u66f8\u30fb\u898b\u7a4d\u30fb\u9867\u5ba2\u5225\u8cc7\u6599\u306e\u81ea\u52d5\u751f\u6210<\/td><td>\u903120\u6642\u9593 \u2192 \u90312\u6642\u9593<\/td><\/tr>\n<tr><td>\u5e83\u544a\u904b\u7528<\/td><td>\u9031\u6b21\u30ec\u30dd\u30fc\u30c8\u30fbCPA\u5206\u6790\u30fb\u914d\u4fe1\u5185\u5bb9\u8abf\u6574<\/td><td>\u903110\u6642\u9593 \u2192 \u90311\u6642\u9593<\/td><\/tr>\n<tr><td>\u30d6\u30ed\u30b0\u8a18\u4e8b<\/td><td>SEO\u8a18\u4e8b\u57f7\u7b46\u30fb\u30ea\u30e9\u30a4\u30c8\u30fb\u5185\u90e8\u30ea\u30f3\u30af\u6700\u9069\u5316<\/td><td>1\u672c8\u6642\u9593 \u2192 1\u672c1\u6642\u9593<\/td><\/tr>\n<tr><td>\u7d4c\u7406<\/td><td>\u8acb\u6c42\u66f8\u30c1\u30a7\u30c3\u30af\u30fb\u7d4c\u8cbb\u4ed5\u8a33\u30fbFreee\u9023\u643a<\/td><td>\u670840\u6642\u9593 \u2192 \u67085\u6642\u9593<\/td><\/tr>\n<tr><td>\u79d8\u66f8\u696d\u52d9<\/td><td>\u65e5\u5831\u751f\u6210\u30fb\u8b70\u4e8b\u9332\u30fb\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u8abf\u6574<\/td><td>\u65e52\u6642\u9593 \u2192 \u65e515\u5206<\/td><\/tr>\n<tr><td>\u958b\u767a<\/td><td>WordPress\/LP\u5236\u4f5c\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u66f8\u304d\u6368\u3066<\/td><td>\u90fd\u5ea6\u6570\u6642\u9593\u524a\u6e1b<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">sizeof\u306e\u4ed5\u69d8\u307f\u305f\u3044\u306a\u300c\u77e5\u3063\u3066\u3044\u308b\u4eba\u306b\u306f\u5e38\u8b58\u3001\u77e5\u3089\u306a\u3044\u4eba\u306b\u306f\u843d\u3068\u3057\u7a74\u300d\u3068\u3044\u3046\u7d30\u90e8\u306f\u3001\u7d4c\u7406\u3084\u55b6\u696d\u306e\u5b9f\u52d9\u306b\u3082\u305f\u304f\u3055\u3093\u3042\u308a\u307e\u3059\u3002\u3046\u3061\u304cClaude Code\u3092\u5168\u793e\u3067\u4f7f\u3063\u3066\u3044\u308b\u306e\u3082\u3001\u3053\u3046\u3044\u3046\u7d30\u90e8\u306e\u30c1\u30a7\u30c3\u30af\u3092\u4eba\u9593\u3060\u3051\u306b\u80cc\u8ca0\u308f\u305b\u306a\u3044\u305f\u3081\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-08\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">08<\/span>\n  <span class=\"section-label\" style=\"display:block;\">BEYOND MEMORIZATION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u3010\u72ec\u81ea\u3011\u4ed5\u69d8\u306e\u7d30\u90e8\u3092\u6697\u8a18\u3057\u306a\u304f\u3066\u3044\u3044\u6642\u4ee3\u306e\u7d4c\u55b6\u30a4\u30f3\u30d1\u30af\u30c8<\/span>\n  <span class=\"section-desc\">sizeof\u306e\u3088\u3046\u306a\u4f4e\u30ec\u30d9\u30eb\u306a\u77e5\u8b58\u306f\u3001\u7d4c\u55b6\u8005\u306b\u3068\u3063\u3066\u4f55\u3092\u610f\u5473\u3059\u308b\u306e\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u307e\u3067\u8aad\u3093\u3067\u300c\u914d\u5217\u304c\u30dd\u30a4\u30f3\u30bf\u306b\u5909\u308f\u308b\u300d\u300c\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u304c\u5358\u7d14\u306a\u5408\u8a08\u3068\u4e00\u81f4\u3057\u306a\u3044\u300d\u3068\u3044\u3063\u305f\u8a71\u306b\u3001\u6b63\u76f4\u30d4\u30f3\u3068\u3053\u306a\u304b\u3063\u305f\u7d4c\u55b6\u8005\u306e\u65b9\u3082\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u305d\u308c\u306f\u81ea\u7136\u306a\u3053\u3068\u3067\u3059\u3002sizeof\u306e\u4ed5\u69d8\u306f\u3001C\u8a00\u8a9e\u3092\u5c02\u9580\u306b\u6271\u3046\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3042\u3063\u3066\u3082\u3001\u6cb9\u65ad\u3059\u308b\u3068\u8e0f\u307f\u5916\u3059\u7e4a\u7d30\u306a\u9818\u57df\u3060\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001\u3053\u3053\u3067\u8003\u3048\u3066\u3044\u305f\u3060\u304d\u305f\u3044\u306e\u306f<strong>\u300c\u3053\u306e\u77e5\u8b58\u3092\u8ab0\u304c\u6b63\u78ba\u306b\u6271\u3048\u308b\u304b\u300d\u3068\u3044\u3046\u554f\u984c\u81ea\u4f53\u304c\u3001\u3053\u306e\u6570\u5e74\u3067\u69cb\u9020\u7684\u306b\u5909\u308f\u3063\u3066\u304d\u3066\u3044\u308b<\/strong>\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u304b\u3064\u3066\u306f\u3001\u3053\u3046\u3057\u305f\u7d30\u90e8\u306e\u4ed5\u69d8\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3057\u3066\u3044\u308b\u4eba\u6750\uff08\u7d4c\u9a13\u8c4a\u5bcc\u306aC\u30a8\u30f3\u30b8\u30cb\u30a2\uff09\u3092\u63a1\u7528\u3059\u308b\u304b\u3001\u793e\u5185\u3067\u9577\u671f\u9593\u304b\u3051\u3066\u80b2\u6210\u3059\u308b\u304b\u3057\u304b\u9078\u629e\u80a2\u304c\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8-1. \u300c\u77e5\u3089\u306a\u3044\u3068\u4e8b\u6545\u308b\u300d\u304b\u3089\u300cAI\u304c\u6b63\u78ba\u306b\u66f8\u3044\u3066\u304f\u308c\u308b\u300d\u3078<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u73fe\u5728\u306eClaude Code\u306e\u3088\u3046\u306a\u81ea\u5f8b\u578bAI\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306f\u3001\u4eca\u56de\u53d6\u308a\u4e0a\u3052\u305fsizeof\u306e\u914d\u5217decay\u3084\u69cb\u9020\u4f53\u306e\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3068\u3044\u3063\u305f\u3001\u4eba\u9593\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u9593\u9055\u3048\u3084\u3059\u3044\u4ed5\u69d8\u3092\u8e0f\u307e\u3048\u305f\u30b3\u30fc\u30c9\u3092\u3001\u9ad8\u3044\u7cbe\u5ea6\u3067\u751f\u6210\u30fb\u30ec\u30d3\u30e5\u30fc\u3067\u304d\u307e\u3059\u3002\u3082\u3061\u308d\u3093<strong>\u300c\u7d76\u5bfe\u306b\u30df\u30b9\u3092\u3057\u306a\u3044\u300d\u3068\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u304f<\/strong>\u3001\u91cd\u8981\u306a\u7b87\u6240\u306f\u4eba\u9593\u306b\u3088\u308b\u30ec\u30d3\u30e5\u30fc\u304c\u5fc5\u8981\u3067\u3059\u304c\u3001\u5c11\u306a\u304f\u3068\u3082\u300c\u3053\u306e\u4ed5\u69d8\u3092\u77e5\u3063\u3066\u3044\u308b\u4eba\u6750\u3092\u63a1\u7528\u30fb\u80b2\u6210\u3067\u304d\u308b\u307e\u3067\u958b\u767a\u3092\u9032\u3081\u3089\u308c\u306a\u3044\u300d\u3068\u3044\u3046\u5236\u7d04\u304b\u3089\u306f\u89e3\u653e\u3055\u308c\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a,#2a1015);border-radius:12px;padding:20px 24px;margin:24px 0;display:flex;align-items:center;gap:16px;color:#fff;\">\n  <span style=\"font-size:36px;\">&#127942;<\/span>\n  <div>\n    <div style=\"font-size:13px;color:#dc2626;font-weight:700;letter-spacing:1px;\">VERDICT<\/div>\n    <div style=\"font-size:18px;font-weight:800;\">Claude Code \u306b\u8ecd\u914d<\/div>\n    <div style=\"font-size:14px;color:rgba(255,255,255,0.7);margin-top:4px;\">\u4f4e\u30ec\u30d9\u30eb\u306a\u4ed5\u69d8\u306e\u6b63\u78ba\u6027\u306fAI\u306b\u4efb\u305b\u3001\u7d4c\u55b6\u8005\u306f\u300c\u4f55\u3092\u4f5c\u308b\u304b\u300d\u300c\u4f55\u3092\u4efb\u305b\u308b\u304b\u300d\u306e\u5224\u65ad\u306b\u96c6\u4e2d\u3059\u308b\u3002\u3053\u308c\u304c\u4eca\u306e\u6642\u4ee3\u306e\u5408\u7406\u7684\u306a\u5f79\u5272\u5206\u62c5\u3002<\/div>\n  <\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u7d4c\u55b6\u8005\u306b\u3068\u3063\u3066\u3001\u5b9f\u306f\u975e\u5e38\u306b\u5927\u304d\u306a\u610f\u5473\u3092\u6301\u3061\u307e\u3059\u3002<strong>\u300c\u5c02\u9580\u7684\u306aC\u8a00\u8a9e\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u63a1\u7528\u30fb\u80b2\u6210\u3057\u306a\u304f\u3066\u3082\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u81ea\u52d5\u5316\u3084\u6539\u4fee\u306b\u7740\u624b\u3067\u304d\u308b\u300d<\/strong>\u3068\u3044\u3046\u3053\u3068\u3060\u304b\u3089\u3067\u3059\u3002\u3053\u308c\u307e\u3067\u300c\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u3044\u306a\u3044\u304b\u3089\u300d\u3068\u3044\u3046\u7406\u7531\u3067\u6b62\u307e\u3063\u3066\u3044\u305f\u793e\u5185\u306e\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u6539\u5584\u304c\u3001AI\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3092\u4ecb\u3059\u308b\u3053\u3068\u3067\u52d5\u304d\u51fa\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8-2. \u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u3053\u306e\u5909\u5316\u3092\u6d3b\u304b\u3059\u305f\u3081\u306e3\u30b9\u30c6\u30c3\u30d7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3068\u306f\u3044\u3048\u3001\u3044\u304d\u306a\u308a\u300c\u5168\u90e8AI\u306b\u4efb\u305b\u3088\u3046\u300d\u3068\u8003\u3048\u308b\u3068\u5931\u6557\u3057\u304c\u3061\u3067\u3059\u3002\u5f0a\u793e\u306e\u5c0e\u5165\u652f\u63f4\u306e\u7d4c\u9a13\u304b\u3089\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b9\u30c6\u30c3\u30d7\u3067\u7740\u624b\u3059\u308b\u306e\u304c\u73fe\u5b9f\u7684\u3060\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>Step 1<\/strong><br><span style=\"font-size:12px;\">\u9762\u5012\u306a\u696d\u52d9\u3092<br>1\u3064\u3060\u3051\u9078\u3076<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Step 2<\/strong><br><span style=\"font-size:12px;\">Claude Code\u306b<br>\u4efb\u305b\u3066\u307f\u308b<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Step 3<\/strong><br><span style=\"font-size:12px;\">\u52b9\u679c\u3092\u691c\u8a3c\u3057<br>\u6a2a\u5c55\u958b\u3059\u308b<\/span><\/div>\n<\/div>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u6700\u521d\u304b\u3089\u300c\u5168\u793e\u5c0e\u5165\u300d\u3092\u72d9\u308f\u305a\u3001\u9762\u5012\u306a\u696d\u52d9\u30921\u3064\u3060\u3051\u9078\u3093\u3067\u8a66\u3059<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u6280\u8853\u7684\u306a\u7d30\u90e8\uff08\u4eca\u56de\u306esizeof\u306e\u3088\u3046\u306a\u4ed5\u69d8\uff09\u3092\u81ea\u5206\u3067\u899a\u3048\u3088\u3046\u3068\u3057\u306a\u3044\u3001AI\u306b\u4efb\u305b\u308b\u9818\u57df\u3068\u5272\u308a\u5207\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u91cd\u8981\u306a\u5224\u65ad\u30fb\u6700\u7d42\u78ba\u8a8d\u306f\u4eba\u9593\u304c\u884c\u3044\u3001AI\u306f\u5b9f\u88c5\u30fb\u4e00\u6b21\u30c1\u30a7\u30c3\u30af\u306e\u62c5\u5f53\u3068\u4f4d\u7f6e\u3065\u3051\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u52b9\u679c\u304c\u898b\u3048\u305f\u3089\u3001\u540c\u3058\u8003\u3048\u65b9\u3092\u4ed6\u306e\u696d\u52d9\u9818\u57df\uff08\u55b6\u696d\u30fb\u7d4c\u7406\u30fb\u5e83\u544a\u306a\u3069\uff09\u306b\u3082\u5e83\u3052\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\uff08\u682a\u5f0f\u4f1a\u793eGENAI\uff09\u81ea\u8eab\u3082\u3001\u5c02\u4efb\u306eC\u8a00\u8a9e\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u4f55\u4eba\u3082\u62b1\u3048\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u308c\u3067\u3082\u3001\u696d\u52d9\u3067\u5fc5\u8981\u306b\u306a\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3084\u30c4\u30fc\u30eb\u306e\u66f8\u304d\u6368\u3066\u3001\u793e\u5185\u30b7\u30b9\u30c6\u30e0\u306e\u7d30\u304b\u3044\u6539\u4fee\u3092\u3001Claude Code\u3092\u4ecb\u3057\u3066\u56de\u305b\u3066\u3044\u307e\u3059\u3002<strong>\u300c\u6280\u8853\u8005\u3092\u63a1\u7528\u30fb\u80b2\u6210\u3057\u306a\u304f\u3066\u3082\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3092\u81ea\u52d5\u5316\u3067\u304d\u308b\u300d<\/strong>\u3068\u3044\u3046\u6642\u4ee3\u306e\u5909\u5316\u3092\u3001\u5b9f\u969b\u306b\u793e\u5185\u3067\u4f53\u611f\u3057\u3066\u3044\u308b\u7acb\u5834\u304b\u3089\u3001\u3053\u306e\u8a18\u4e8b\u3092\u304a\u5c4a\u3051\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">sizeof\u306e\u3088\u3046\u306a\u8a71\u306f\u3001\u7d4c\u55b6\u8005\u306e\u65b9\u304c\u81ea\u5206\u3067\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306b\u77e5\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u300e\u3053\u3046\u3044\u3046\u7d30\u90e8\u3092\u6b63\u78ba\u306b\u6271\u3048\u308b\u304b\u3069\u3046\u304b\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u54c1\u8cea\u304c\u5909\u308f\u308b\u300f\u3068\u3044\u3046\u611f\u899a\u3060\u3051\u306f\u6301\u3063\u3066\u304a\u304f\u3068\u3001AI\u6d3b\u7528\u306e\u5224\u65ad\u304c\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300c\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u96c7\u308f\u306a\u3044\u3068\u4f55\u3082\u3067\u304d\u306a\u3044\u300d\u6642\u4ee3\u304b\u3089\u3001\u300cAI\u3068\u4e00\u7dd2\u306b\u5224\u65ad\u3059\u308c\u3070\u52d5\u304d\u51fa\u305b\u308b\u300d\u6642\u4ee3\u306b\u5909\u308f\u3063\u3066\u304d\u3066\u3044\u308b\u3068\u611f\u3058\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u5c11\u3057\u3067\u3082\u8208\u5473\u3092\u6301\u3063\u3066\u3044\u305f\u3060\u3051\u305f\u3089\u3001\u305c\u3072\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3082\u898b\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-c-sizeof-operator&#038;blog_slug=cc-c-sizeof-operator\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-c-sizeof-operator&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-09\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">09<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CONCLUSION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u307e\u3068\u3081<\/span>\n  <span class=\"section-desc\">sizeof\u306e\u6b63\u78ba\u306a\u7406\u89e3\u3068\u3001\u305d\u3053\u304b\u3089\u898b\u3048\u308b\u7d4c\u55b6\u3078\u306e\u793a\u5506<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001C\u8a00\u8a9e\u306esizeof\u6f14\u7b97\u5b50\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u3001\u914d\u5217\u30fb\u69cb\u9020\u4f53\u30fb\u30dd\u30a4\u30f3\u30bf\u305d\u308c\u305e\u308c\u3067\u8d77\u3053\u308a\u3084\u3059\u3044\u7f60\u3001\u5b9f\u52d9\u3067\u306e\u30d0\u30b0\u30d1\u30bf\u30fc\u30f3\u3068\u9632\u6b62\u7b56\u3001\u305d\u3057\u3066\u5f0a\u793eGENAI\u306e\u5b9f\u904b\u7528\u30c7\u30fc\u30bf\u3068\u3001\u3053\u3046\u3057\u305f\u77e5\u8b58\u3092\u7d4c\u55b6\u8005\u304c\u6697\u8a18\u3057\u306a\u304f\u3066\u3088\u304f\u306a\u3063\u305f\u6642\u4ee3\u306e\u610f\u5473\u307e\u3067\u3092\u6574\u7406\u3057\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u30dd\u30a4\u30f3\u30c8\u3092\u632f\u308a\u8fd4\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>sizeof\u306f\u578b\u30fb\u5909\u6570\u30fb\u5f0f\u306e\u30d0\u30a4\u30c8\u30b5\u30a4\u30ba\u3092\u8fd4\u3059\u5358\u9805\u6f14\u7b97\u5b50\u3067\u3001\u591a\u304f\u306e\u5834\u5408\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u3055\u308c\u308b\uff08C99\u306eVLA\u306f\u4f8b\u5916\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u914d\u5217\u306e\u8981\u7d20\u6570\u306f\u300csizeof(\u914d\u5217\u5168\u4f53) \u00f7 sizeof(\u5148\u982d\u8981\u7d20)\u300d\u3067\u8a08\u7b97\u3067\u304d\u308b\u304c\u3001\u914d\u5217\u306e\u5b9f\u4f53\u304c\u3042\u308b\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u307f\u6709\u52b9<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u95a2\u6570\u306b\u914d\u5217\u3092\u6e21\u3059\u3068\u5148\u982d\u8981\u7d20\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u306bdecay\u3057\u3001\u95a2\u6570\u5185\u3067\u306esizeof\u306f\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba\u3092\u8fd4\u3059<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u306f\u3001\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\/\u30d1\u30c7\u30a3\u30f3\u30b0\u306e\u5f71\u97ff\u3067\u30e1\u30f3\u30d0\u30fc\u306e\u5358\u7d14\u5408\u8a08\u3068\u4e00\u81f4\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308b\uff08\u5b9f\u88c5\u4f9d\u5b58\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba\u306f\u3001\u6307\u3059\u5148\u306e\u578b\u306b\u95a2\u4fc2\u306a\u304f\u3001\u540c\u3058\u51e6\u7406\u7cfb\u3067\u3042\u308c\u3070\u4e00\u5b9a<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>sizeof\u3068strlen\u306f\u4f3c\u3066\u975e\u306a\u308b\u5024\u3067\u3042\u308a\u3001\u914d\u5217\u306e\u78ba\u4fdd\u30b5\u30a4\u30ba\u3068\u6587\u5b57\u5217\u306e\u5b9f\u9577\u306f\u5225\u7269\u3068\u3057\u3066\u6271\u3046\u5fc5\u8981\u304c\u3042\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u4f4e\u30ec\u30d9\u30eb\u306a\u4ed5\u69d8\u306e\u6b63\u78ba\u6027\u306fAI\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306b\u4efb\u305b\u3089\u308c\u308b\u6642\u4ee3\u306b\u306a\u308a\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u81ea\u52d5\u5316\u306b\u7740\u624b\u3057\u3084\u3059\u304f\u306a\u3063\u3066\u3044\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u3082\u91cd\u8981\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002<strong>sizeof\u306e\u3088\u3046\u306a\u7d30\u90e8\u306e\u4ed5\u69d8\u3092\u3001\u7d4c\u55b6\u8005\u81ea\u8eab\u304c\u3059\u3079\u3066\u6697\u8a18\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093<\/strong>\u3002\u5927\u4e8b\u306a\u306e\u306f\u300c\u3053\u3046\u3057\u305f\u7d30\u90e8\u306e\u6b63\u78ba\u6027\u304c\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u54c1\u8cea\u3084\u30d0\u30b0\u306e\u6709\u7121\u3092\u5de6\u53f3\u3059\u308b\u300d\u3068\u3044\u3046\u611f\u899a\u3092\u6301\u3063\u305f\u3046\u3048\u3067\u3001\u305d\u308c\u3092AI\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306b\u4efb\u305b\u308b\u3068\u3044\u3046\u5224\u65ad\u304c\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f0a\u793e\u3067\u306f\u3001Claude Code\u3092\u300c\u958b\u767a\u306e\u7d30\u90e8\u3092\u6b63\u78ba\u306b\u3053\u306a\u3057\u3066\u304f\u308c\u308b\u30d1\u30fc\u30c8\u30ca\u30fc\u300d\u3068\u3057\u3066\u4f4d\u7f6e\u3065\u3051\u308b\u3053\u3068\u3067\u3001\u5c02\u4efb\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u5927\u91cf\u306b\u62b1\u3048\u306a\u304f\u3066\u3082\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u6539\u4fee\u3084\u81ea\u52d5\u5316\u3092\u524d\u306b\u9032\u3081\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8003\u3048\u65b9\u306b\u5171\u611f\u3044\u305f\u3060\u3051\u305f\u65b9\u306f\u3001\u305c\u3072\u4ee5\u4e0b\u306eAI\u9b3c\u7ba1\u7406\u307e\u3067\u304a\u6c17\u8efd\u306b\u3054\u76f8\u8ac7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u300c\u6280\u8853\u8005\u3092\u63a1\u7528\u30fb\u80b2\u6210\u3057\u306a\u304f\u3066\u3082\u81ea\u52d5\u5316\u3067\u304d\u308b\u300d\u3092\u3001AI\u9b3c\u7ba1\u7406\u304c\u4e00\u7dd2\u306b\u8a2d\u8a08\u3057\u307e\u3059<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">sizeof\u306e\u3088\u3046\u306a\u7d30\u90e8\u306e\u4ed5\u69d8\u306b\u632f\u308a\u56de\u3055\u308c\u305a\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u81ea\u52d5\u5316\u3092\u524d\u306b\u9032\u3081\u305f\u3044\u65b9\u3078\u3002<br>\u5f0a\u793e\u306e\u5b9f\u904b\u7528\u30ce\u30a6\u30cf\u30a6\u3092\u30d9\u30fc\u30b9\u306b\u3001\u500b\u5225\u306b\u5c0e\u5165\u8a2d\u8a08\u306e\u3054\u76f8\u8ac7\u3092\u627f\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300c\u5c02\u9580\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u3044\u306a\u3044\u304b\u3089\u958b\u767a\u3092\u8ae6\u3081\u3066\u3044\u305f\u300d\u3068\u3044\u3046\u65b9\u306b\u3053\u305d\u77e5\u3063\u3066\u307b\u3057\u3044\u5185\u5bb9\u3067\u3059\u3002\u307e\u305a\u306f\u7121\u6599\u76f8\u8ac7\u3067\u3001\u3042\u306a\u305f\u306e\u4f1a\u793e\u306b\u6700\u9069\u306a\u9032\u3081\u65b9\u3092\u4e00\u7dd2\u306b\u898b\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:#fff;border:2px solid #eee;border-radius:16px;padding:32px 20px;margin:48px 0 16px;\">\n  <p style=\"text-align:center;font-size:13px;font-weight:700;color:#dc2626;letter-spacing:2px;margin:0 0 12px;\">NEXT STEP<\/p>\n  <p style=\"text-align:center;font-size:22px;font-weight:800;line-height:1.5;color:#1a1a1a;margin:0 0 24px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9\u3092\u3001\u3042\u306a\u305f\u306e\u30d3\u30b8\u30cd\u30b9\u3067<br>\u5b9f\u8df5\u3057\u3066\u307f\u307e\u305b\u3093\u304b\uff1f<\/p>\n  <div style=\"display:flex;gap:16px;flex-wrap:wrap;justify-content:center;\">\n    <div style=\"flex:1 1 300px;max-width:560px;background:#fafafa;border:1px solid #eee;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;\">\n      <img src=\"https:\/\/genai-ai.co.jp\/img\/flagship-onikanri.png\" alt=\"AI\u9b3c\u7ba1\u7406 \u2014 Claude Code\u5c0e\u5165\u652f\u63f4\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto;aspect-ratio:16\/9;object-fit:cover;display:block;\">\n      <div style=\"padding:20px 20px 24px;display:flex;flex-direction:column;flex:1;\">\n        <p style=\"font-size:13px;color:#dc2626;font-weight:700;margin:0 0 8px;\">AI\u6d3b\u7528\u3092\u81ea\u793e\u3067\u56de\u305b\u308b\u3088\u3046\u306b\u306a\u308a\u305f\u3044\u65b9\u3078<\/p>\n        <p style=\"font-size:20px;font-weight:800;color:#1a1a1a;margin:0 0 12px;\">AI\u9b3c\u7ba1\u7406<\/p>\n        <p style=\"font-size:14px;color:#555;margin:0 0 20px;line-height:1.7;\">Claude Code\u30fbCowork\u5c0e\u5165\u652f\u63f4\u304b\u3089\u696d\u52d9\u8a2d\u8a08\u30fb\u793e\u5185\u6d78\u900f\u307e\u3067\u5b9f\u8df5\u30d9\u30fc\u30b9\u3067\u4f34\u8d70\u3002\u300c\u81ea\u793e\u3067\u56de\u305b\u308b\u7d44\u7e54\u300d\u309290\u65e5\u3067\u4f5c\u308b\u7d4c\u55b6\u8005\u5411\u3051\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3002<\/p>\n        <div style=\"text-align:center;margin-top:auto;\">\n          <a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&utm_medium=article&utm_campaign=cc-c-sizeof-operator&utm_content=next-step-cta\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#dc2626;color:#fff;font-weight:700;font-size:15px;padding:14px 32px;border-radius:30px;text-decoration:none;\">AI\u9b3c\u7ba1\u7406\u3092\u8a73\u3057\u304f\u898b\u308b \u2192<\/a>\n        <\/div>\n      <\/div>\n    <\/div>\n    <div style=\"flex:1 1 300px;max-width:560px;background:#fafafa;border:1px solid #eee;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;\">\n      <img src=\"https:\/\/genai-ai.co.jp\/img\/flagship-aibpo.png\" alt=\"AIBPO by AI\u9b3c\u7ba1\u7406 \u2014 \u5b9a\u578b\u696d\u52d9\u306e\u4e38\u3054\u3068\u4ee3\u884c\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto;aspect-ratio:16\/9;object-fit:cover;display:block;\">\n      <div style=\"padding:20px 20px 24px;display:flex;flex-direction:column;flex:1;\">\n        <p style=\"font-size:13px;color:#dc2626;font-weight:700;margin:0 0 8px;\">\u696d\u52d9\u3092\u4e38\u3054\u3068\u4efb\u305b\u305f\u3044\u65b9\u3078<\/p>\n        <p style=\"font-size:20px;font-weight:800;color:#1a1a1a;margin:0 0 12px;\">AIBPO by AI\u9b3c\u7ba1\u7406<\/p>\n        <p style=\"font-size:14px;color:#555;margin:0 0 20px;line-height:1.7;\">\u8acb\u6c42\u51e6\u7406\u30fb\u30c7\u30fc\u30bf\u5165\u529b\u30fb\u554f\u3044\u5408\u308f\u305b\u5bfe\u5fdc\u306a\u3069\u306e\u5b9a\u578b\u696d\u52d9\u3092\u3001AI\u00d7\u4eba\u306e\u54c1\u8cea\u7ba1\u7406\u4f53\u5236\u3067\u4e38\u3054\u3068\u4ee3\u884c\u3002\u3044\u307e\u306e\u30b3\u30b9\u30c8\u306e75%\u76ee\u5b89\u3067\u3001\u65e5\u3005\u306f\u6210\u679c\u7269\u3092\u627f\u8a8d\u3059\u308b\u3060\u3051\u3002<\/p>\n        <div style=\"text-align:center;margin-top:auto;\">\n          <a href=\"https:\/\/genai-ai.co.jp\/ai-kanri\/ai-bpo\/?utm_source=blog&utm_medium=article&utm_campaign=cc-c-sizeof-operator&utm_content=next-step-cta-bpo\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#dc2626;color:#fff;font-weight:700;font-size:15px;padding:14px 32px;border-radius:30px;text-decoration:none;\">AIBPO\u3092\u8a73\u3057\u304f\u898b\u308b \u2192<\/a>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q. sizeof(\u914d\u5217)\u3068sizeof(\u30dd\u30a4\u30f3\u30bf)\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. sizeof(\u914d\u5217)\u306f\u914d\u5217\u5168\u4f53\u306e\u30d0\u30a4\u30c8\u6570\uff08\u8981\u7d20\u6570\u00d71\u8981\u7d20\u306e\u30b5\u30a4\u30ba\uff09\u3092\u8fd4\u3057\u307e\u3059\u304c\u3001sizeof(\u30dd\u30a4\u30f3\u30bf)\u306f\u30dd\u30a4\u30f3\u30bf\u81ea\u4f53\u304c\u5360\u3081\u308b\u30b5\u30a4\u30ba\uff08\u591a\u304f\u306e\u74b0\u5883\u30674\u30d0\u30a4\u30c8\u307e\u305f\u306f8\u30d0\u30a4\u30c8\uff09\u3092\u8fd4\u3057\u307e\u3059\u3002\u914d\u5217\u3092\u95a2\u6570\u306b\u6e21\u3059\u3068\u914d\u5217\u306f\u30dd\u30a4\u30f3\u30bf\u306bdecay\u3059\u308b\u305f\u3081\u3001\u95a2\u6570\u306e\u5185\u90e8\u3067sizeof\u3092\u4f7f\u3046\u3068\u30dd\u30a4\u30f3\u30bf\u306e\u30b5\u30a4\u30ba\u304c\u8fd4\u3063\u3066\u3057\u307e\u3046\u70b9\u304c\u5178\u578b\u7684\u306a\u6df7\u540c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u306a\u305c\u95a2\u6570\u306b\u914d\u5217\u3092\u6e21\u3059\u3068sizeof\u3067\u6b63\u3057\u3044\u8981\u7d20\u6570\u304c\u53d6\u308c\u306a\u304f\u306a\u308b\u306e\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. C\u8a00\u8a9e\u306e\u4ed5\u69d8\u4e0a\u3001\u914d\u5217\u3092\u95a2\u6570\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u3068\u3001\u305d\u306e\u914d\u5217\u306f\u81ea\u52d5\u7684\u306b\u300c\u5148\u982d\u8981\u7d20\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u300d\u306b\u5909\u63db\uff08decay\uff09\u3055\u308c\u307e\u3059\u3002\u95a2\u6570\u306e\u5185\u90e8\u3067\u306f\u53d7\u3051\u53d6\u3063\u305f\u5f15\u6570\u306f\u3082\u3046\u914d\u5217\u3067\u306f\u306a\u304f\u30dd\u30a4\u30f3\u30bf\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u305f\u3081\u3001sizeof\u3092\u4f7f\u3046\u3068\u30dd\u30a4\u30f3\u30bf\u81ea\u4f53\u306e\u30b5\u30a4\u30ba\u304c\u8fd4\u308a\u3001\u5143\u306e\u914d\u5217\u30b5\u30a4\u30ba\u306f\u5931\u308f\u308c\u307e\u3059\u3002\u5bfe\u51e6\u6cd5\u3068\u3057\u3066\u3001\u8981\u7d20\u6570\u3092\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u660e\u793a\u7684\u306b\u6e21\u3059\u8a2d\u8a08\u304c\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u304c\u30e1\u30f3\u30d0\u30fc\u306e\u5408\u8a08\u3068\u4e00\u81f4\u3057\u306a\u3044\u306e\u306f\u306a\u305c\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. CPU\u304c\u7279\u5b9a\u306e\u578b\u306e\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u3088\u304f\u8aad\u307f\u66f8\u304d\u3059\u308b\u305f\u3081\u306b\u3001\u578b\u3054\u3068\u306b\u6c7a\u3081\u3089\u308c\u305f\u30e1\u30e2\u30ea\u6574\u5217\u30eb\u30fc\u30eb\uff08\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\uff09\u304c\u3042\u308a\u3001\u3053\u308c\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u30e1\u30f3\u30d0\u30fc\u306e\u9593\u3084\u69cb\u9020\u4f53\u306e\u672b\u5c3e\u306b\u300c\u30d1\u30c7\u30a3\u30f3\u30b0\u300d\u3068\u547c\u3070\u308c\u308b\u8a70\u3081\u7269\u306e\u30d0\u30a4\u30c8\u3092\u633f\u5165\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u305f\u3081\u3067\u3059\u3002\u5177\u4f53\u7684\u306a\u633f\u5165\u91cf\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u3084CPU\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u5b9f\u88c5\u4f9d\u5b58\u306e\u6319\u52d5\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. sizeof\u306f\u5b9f\u884c\u6642\u306b\u8a08\u7b97\u3055\u308c\u308b\u306e\u3067\u3059\u304b\u3001\u305d\u308c\u3068\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u57fa\u672c\u7684\u306b\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u3055\u308c\u3001\u5b9f\u884c\u6642\u306e\u30b3\u30b9\u30c8\u306f\u304b\u304b\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3057\u4f8b\u5916\u3068\u3057\u3066\u3001C99\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u53ef\u5909\u9577\u914d\u5217\uff08VLA\uff09\u306b\u5bfe\u3057\u3066sizeof\u3092\u4f7f\u3046\u5834\u5408\u306f\u3001\u914d\u5217\u30b5\u30a4\u30ba\u304c\u5b9f\u884c\u6642\u306b\u3057\u304b\u6c7a\u307e\u3089\u306a\u3044\u305f\u3081\u3001\u5b9f\u884c\u6642\u306b\u8a55\u4fa1\u3055\u308c\u307e\u3059\u3002\u300c\u5e38\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u300d\u3068\u65ad\u5b9a\u305b\u305a\u3001\u3053\u306e\u4f8b\u5916\u3082\u62bc\u3055\u3048\u3066\u304a\u304f\u3068\u6b63\u78ba\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3084\u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u6c17\u306b\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u306e\u306f\u3069\u3093\u306a\u5834\u9762\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u69cb\u9020\u4f53\u3092\u305d\u306e\u307e\u307e\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3057\u305f\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7d4c\u7531\u3067\u9001\u53d7\u4fe1\u3057\u305f\u308a\u3059\u308b\u5834\u9762\u3067\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u9001\u4fe1\u5074\u3068\u53d7\u4fe1\u5074\u3067\u30b3\u30f3\u30d1\u30a4\u30e9\u3084CPU\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u7570\u306a\u308b\u3068\u3001\u30d1\u30c7\u30a3\u30f3\u30b0\u306e\u5165\u308a\u65b9\u304c\u5909\u308f\u3063\u3066\u69cb\u9020\u4f53\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u4e00\u81f4\u305b\u305a\u3001\u30c7\u30fc\u30bf\u304c\u6b63\u3057\u304f\u8aad\u3081\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u7528\u9014\u3067\u306f\u3001\u660e\u793a\u7684\u306a\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u51e6\u7406\u3092\u66f8\u304f\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. sizeof(arr)\/sizeof(arr[0])\u3067\u8981\u7d20\u6570\u3092\u6c42\u3081\u308b\u65b9\u6cd5\u306f\u3044\u3064\u4f7f\u3048\u306a\u304f\u306a\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u3053\u306e\u8a08\u7b97\u5f0f\u306f\u3001\u914d\u5217\u305d\u306e\u3082\u306e\u306e\u5b9f\u4f53\u304c\u898b\u3048\u3066\u3044\u308b\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u307f\u6b63\u3057\u304f\u6a5f\u80fd\u3057\u307e\u3059\u3002\u914d\u5217\u3092\u95a2\u6570\u306b\u5f15\u6570\u3068\u3057\u3066\u6e21\u3057\u305f\u5834\u5408\u3001\u95a2\u6570\u306e\u5185\u90e8\u3067\u306f\u305d\u306e\u5f15\u6570\u306f\u30dd\u30a4\u30f3\u30bf\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u305f\u3081\u3001\u3053\u306e\u5f0f\u3092\u4f7f\u3046\u3068\u8aa4\u3063\u305f\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002\u914d\u5217\u306e\u5b9f\u4f53\u304c\u3042\u308b\u30b9\u30b3\u30fc\u30d7\uff08\u591a\u304f\u306f\u547c\u3073\u51fa\u3057\u5143\uff09\u3067\u8981\u7d20\u6570\u3092\u8a08\u7b97\u3057\u3001\u5fc5\u8981\u3067\u3042\u308c\u3070\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u95a2\u6570\u306b\u6e21\u3059\u8a2d\u8a08\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7d4c\u55b6\u8005\u304c\u3053\u3046\u3057\u305f\u6280\u8853\u7684\u306a\u4ed5\u69d8\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u7d30\u90e8\u3092\u6697\u8a18\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3057\u300c\u914d\u5217\u3068\u30dd\u30a4\u30f3\u30bf\u306f\u5225\u7269\u300d\u300c\u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u306f\u5358\u7d14\u5408\u8a08\u306b\u306a\u3089\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u300d\u3068\u3044\u3063\u305f\u3001\u7d30\u304b\u3044\u4ed5\u69d8\u306e\u6b63\u78ba\u6027\u304c\u30b7\u30b9\u30c6\u30e0\u306e\u54c1\u8cea\u3092\u5de6\u53f3\u3059\u308b\u3068\u3044\u3046\u611f\u899a\u3092\u6301\u3063\u3066\u304a\u304f\u3053\u3068\u306f\u3001\u958b\u767a\u3092\u4f9d\u983c\u3057\u305f\u308aAI\u306e\u63d0\u6848\u3092\u8a55\u4fa1\u3057\u305f\u308a\u3059\u308b\u969b\u306e\u5224\u65ad\u6750\u6599\u3068\u3057\u3066\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Claude Code\u306fC\u8a00\u8a9e\u306e\u3088\u3046\u306a\u4f4e\u30ec\u30d9\u30eb\u306a\u30b3\u30fc\u30c9\u3082\u6b63\u78ba\u306b\u66f8\u3051\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. 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