{"id":18389,"date":"2026-07-19T03:33:52","date_gmt":"2026-07-18T18:33:52","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=18389"},"modified":"2026-07-19T03:33:52","modified_gmt":"2026-07-18T18:33:52","slug":"cc-c-switch-case","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-c-switch-case\/","title":{"rendered":"\u30102026\u5e747\u6708\u6700\u65b0\u3011C\u8a00\u8a9e\u306eswitch-case\u6587\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u57fa\u672c\u69cb\u6587\u30fbdefault\u306e\u4f7f\u3044\u65b9\u30fbenum\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u30b3\u30fc\u30c9\u4f8b\u4ed8\u304d\u3067\u89e3\u8aac"},"content":{"rendered":"<p>C\u8a00\u8a9e\u3092\u5b66\u7fd2\u3057\u3066\u3044\u308b\u3068\u3001\u5fc5\u305a\u3068\u3044\u3063\u3066\u3044\u3044\u307b\u3069\u767b\u5834\u3059\u308b\u306e\u304c<strong>switch-case\u6587<\/strong>\u3067\u3059\u3002\u8907\u6570\u306e\u6761\u4ef6\u306b\u3088\u3063\u3066\u51e6\u7406\u3092\u5206\u5c90\u3055\u305b\u308b\u969b\u306b\u3001if-else\u6587\u306e\u4ee3\u308f\u308a\u3068\u3057\u3066\u4f7f\u308f\u308c\u308b\u69cb\u6587\u3067\u3059\u304c\u3001\u300c\u306a\u3093\u3068\u306a\u304f\u66f8\u3051\u308b\u3051\u3069\u3001\u672c\u5f53\u306b\u7406\u89e3\u3067\u304d\u3066\u3044\u308b\u304b\u81ea\u4fe1\u304c\u306a\u3044\u300d\u3068\u3044\u3046\u65b9\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001C\u8a00\u8a9e\u306eswitch-case\u6587\u306b\u3064\u3044\u3066\u3001<strong>\u57fa\u672c\u69cb\u6587\u304b\u3089\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067<\/strong>\u3092\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3068\u3068\u3082\u306b\u4e01\u5be7\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u521d\u5fc3\u8005\u306e\u65b9\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u3001if-else\u3068\u306e\u6bd4\u8f03\u3084\u5177\u4f53\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u4ea4\u3048\u306a\u304c\u3089\u8aac\u660e\u3057\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u6700\u5f8c\u307e\u3067\u8aad\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<p>\u7279\u306b\u3001<strong>break\u3092\u66f8\u304d\u5fd8\u308c\u305f\u5834\u5408\u306efall-through\u52d5\u4f5c<\/strong>\u3084\u3001<strong>enum\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/strong>\u306f\u3001\u73fe\u5834\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u8aa4\u89e3\u3057\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001switch-case\u6587\u306b\u307e\u3064\u308f\u308b\u7591\u554f\u3092\u3059\u3079\u3066\u89e3\u6d88\u3067\u304d\u307e\u3059\u3002<\/p>\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\">switch-case\u6587\u306fC\u8a00\u8a9e\u306e\u6761\u4ef6\u5206\u5c90\u306e\u8981\u3067\u3059\u3002if-else\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u306a\u308b\u5834\u9762\u304c\u591a\u304f\u3001\u7d44\u307f\u8fbc\u307f\u7cfb\u3084\u30b2\u30fc\u30e0\u958b\u767a\u3067\u3082\u983b\u7e41\u306b\u767b\u5834\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u4e00\u6c17\u306b\u30de\u30b9\u30bf\u30fc\u3057\u307e\u3057\u3087\u3046\uff01<\/div>\n<\/div>\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068\u3092\u4ee5\u4e0b\u306b\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n\n<ul style=\"list-style:none;padding:0;margin:16px 0\"><li style=\"margin-bottom:8px\"><span style=\"color:#e74c3c;margin-right:8px\">\u2713<\/span>switch-case\u6587\u306e\u57fa\u672c\u69cb\u6587\u3068\u52d5\u4f5c\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3067\u304d\u308b<\/li><li style=\"margin-bottom:8px\"><span style=\"color:#e74c3c;margin-right:8px\">\u2713<\/span>default\u53e5\u3084break\u6587\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u3068\u5f79\u5272\u304c\u308f\u304b\u308b<\/li><li style=\"margin-bottom:8px\"><span style=\"color:#e74c3c;margin-right:8px\">\u2713<\/span>fall-through\uff08\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\uff09\u306e\u52d5\u4f5c\u539f\u7406\u3068\u6d3b\u7528\u6cd5\u30fb\u6ce8\u610f\u70b9\u3092\u7fd2\u5f97\u3067\u304d\u308b<\/li><li style=\"margin-bottom:8px\"><span style=\"color:#e74c3c;margin-right:8px\">\u2713<\/span>\u8907\u6570case\u3092\u307e\u3068\u3081\u308b\u66f8\u304d\u65b9\u3067\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3067\u304d\u308b<\/li><li style=\"margin-bottom:8px\"><span style=\"color:#e74c3c;margin-right:8px\">\u2713<\/span>enum\u3068switch-case\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u5b9f\u8df5\u7684\u306a\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u899a\u3048\u3089\u308c\u308b<\/li><li style=\"margin-bottom:8px\"><span style=\"color:#e74c3c;margin-right:8px\">\u2713<\/span>if-else\u3068switch-case\u306e\u4f7f\u3044\u5206\u3051\u57fa\u6e96\u3092\u8eab\u306b\u3064\u3051\u3089\u308c\u308b<\/li><\/ul>\n\n<h2>switch-case\u6587\u3068\u306f\uff5cif-else\u3068\u306e\u6bd4\u8f03\u3067\u7406\u89e3\u3059\u308b<\/h2>\n\n<p>switch-case\u6587\u306f\u3001<strong>\u4e00\u3064\u306e\u5909\u6570\u3084\u5f0f\u306e\u5024\u306b\u3088\u3063\u3066\u51e6\u7406\u3092\u8907\u6570\u306e\u5206\u5c90\u306b\u632f\u308a\u5206\u3051\u308b<\/strong>\u305f\u3081\u306e\u5236\u5fa1\u69cb\u6587\u3067\u3059\u3002\u82f1\u8a9e\u3067\u8a00\u3048\u3070\u300c\u30b9\u30a4\u30c3\u30c1\uff08\u5207\u308a\u66ff\u3048\uff09\u300d\u3068\u3044\u3046\u540d\u524d\u304c\u793a\u3059\u3068\u304a\u308a\u3001\u5024\u306b\u5fdc\u3058\u3066\u51e6\u7406\u3092\u5207\u308a\u66ff\u3048\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n\n<p>\u305f\u3068\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u5165\u529b\u3057\u305f\u6570\u5024\u306b\u3088\u3063\u3066\u30e1\u30cb\u30e5\u30fc\u753b\u9762\u306e\u51e6\u7406\u3092\u5207\u308a\u66ff\u3048\u305f\u3044\u5834\u5408\u3001if-else\u3092\u4f7f\u3046\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>\/* if-else \u3092\u4f7f\u3063\u305f\u5834\u5408 *\/\nif (menu == 1) {\n    printf(\"\u65b0\u898f\u4f5c\u6210\\n\");\n} else if (menu == 2) {\n    printf(\"\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\\n\");\n} else if (menu == 3) {\n    printf(\"\u4e0a\u66f8\u304d\u4fdd\u5b58\\n\");\n} else if (menu == 4) {\n    printf(\"\u7d42\u4e86\\n\");\n} else {\n    printf(\"\u7121\u52b9\u306a\u9078\u629e\u3067\u3059\\n\");\n}<\/code><\/pre>\n\n<p>\u540c\u3058\u51e6\u7406\u3092switch-case\u6587\u3067\u66f8\u304d\u76f4\u3059\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u3063\u304d\u308a\u3057\u307e\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>\/* switch-case \u3092\u4f7f\u3063\u305f\u5834\u5408 *\/\nswitch (menu) {\n    case 1:\n        printf(\"\u65b0\u898f\u4f5c\u6210\\n\");\n        break;\n    case 2:\n        printf(\"\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\\n\");\n        break;\n    case 3:\n        printf(\"\u4e0a\u66f8\u304d\u4fdd\u5b58\\n\");\n        break;\n    case 4:\n        printf(\"\u7d42\u4e86\\n\");\n        break;\n    default:\n        printf(\"\u7121\u52b9\u306a\u9078\u629e\u3067\u3059\\n\");\n        break;\n}<\/code><\/pre>\n\n<p>if-else\u7248\u3068\u6bd4\u8f03\u3059\u308b\u3068\u3001<strong>switch-case\u7248\u306e\u307b\u3046\u304c\u69cb\u9020\u304c\u4e00\u76ee\u3067\u308f\u304b\u308a\u3084\u3059\u3044<\/strong>\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u7279\u306b\u5206\u5c90\u306e\u6570\u304c\u591a\u304f\u306a\u308c\u3070\u306a\u308b\u307b\u3069\u3001switch-case\u306e\u53ef\u8aad\u6027\u306e\u512a\u4f4d\u6027\u304c\u969b\u7acb\u3063\u3066\u304d\u307e\u3059\u3002<\/p>\n\n<p>\u305f\u3060\u3057\u3001switch-case\u6587\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u5236\u7d04\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u3082\u91cd\u8981\u306a\u5236\u7d04\u306f\u3001<strong>\u6bd4\u8f03\u3067\u304d\u308b\u306e\u306f\u6574\u6570\u578b\uff08int\u3001char\u3001enum\u7b49\uff09\u306e\u5024\u306e\u307f<\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002float\u578b\u306e\u5909\u6570\u3084\u6587\u5b57\u5217\uff08char\u914d\u5217\uff09\u3092\u76f4\u63a5switch\u306e\u6761\u4ef6\u5f0f\u306b\u4f7f\u3046\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u5236\u7d04\u3092\u77e5\u3089\u305a\u306b\u4f7f\u304a\u3046\u3068\u3057\u3066\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u521d\u5fc3\u8005\u306f\u975e\u5e38\u306b\u591a\u3044\u306e\u3067\u3001\u6700\u521d\u306b\u628a\u63e1\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002<\/p>\n\n<p>\u307e\u305f\u3001case\u306b\u6307\u5b9a\u3067\u304d\u308b\u5024\u306f<strong>\u5b9a\u6570\u5f0f<\/strong>\uff08\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u5024\u304c\u6c7a\u307e\u308b\u3082\u306e\uff09\u306b\u9650\u3089\u308c\u307e\u3059\u3002\u5909\u6570\u3092case\u30e9\u30d9\u30eb\u306b\u4f7f\u3046\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u70b9\u3082if-else\u3068\u306e\u5927\u304d\u306a\u9055\u3044\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n\n<div style=\"border-left:4px solid #95a5a6;padding:12px 16px;margin:20px 0;background:#f8f9fa\"><p style=\"font-weight:bold;margin:0 0 6px\">\ud83d\udcd6 \u7528\u8a9e\u89e3\u8aac: switch\u6587<\/p><p style=\"margin:0;color:#555\">C\u8a00\u8a9e\u306b\u304a\u3044\u3066\u3001\u4e00\u3064\u306e\u5f0f\u306e\u5024\u3092\u8907\u6570\u306ecase\u5b9a\u6570\u3068\u7167\u5408\u3057\u3001\u4e00\u81f4\u3057\u305fcase\u30e9\u30d9\u30eb\u304b\u3089\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u5236\u5fa1\u69cb\u6587\u3002\u6574\u6570\u578b\u30fb\u6587\u5b57\u578b\u30fbenum\u578b\u306e\u5024\u306b\u5bfe\u3057\u3066\u4f7f\u7528\u3067\u304d\u3001\u591a\u5206\u5c90\u51e6\u7406\u3092if-else\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u8a18\u8ff0\u3067\u304d\u308b\u3002<\/p><\/div>\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\">switch\u6587\u304c\u4f7f\u3048\u308b\u306e\u306f\u6574\u6570\u578b\u3060\u3051\u306a\u3093\u3067\u3059\u304b\uff1f\u6587\u5b57\u5217\u3067\u6761\u4ef6\u5206\u5c90\u3057\u305f\u3044\u5834\u5408\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/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\">\u6587\u5b57\u5217\u3092\u4f7f\u3044\u305f\u3044\u5834\u5408\u306fif-else\u3068strcmp()\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u57fa\u672c\u3067\u3059\u3002\u307e\u305f\u306f\u3001\u6587\u5b57\u5217\u3092enum\u3084\u6574\u6570\u5024\u306b\u5909\u63db\u3057\u3066\u304b\u3089switch\u306b\u6e21\u3059\u65b9\u6cd5\u3082\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002C\u8a00\u8a9e\u306eswitch\u306f\u6574\u6570\u6bd4\u8f03\u306b\u7279\u5316\u3057\u305f\u69cb\u6587\u3068\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>switch-case\u6587\u306e\u57fa\u672c\u69cb\u6587\u3068\u66f8\u304d\u65b9\uff5c\u30b5\u30a4\u30b3\u30ed\u5224\u5b9a\u3067\u5b66\u3076<\/h2>\n\n<p>switch-case\u6587\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3092\u6539\u3081\u3066\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002\u69cb\u6587\u306e\u5f62\u5f0f\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>switch (\u5f0f) {\n    case \u5b9a\u65701:\n        \/* \u5f0f\u306e\u5024\u304c\u5b9a\u65701\u3068\u4e00\u81f4\u3057\u305f\u3068\u304d\u306e\u51e6\u7406 *\/\n        break;\n    case \u5b9a\u65702:\n        \/* \u5f0f\u306e\u5024\u304c\u5b9a\u65702\u3068\u4e00\u81f4\u3057\u305f\u3068\u304d\u306e\u51e6\u7406 *\/\n        break;\n    \/* ... \u5fc5\u8981\u306a\u6570\u3060\u3051case\u3092\u8ffd\u52a0 ... *\/\n    default:\n        \/* \u3069\u306ecase\u306b\u3082\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u3068\u304d\u306e\u51e6\u7406 *\/\n        break;\n}<\/code><\/pre>\n\n<p>\u69cb\u6587\u306e\u5404\u30d1\u30fc\u30c4\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n<ul style=\"margin:16px 0;padding-left:24px\"><li style=\"margin-bottom:12px\"><strong>switch ( \u5f0f )<\/strong>\uff1a\u62ec\u5f27\u306e\u4e2d\u306b\u6761\u4ef6\u5224\u5b9a\u306e\u5143\u3068\u306a\u308b\u5909\u6570\u3084\u5f0f\u3092\u66f8\u304d\u307e\u3059\u3002\u3053\u306e\u5f0f\u306e\u5024\u306b\u3088\u3063\u3066\u3001\u3069\u306ecase\u30e9\u30d9\u30eb\u306b\u98db\u3076\u304b\u304c\u6c7a\u307e\u308a\u307e\u3059\u3002<\/li><li style=\"margin-bottom:12px\"><strong>case \u5b9a\u6570:<\/strong>\uff1a\u30b3\u30ed\u30f3\uff08:\uff09\u3067\u7d42\u308f\u308b\u30e9\u30d9\u30eb\u3067\u3059\u3002switch\u306e\u5f0f\u304c\u5b9a\u6570\u3068\u4e00\u81f4\u3057\u305f\u3068\u304d\u3001\u3053\u306e\u30e9\u30d9\u30eb\u4ee5\u964d\u306e\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/li><li style=\"margin-bottom:12px\"><strong>break;<\/strong>\uff1aswitch\u6587\u306e\u30d6\u30ed\u30c3\u30af\u3092\u629c\u3051\u51fa\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u66f8\u304b\u306a\u3044\u3068\u3001\u6b21\u306ecase\u306e\u51e6\u7406\u3082\u7d9a\u3051\u3066\u5b9f\u884c\u3055\u308c\u307e\u3059\uff08fall-through\uff09\u3002<\/li><li style=\"margin-bottom:12px\"><strong>default:<\/strong>\uff1a\u3069\u306ecase\u306b\u3082\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\u3092\u66f8\u304d\u307e\u3059\u3002\u7701\u7565\u53ef\u80fd\u3067\u3059\u304c\u3001\u66f8\u3044\u3066\u304a\u304f\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/li><\/ul>\n\n<p>\u5b9f\u969b\u306b\u30b5\u30a4\u30b3\u30ed\uff081\u301c6\u306e\u76ee\uff09\u306e\u5224\u5b9a\u3092\u4f8b\u306b\u3057\u3066\u3001\u57fa\u672c\u7684\u306aswitch-case\u6587\u3092\u66f8\u3044\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int dice = 3;  \/* \u30b5\u30a4\u30b3\u30ed\u306e\u76ee\uff081\u301c6\uff09 *\/\n\n    switch (dice) {\n        case 1:\n            printf(\"\u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f1\u3067\u3059\u3002\u6700\u5c0f\u5024\uff01\\n\");\n            break;\n        case 2:\n            printf(\"\u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f2\u3067\u3059\u3002\\n\");\n            break;\n        case 3:\n            printf(\"\u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f3\u3067\u3059\u3002\\n\");\n            break;\n        case 4:\n            printf(\"\u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f4\u3067\u3059\u3002\\n\");\n            break;\n        case 5:\n            printf(\"\u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f5\u3067\u3059\u3002\\n\");\n            break;\n        case 6:\n            printf(\"\u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f6\u3067\u3059\u3002\u6700\u5927\u5024\uff01\\n\");\n            break;\n        default:\n            printf(\"\u4e0d\u6b63\u306a\u5024\u3067\u3059\uff081\u301c6\u4ee5\u5916\uff09\u3002\\n\");\n            break;\n    }\n\n    return 0;\n}\n\/* \u51fa\u529b: \u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f3\u3067\u3059\u3002 *\/<\/code><\/pre>\n\n<p>\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u5909\u6570<code>dice<\/code>\u306e\u5024\u304c3\u306a\u306e\u3067\u3001<code>case 3:<\/code>\u306b\u30de\u30c3\u30c1\u3057\u3066\u300c\u30b5\u30a4\u30b3\u30ed\u306e\u76ee\u306f3\u3067\u3059\u3002\u300d\u3068\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c<code>break;<\/code>\u3067switch\u6587\u5168\u4f53\u3092\u629c\u3051\u3066\u3001<code>return 0;<\/code>\u306b\u9032\u307f\u307e\u3059\u3002<\/p>\n\n<p>switch\u6587\u306e\u52d5\u4f5c\u3092\u56f3\u89e3\u3059\u308b\u3068\u3001<strong>\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u4e0a\u304b\u3089case\u5b9a\u6570\u3092\u9806\u756a\u306b\u7167\u5408\u3057\u3066\u3044\u304d\u3001\u4e00\u81f4\u3057\u305f\u30e9\u30d9\u30eb\u306b\u30b8\u30e3\u30f3\u30d7\u3057\u3066\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b<\/strong>\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\u4e00\u81f4\u3059\u308bcase\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306fdefault\u306b\u30b8\u30e3\u30f3\u30d7\u3057\u307e\u3059\u3002<\/p>\n\n<p>\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001<strong>case\u30e9\u30d9\u30eb\u306e\u9806\u756a\u306f\u5b9f\u884c\u7d50\u679c\u306b\u5f71\u97ff\u3057\u307e\u305b\u3093<\/strong>\u3002case 3\u3092case 1\u3088\u308a\u524d\u306b\u66f8\u3044\u3066\u3082\u52d5\u4f5c\u306f\u540c\u3058\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u53ef\u8aad\u6027\u306e\u305f\u3081\u306b\u6607\u9806\u3084\u610f\u5473\u306e\u3042\u308b\u9806\u756a\u3067\u4e26\u3079\u308b\u3053\u3068\u304c\u6163\u7fd2\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\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\">\u30b5\u30a4\u30b3\u30ed\u5224\u5b9a\u306e\u3088\u3046\u306a\u300c\u5024\u304c\u660e\u78ba\u306b\u6c7a\u307e\u3063\u3066\u3044\u308b\u6574\u6570\u306e\u591a\u5206\u5c90\u300d\u3053\u305dswitch-case\u306e\u771f\u9aa8\u9802\u3067\u3059\u3002if-else\u3067\u540c\u3058\u3053\u3068\u3092\u66f8\u304f\u3068\u5197\u9577\u306b\u306a\u308a\u304c\u3061\u306a\u306e\u3067\u3001\u3053\u3046\u3044\u3046\u30b1\u30fc\u30b9\u3067\u306f\u7a4d\u6975\u7684\u306bswitch-case\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/div>\n<\/div>\n\n\n<div style=\"border:2px solid #27ae60;border-radius:6px;padding:16px 20px;margin:24px 0;background:#f0fff4\"><p style=\"font-weight:bold;color:#27ae60;margin:0 0 8px\">\ud83d\udca1 case\u306e\u5f8c\u306b\u8907\u6570\u306e\u51e6\u7406\u3092\u66f8\u304f<\/p><p style=\"margin:0\">\u4e00\u3064\u306ecase\u30d6\u30ed\u30c3\u30af\u306b\u306f\u8907\u6570\u306e\u6587\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6ce2\u62ec\u5f27{}\u3067\u56f2\u3080\u5fc5\u8981\u306f\u306a\u304f\u3001break\u307e\u3067\u306e\u51e6\u7406\u304c\u3059\u3079\u3066\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u8907\u96d1\u306a\u51e6\u7406\u3092\u884c\u3046\u5834\u5408\u306f\u95a2\u6570\u306b\u5207\u308a\u51fa\u3059\u3068\u53ef\u8aad\u6027\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002<\/p><\/div>\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>default\u53e5\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\uff5c\u7701\u7565\u6642\u306e\u30ea\u30b9\u30af\u3068\u8a2d\u8a08\u6307\u91dd<\/h2>\n\n<p>switch-case\u6587\u306e<code>default:<\/code>\u53e5\u306f\u3001\u3069\u306ecase\u306b\u3082\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u30d6\u30ed\u30c3\u30af\u3067\u3059\u3002\u69cb\u6587\u4e0a\u306f\u7701\u7565\u53ef\u80fd\u3067\u3059\u304c\u3001<strong>\u5b9f\u52d9\u3067\u306f\u5fc5\u305a\u66f8\u304f\u3053\u3068\u304c\u5f37\u304f\u63a8\u5968<\/strong>\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u7406\u7531\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<p>default\u3092\u7701\u7565\u3059\u308b\u3068\u3001\u60f3\u5b9a\u5916\u306e\u5024\u304c\u5165\u529b\u3055\u308c\u305f\u3068\u304d\u3001switch\u6587\u5168\u4f53\u304c\u4f55\u3082\u305b\u305a\u306b\u30b9\u30ad\u30c3\u30d7\u3055\u308c\u307e\u3059\u3002\u30c7\u30d0\u30c3\u30b0\u4e2d\u306f\u3053\u306e\u300c\u7121\u97f3\u306e\u5931\u6557\u300d\u304c\u975e\u5e38\u306b\u767a\u898b\u3057\u306b\u304f\u3044\u30d0\u30b0\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306a\u30b1\u30fc\u30b9\u3092\u8003\u3048\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int score = 95;  \/* \u30c6\u30b9\u30c8\u306e\u70b9\u6570 *\/\n    char grade;\n\n    \/* default\u306a\u3057\u306eswitch-case\uff08\u5371\u967a\u306a\u4f8b\uff09 *\/\n    switch (score \/ 10) {\n        case 10:\n        case 9:\n            grade = 'A';\n            break;\n        case 8:\n            grade = 'B';\n            break;\n        case 7:\n            grade = 'C';\n            break;\n        case 6:\n            grade = 'D';\n            break;\n        \/* 60\u70b9\u672a\u6e80\uff08case 0\u301c5\uff09\u306ecase\u304c\u306a\u3044\uff01 *\/\n        \/* default\u3082\u306a\u3044\uff01 *\/\n    }\n\n    \/* grade\u304c\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b *\/\n    printf(\"\u6210\u7e3e: %c\\n\", grade);  \/* \u672a\u5b9a\u7fa9\u52d5\u4f5c\u306e\u5371\u967a *\/\n\n    return 0;\n}<\/code><\/pre>\n\n<p>\u4e0a\u306e\u30b3\u30fc\u30c9\u3067\u306f\u300160\u70b9\u672a\u6e80\u306escore\u304c\u6765\u305f\u5834\u5408\u306bgrade\u304c\u521d\u671f\u5316\u3055\u308c\u306a\u3044\u307e\u307e\u4f7f\u308f\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f<strong>\u672a\u5b9a\u7fa9\u52d5\u4f5c\uff08Undefined Behavior\uff09<\/strong>\u3092\u5f15\u304d\u8d77\u3053\u3059\u5371\u967a\u306a\u30b3\u30fc\u30c9\u3067\u3059\u3002default\u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u3001\u3053\u306e\u30ea\u30b9\u30af\u3092\u7c21\u5358\u306b\u6392\u9664\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int score = 45;  \/* \u30c6\u30b9\u30c8\u306e\u70b9\u6570 *\/\n    char grade;\n\n    \/* default\u3042\u308a\u306eswitch-case\uff08\u6b63\u3057\u3044\u4f8b\uff09 *\/\n    switch (score \/ 10) {\n        case 10:\n        case 9:\n            grade = 'A';\n            break;\n        case 8:\n            grade = 'B';\n            break;\n        case 7:\n            grade = 'C';\n            break;\n        case 6:\n            grade = 'D';\n            break;\n        default:\n            \/* 60\u70b9\u672a\u6e80\u3001\u307e\u305f\u306f\u60f3\u5b9a\u5916\u306e\u5024 *\/\n            grade = 'F';\n            break;\n    }\n\n    printf(\"\u6210\u7e3e: %c\\n\", grade);  \/* \u51fa\u529b: \u6210\u7e3e: F *\/\n\n    return 0;\n}<\/code><\/pre>\n\n<p>default\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u300160\u70b9\u672a\u6e80\u306escore\u304c\u6765\u3066\u3082\u78ba\u5b9f\u306b<code>grade = 'F'<\/code>\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u52d5\u4f5c\u304c\u4e88\u6e2c\u53ef\u80fd\u306b\u306a\u308a\u3001\u30c7\u30d0\u30c3\u30b0\u3082\u683c\u6bb5\u306b\u697d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<p>\u307e\u305f\u3001default\u306e\u4f4d\u7f6e\u306b\u3064\u3044\u3066\u306f\u3001<strong>\u6700\u5f8c\u306b\u66f8\u304f\u306e\u304c\u6163\u7fd2<\/strong>\u3067\u3059\u304c\u3001C\u8a00\u8a9e\u306e\u6587\u6cd5\u4e0a\u306f\u3069\u3053\u306b\u66f8\u3044\u3066\u3082\u304b\u307e\u3044\u307e\u305b\u3093\u3002\u5148\u982d\u3084\u4e2d\u9593\u306b\u66f8\u3044\u3066\u3082\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001\u53ef\u8aad\u6027\u306e\u305f\u3081\u306b\u6700\u5f8c\u306b\u66f8\u304f\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u305f\u3060\u3057\u3001<strong>default\u306b\u3082break\u3092\u66f8\u304f\u7fd2\u6163<\/strong>\u3092\u3064\u3051\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\u5c06\u6765\u7684\u306bcase\u3092\u8ffd\u52a0\u3057\u305f\u3068\u304d\u306bfall-through\u304c\u8d77\u304d\u308b\u30ea\u30b9\u30af\u3092\u9632\u3050\u305f\u3081\u3067\u3059\u3002<\/p>\n\n<p>\u7d44\u307f\u8fbc\u307f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3084\u5b89\u5168\u6027\u304c\u6c42\u3081\u3089\u308c\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001MISRA-C\u306a\u3069\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u3067default\u53e5\u306e\u8a18\u8ff0\u304c<strong>\u5fc5\u9808<\/strong>\u3068\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u7fd2\u6163\u3068\u3057\u3066\u5fc5\u305a\u66f8\u304f\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\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\">default\u306f\u5fc5\u305a\u6700\u5f8c\u306b\u66f8\u304b\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3093\u3067\u3059\u304b\uff1f<\/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\">\u6587\u6cd5\u4e0a\u306f\u3069\u3053\u3067\u3082\u66f8\u3051\u307e\u3059\u304c\u3001\u300c\u6700\u5f8c\u306b\u66f8\u304f\u300d\u306e\u304c\u5f37\u3044\u6163\u7fd2\u3067\u3059\u3002\u5148\u982d\u306b\u66f8\u3044\u305f\u5834\u5408\u3082\u3001\u4e00\u81f4\u3059\u308bcase\u304c\u306a\u3044\u3068\u304d\u3060\u3051\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u4eba\u304c\u6df7\u4e71\u3057\u306a\u3044\u3088\u3046\u3001\u7279\u5225\u306a\u7406\u7531\u304c\u306a\u3044\u9650\u308a\u6700\u5f8c\u306b\u7f6e\u304d\u307e\u3057\u3087\u3046\u3002<\/div>\n<\/div>\n\n\n<div style=\"border-left:4px solid #95a5a6;padding:12px 16px;margin:20px 0;background:#f8f9fa\"><p style=\"font-weight:bold;margin:0 0 6px\">\ud83d\udcd6 \u7528\u8a9e\u89e3\u8aac: default\u53e5<\/p><p style=\"margin:0;color:#555\">switch\u6587\u306b\u304a\u3044\u3066\u3001\u3069\u306ecase\u5b9a\u6570\u3068\u3082\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u7279\u5225\u306a\u30e9\u30d9\u30eb\u3002\u7701\u7565\u53ef\u80fd\u3060\u304c\u3001\u60f3\u5b9a\u5916\u306e\u5024\u3078\u306e\u5b89\u5168\u306a\u5bfe\u51e6\u306e\u305f\u3081\u306b\u5fc5\u305a\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u308b\u3002MISRA-C\u306a\u3069\u306e\u5b89\u5168\u6027\u91cd\u8996\u306e\u898f\u7d04\u3067\u306f\u5fc5\u9808\u9805\u76ee\u3068\u3055\u308c\u308b\u3002<\/p><\/div>\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>break\u3068fall-through\u3092\u7406\u89e3\u3059\u308b\uff5c\u30d0\u30b0\u306e\u6e29\u5e8a\u3092\u6b63\u3057\u304f\u628a\u63e1\u3059\u308b<\/h2>\n\n<p>switch-case\u6587\u3092\u6b63\u78ba\u306b\u4f7f\u3044\u3053\u306a\u3059\u3046\u3048\u3067\u3001<strong>\u6700\u3082\u91cd\u8981\u304b\u3064\u8aa4\u89e3\u304c\u591a\u3044\u306e\u304cbreak\u3068fall-through\uff08\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\uff09\u306e\u95a2\u4fc2<\/strong>\u3067\u3059\u3002C\u8a00\u8a9e\u306eswitch\u6587\u306f\u3001case\u306b\u30b8\u30e3\u30f3\u30d7\u3057\u305f\u5f8c\u3001<strong>break\u306b\u51fa\u4f1a\u3046\u307e\u3067\u6b21\u306ecase\u306e\u51e6\u7406\u3082\u7d9a\u3051\u3066\u5b9f\u884c\u3057\u3066\u3057\u307e\u3046<\/strong>\u3068\u3044\u3046\u7279\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<p>\u3053\u308c\u3092\u300c\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\uff08fall-through\uff09\u300d\u3068\u547c\u3073\u307e\u3059\u3002\u6edd\u304b\u3089\u6c34\u304c\u6d41\u308c\u843d\u3061\u308b\u3088\u3046\u306b\u3001\u4e0b\u306ecase\u3078\u3068\u51e6\u7406\u304c\u300c\u6d41\u308c\u843d\u3061\u308b\u300d\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\u610f\u56f3\u305b\u305afall-through\u304c\u8d77\u304d\u308b\u3068\u3001\u4e88\u60f3\u5916\u306e\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u308b\u6df1\u523b\u306a\u30d0\u30b0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int x = 2;\n\n    \/* break\u3092\u5fd8\u308c\u305f\u5371\u967a\u306a\u4f8b *\/\n    switch (x) {\n        case 1:\n            printf(\"case 1\u306e\u51e6\u7406\\n\");\n            \/* break\u304c\u306a\u3044\uff01 \u2192 fall-through *\/\n        case 2:\n            printf(\"case 2\u306e\u51e6\u7406\\n\");\n            \/* break\u304c\u306a\u3044\uff01 \u2192 fall-through *\/\n        case 3:\n            printf(\"case 3\u306e\u51e6\u7406\\n\");\n            \/* break\u304c\u306a\u3044\uff01 \u2192 fall-through *\/\n        case 4:\n            printf(\"case 4\u306e\u51e6\u7406\\n\");\n            break;  \/* \u3053\u3053\u3067\u6b62\u307e\u308b *\/\n        default:\n            printf(\"default\u306e\u51e6\u7406\\n\");\n            break;\n    }\n\n    return 0;\n}\n\/* \u51fa\u529b:\n   case 2\u306e\u51e6\u7406\n   case 3\u306e\u51e6\u7406\n   case 4\u306e\u51e6\u7406\n*\/<\/code><\/pre>\n\n<p>x=2\u306a\u306e\u306b\u3001case 2\u3001case 3\u3001case 4\u306e\u51e6\u7406\u304c\u3059\u3079\u3066\u5b9f\u884c\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u304cfall-through\u3067\u3059\u3002<strong>break\u3092\u66f8\u304d\u5fd8\u308c\u308b\u3068\u3001\u8907\u6570\u306ecase\u30d6\u30ed\u30c3\u30af\u304c\u9023\u9396\u3057\u3066\u5b9f\u884c<\/strong>\u3055\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u3092\u5fc5\u305a\u7406\u89e3\u3057\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<div style=\"border:2px solid #e74c3c;border-radius:6px;padding:16px 20px;margin:24px 0;background:#fff9f9\"><p style=\"font-weight:bold;color:#e74c3c;margin:0 0 8px\">\u26a0\ufe0f break\u306e\u66f8\u304d\u5fd8\u308c\u306f\u91cd\u5927\u30d0\u30b0\u306e\u539f\u56e0<\/p><p style=\"margin:0\">switch-case\u6587\u3067break\u3092\u5fd8\u308c\u308b\u3068\u3001\u6b21\u306ecase\u306e\u51e6\u7406\u304c\u305d\u306e\u307e\u307e\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\uff08fall-through\uff09\u3002\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3053\u306e\u9593\u9055\u3044\u3092\u8b66\u544a\u3057\u306a\u3044\u3053\u3068\u304c\u591a\u304f\u3001\u5b9f\u884c\u6642\u307e\u3067\u6c17\u3065\u304d\u306b\u304f\u3044\u5384\u4ecb\u306a\u30d0\u30b0\u3067\u3059\u3002\u5404case\u306e\u672b\u5c3e\u306b\u306f\u5fc5\u305abreak\u3092\u66f8\u304f\u7fd2\u6163\u3092\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/p><\/div>\n\n<p>\u4e00\u65b9\u3067\u3001<strong>fall-through\u3092\u610f\u56f3\u7684\u306b\u6d3b\u7528\u3059\u308b<\/strong>\u5834\u9762\u3082\u3042\u308a\u307e\u3059\u3002\u8907\u6570\u306ecase\u306b\u540c\u3058\u51e6\u7406\u3092\u3055\u305b\u305f\u3044\u3068\u304d\u306b\u3001break\u306a\u3057\u3067\u9023\u7d9a\u3055\u305b\u308b\u66f8\u304d\u65b9\u306f\u6b63\u898f\u306e\u4f7f\u3044\u65b9\u3067\u3059\uff08\u6b21\u306eH2\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\uff09\u3002\u610f\u56f3\u7684\u306bfall-through\u3092\u4f7f\u3046\u5834\u5408\u306f\u3001\u30b3\u30e1\u30f3\u30c8\u3067\u660e\u793a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int month = 4;  \/* 4\u6708 *\/\n    int days;\n\n    switch (month) {\n        case 1:\n        case 3:\n        case 5:\n        case 7:\n        case 8:\n        case 10:\n        case 12:\n            days = 31;\n            break;\n        case 4:\n        case 6:\n        case 9:\n        case 11:\n            days = 30;\n            break;\n        case 2:\n            days = 28;  \/* \u3046\u308b\u3046\u5e74\u306f\u8003\u616e\u3057\u306a\u3044\u7c21\u7565\u7248 *\/\n            break;\n        default:\n            days = -1;  \/* \u7121\u52b9\u306a\u6708 *\/\n            break;\n    }\n\n    if (days &gt; 0) {\n        printf(\"%d\u6708\u306f%d\u65e5\u3042\u308a\u307e\u3059\u3002\\n\", month, days);\n    } else {\n        printf(\"\u7121\u52b9\u306a\u6708\u3067\u3059\u3002\\n\");\n    }\n\n    return 0;\n}\n\/* \u51fa\u529b: 4\u6708\u306f30\u65e5\u3042\u308a\u307e\u3059\u3002 *\/<\/code><\/pre>\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u8907\u6570\u306ecase\u5b9a\u6570\u306b\u5bfe\u3057\u3066\u540c\u3058\u51e6\u7406\u3092\u3055\u305b\u308b\u5834\u5408\u306f\u3001\u610f\u56f3\u7684\u306afall-through\u3068\u3057\u3066\u7a7a\u306ecase\u30e9\u30d9\u30eb\u3092\u9023\u7d9a\u3055\u305b\u307e\u3059\u3002\u3053\u306e\u66f8\u304d\u65b9\u306fC\u8a00\u8a9e\u3067\u306f\u6b63\u898f\u306e\u66f8\u304d\u65b9\u3067\u3042\u308a\u3001\u975e\u5e38\u306b\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\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\">fall-through\u306f\u30d0\u30b0\u306b\u306a\u308a\u3084\u3059\u3044\u534a\u9762\u3001\u3046\u307e\u304f\u4f7f\u3048\u3070\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3067\u304d\u307e\u3059\u3002\u300c\u610f\u56f3\u7684\u304b\u3069\u3046\u304b\u300d\u3092\u30b3\u30e1\u30f3\u30c8\u3084\u66f8\u304d\u65b9\u3067\u660e\u78ba\u306b\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002GCC\u306a\u3069\u306e\u65b0\u3057\u3044\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u306f\u3001\u610f\u56f3\u7684\u306afall-through\u3092\u30b3\u30e1\u30f3\u30c8`\/* fall through *\/`\u3067\u793a\u3059\u3068\u8b66\u544a\u3092\u6291\u5236\u3067\u304d\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"border-left:4px solid #95a5a6;padding:12px 16px;margin:20px 0;background:#f8f9fa\"><p style=\"font-weight:bold;margin:0 0 6px\">\ud83d\udcd6 \u7528\u8a9e\u89e3\u8aac: fall-through\uff08\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\uff09<\/p><p style=\"margin:0;color:#555\">switch-case\u6587\u306b\u304a\u3044\u3066break\u3092\u66f8\u304b\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u3001\u4e00\u81f4\u3057\u305fcase\u306e\u51e6\u7406\u304c\u7d42\u308f\u3063\u3066\u3082\u6b21\u306ecase\u306e\u51e6\u7406\u304c\u7d9a\u3051\u3066\u5b9f\u884c\u3055\u308c\u308b\u52d5\u4f5c\u306e\u3053\u3068\u3002\u610f\u56f3\u3057\u306a\u3044fall-through\u306f\u6df1\u523b\u306a\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308b\u304c\u3001\u8907\u6570case\u306b\u540c\u4e00\u51e6\u7406\u3092\u3055\u305b\u308b\u5834\u5408\u306b\u306f\u610f\u56f3\u7684\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3082\u3042\u308b\u3002<\/p><\/div>\n\n<div style=\"border-left:4px solid #95a5a6;padding:12px 16px;margin:20px 0;background:#f8f9fa\"><p style=\"font-weight:bold;margin:0 0 6px\">\ud83d\udcd6 \u7528\u8a9e\u89e3\u8aac: break\u6587<\/p><p style=\"margin:0;color:#555\">switch\u6587\u3084\u30eb\u30fc\u30d7\uff08for\/while\/do-while\uff09\u3092\u5373\u5ea7\u306b\u629c\u3051\u51fa\u3059\u305f\u3081\u306e\u6587\u3002switch\u6587\u306ecase\u5185\u3067break\u3092\u4f7f\u3046\u3068\u3001\u305d\u308c\u4ee5\u964d\u306ecase\u3078\u306efall-through\u3092\u9632\u304e\u3001switch\u6587\u5168\u4f53\u306e\u76f4\u5f8c\u306b\u3042\u308b\u6587\u306b\u5236\u5fa1\u3092\u79fb\u3059\u3002<\/p><\/div>\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>\u8907\u6570\u6761\u4ef6\u3092\u307e\u3068\u3081\u308b\u66f8\u304d\u65b9\uff5ccase A: case B: \u306e\u6d3b\u7528\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n<p>\u524d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u5c11\u3057\u89e6\u308c\u307e\u3057\u305f\u304c\u3001<strong>\u8907\u6570\u306ecase\u306b\u5bfe\u3057\u3066\u540c\u3058\u51e6\u7406\u3092\u5b9f\u884c\u3055\u305b\u305f\u3044<\/strong>\u5834\u5408\u306e\u66f8\u304d\u65b9\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u308c\u306fswitch-case\u6587\u306e\u975e\u5e38\u306b\u5b9f\u7528\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3001\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3059\u305f\u3081\u306b\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<p>\u57fa\u672c\u7684\u306a\u8003\u3048\u65b9\u306f\u3001<strong>\u51e6\u7406\u3092\u66f8\u304b\u306a\u3044\uff08\u7a7a\u306e\uff09case\u30e9\u30d9\u30eb\u3092\u9023\u7d9a\u3055\u305b\u308b<\/strong>\u3053\u3068\u3067\u3001fall-through\u3092\u5229\u7528\u3057\u3066\u8907\u6570\u306e\u6761\u4ef6\u3092\u4e00\u3064\u306e\u51e6\u7406\u30d6\u30ed\u30c3\u30af\u306b\u7d50\u3073\u3064\u3051\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int day = 6;  \/* 1=\u6708\u66dc\u65e5, 2=\u706b\u66dc\u65e5, ..., 7=\u65e5\u66dc\u65e5 *\/\n    char *day_type;\n\n    switch (day) {\n        case 1:  \/* \u6708\u66dc\u65e5 *\/\n        case 2:  \/* \u706b\u66dc\u65e5 *\/\n        case 3:  \/* \u6c34\u66dc\u65e5 *\/\n        case 4:  \/* \u6728\u66dc\u65e5 *\/\n        case 5:  \/* \u91d1\u66dc\u65e5 *\/\n            day_type = \"\u5e73\u65e5\";\n            break;\n        case 6:  \/* \u571f\u66dc\u65e5 *\/\n        case 7:  \/* \u65e5\u66dc\u65e5 *\/\n            day_type = \"\u4f11\u65e5\";\n            break;\n        default:\n            day_type = \"\u7121\u52b9\u306a\u5024\";\n            break;\n    }\n\n    printf(\"day=%d \u306f %s \u3067\u3059\u3002\\n\", day, day_type);\n\n    return 0;\n}\n\/* \u51fa\u529b: day=6 \u306f \u4f11\u65e5 \u3067\u3059\u3002 *\/<\/code><\/pre>\n\n<p>day=6\uff08\u571f\u66dc\u65e5\uff09\u306e\u5834\u5408\u3001<code>case 6:<\/code>\u306b\u30b8\u30e3\u30f3\u30d7\u3057\u307e\u3059\u3002case 6\u306b\u306f\u30b3\u30fc\u30c9\u304c\u66f8\u304b\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u3001fall-through\u304c\u767a\u751f\u3057\u3066<code>case 7:<\/code>\u4ee5\u964d\u306e\u51e6\u7406\u3001\u3064\u307e\u308a<code>day_type = \"\u4f11\u65e5\";<\/code>\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8cbreak\u3067switch\u6587\u3092\u629c\u3051\u307e\u3059\u3002<\/p>\n\n<p>\u3053\u306e\u66f8\u304d\u65b9\u306e\u30dd\u30a4\u30f3\u30c8\u306f\u3001<strong>\u300c\u51e6\u7406\u3092\u4f34\u308f\u306a\u3044case\u300d\u306f\u30b3\u30e1\u30f3\u30c8\u3067\u5185\u5bb9\u3092\u660e\u793a\u3059\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002case 6: \u306e\u5f8c\u306b\u4f55\u3082\u30b3\u30fc\u30c9\u304c\u306a\u3044\u306e\u306f\u610f\u56f3\u7684\u306afall-through\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u30b3\u30e1\u30f3\u30c8\u3092\u7701\u304f\u3068\u3001break\u3092\u66f8\u304d\u5fd8\u308c\u305f\u306e\u304b\u610f\u56f3\u7684\u306a\u306e\u304b\u8aad\u307f\u624b\u306b\u308f\u304b\u308a\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<p>\u5225\u306e\u5b9f\u7528\u4f8b\u3068\u3057\u3066\u3001\u82f1\u5c0f\u6587\u5b57\u30fb\u5927\u6587\u5b57\u30fb\u6570\u5b57\u306e\u5224\u5b9a\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    char c = 'A';\n\n    switch (c) {\n        case 'a': case 'e': case 'i': case 'o': case 'u':\n        case 'A': case 'E': case 'I': case 'O': case 'U':\n            printf(\"'%c' \u306f\u6bcd\u97f3\uff08\u82f1\u5b57\uff09\u3067\u3059\u3002\\n\", c);\n            break;\n        case '0': case '1': case '2': case '3': case '4':\n        case '5': case '6': case '7': case '8': case '9':\n            printf(\"'%c' \u306f\u6570\u5b57\u3067\u3059\u3002\\n\", c);\n            break;\n        default:\n            printf(\"'%c' \u306f\u5b50\u97f3\u304b\u3001\u305d\u306e\u4ed6\u306e\u6587\u5b57\u3067\u3059\u3002\\n\", c);\n            break;\n    }\n\n    return 0;\n}\n\/* \u51fa\u529b: 'A' \u306f\u6bcd\u97f3\uff08\u82f1\u5b57\uff09\u3067\u3059\u3002 *\/<\/code><\/pre>\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<strong>\u8907\u6570\u306ecase\u3092\u4e00\u884c\u306b\u6a2a\u4e26\u3073\u3067\u66f8\u304f<\/strong>\u30b9\u30bf\u30a4\u30eb\u3082\u3042\u308a\u307e\u3059\u3002\u7e26\u306b\u4e26\u3079\u308b\u304b\u6a2a\u306b\u4e26\u3079\u308b\u304b\u306f\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u306e\u554f\u984c\u3067\u3059\u304c\u3001\u300c\u540c\u3058\u30ab\u30c6\u30b4\u30ea\u306b\u5c5e\u3059\u308bcase\u7fa4\u300d\u3092\u610f\u5473\u7684\u306b\u8868\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u6a2a\u4e26\u3073\u306b\u3059\u308b\u66f8\u304d\u65b9\u3082\u3088\u304f\u898b\u3089\u308c\u307e\u3059\u3002<\/p>\n\n<p>\u305f\u3060\u3057\u3001case\u3092\u6a2a\u4e26\u3073\u306b\u3057\u3059\u304e\u308b\u30681\u884c\u304c\u9577\u304f\u306a\u308a\u3059\u304e\u3066\u8aad\u307f\u306b\u304f\u304f\u306a\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u30c1\u30fc\u30e0\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306b\u5f93\u3044\u3064\u3064\u3001\u610f\u56f3\u304c\u660e\u78ba\u306b\u4f1d\u308f\u308b\u66f8\u304d\u65b9\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\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\">case \u3092\u305f\u304f\u3055\u3093\u6a2a\u4e26\u3073\u306b\u3059\u308b\u306e\u3068\u7e26\u306b\u4e26\u3079\u308b\u306e\u306f\u3069\u3061\u3089\u304c\u63a8\u5968\u3067\u3059\u304b\uff1f<\/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\">\u4e00\u822c\u7684\u306b\u306f\u7e26\u306b\u4e26\u3079\u308b\u307b\u3046\u304c\u591a\u6570\u6d3e\u3067\u3059\u3002\u53ef\u8aad\u6027\u304c\u9ad8\u304f\u3001\u30b3\u30e1\u30f3\u30c8\u3082\u4ed8\u3051\u3084\u3059\u3044\u305f\u3081\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u6bcd\u97f3\u306e\u3088\u3046\u306b\u30b0\u30eb\u30fc\u30d4\u30f3\u30b0\u304c\u81ea\u660e\u306a\u5834\u5408\u306f\u6a2a\u4e26\u3073\u3082\u8a31\u5bb9\u3055\u308c\u307e\u3059\u3002\u30c1\u30fc\u30e0\u3084\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u898f\u7d04\u306b\u5408\u308f\u305b\u307e\u3057\u3087\u3046\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>enum\u3068switch-case\u306e\u7d44\u307f\u5408\u308f\u305b\uff5c\u66dc\u65e5\u5224\u5b9a\u3067\u5b66\u3076\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n<p>C\u8a00\u8a9e\u306eswitch-case\u6587\u3092\u3088\u308a\u5b9f\u8df5\u7684\u306b\u4f7f\u3046\u305f\u3081\u306e\u91cd\u8981\u30c6\u30af\u30cb\u30c3\u30af\u304c\u3001<strong>enum\uff08\u5217\u6319\u578b\uff09\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong>\u3067\u3059\u3002enum\u3092\u4f7f\u3046\u3068\u3001\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\uff08\u610f\u5473\u306e\u306a\u3044\u6570\u5024\u30ea\u30c6\u30e9\u30eb\uff09\u3092\u306a\u304f\u3057\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<p>\u307e\u305a\u3001enum\u3092\u4f7f\u308f\u306a\u3044\u5834\u5408\u306e\u554f\u984c\u70b9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>\/* enum\u3092\u4f7f\u308f\u306a\u3044\u5834\u5408\uff1a\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\u3060\u3089\u3051\u3067\u8aad\u307f\u306b\u304f\u3044 *\/\nint day = 3;\nswitch (day) {\n    case 0: printf(\"Sunday\\n\");    break;\n    case 1: printf(\"Monday\\n\");    break;\n    case 2: printf(\"Tuesday\\n\");   break;\n    case 3: printf(\"Wednesday\\n\"); break;\n    case 4: printf(\"Thursday\\n\");  break;\n    case 5: printf(\"Friday\\n\");    break;\n    case 6: printf(\"Saturday\\n\");  break;\n}\n\/* day=3 \u304c\u4f55\u66dc\u65e5\u3092\u610f\u5473\u3059\u308b\u306e\u304b\u3001\u5b9a\u7fa9\u3092\u898b\u306a\u3044\u3068\u308f\u304b\u3089\u306a\u3044 *\/<\/code><\/pre>\n\n<p>\u6b21\u306b\u3001enum\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5834\u5408\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\n\/* \u66dc\u65e5\u3092\u8868\u3059enum\u3092\u5b9a\u7fa9 *\/\ntypedef enum {\n    SUNDAY    = 0,\n    MONDAY    = 1,\n    TUESDAY   = 2,\n    WEDNESDAY = 3,\n    THURSDAY  = 4,\n    FRIDAY    = 5,\n    SATURDAY  = 6\n} DayOfWeek;\n\n\/* \u66dc\u65e5\u306b\u5fdc\u3058\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8fd4\u3059\u95a2\u6570 *\/\nvoid print_day_info(DayOfWeek day) {\n    switch (day) {\n        case SUNDAY:\n            printf(\"\u65e5\u66dc\u65e5\uff1a\u9031\u306e\u59cb\u307e\u308a\u3001\u3086\u3063\u304f\u308a\u4f11\u307f\u307e\u3057\u3087\u3046\u3002\\n\");\n            break;\n        case MONDAY:\n            printf(\"\u6708\u66dc\u65e5\uff1a\u9031\u306e\u30b9\u30bf\u30fc\u30c8\u3001\u9811\u5f35\u308a\u307e\u3057\u3087\u3046\uff01\\n\");\n            break;\n        case TUESDAY:\n            printf(\"\u706b\u66dc\u65e5\uff1a\u9031\u306e\u5e8f\u76e4\u3001\u30da\u30fc\u30b9\u914d\u5206\u304c\u5927\u5207\u3067\u3059\u3002\\n\");\n            break;\n        case WEDNESDAY:\n            printf(\"\u6c34\u66dc\u65e5\uff1a\u9031\u306e\u4e2d\u65e5\u3001\u6298\u308a\u8fd4\u3057\u5730\u70b9\u3067\u3059\u3002\\n\");\n            break;\n        case THURSDAY:\n            printf(\"\u6728\u66dc\u65e5\uff1a\u9031\u672b\u304c\u898b\u3048\u3066\u304d\u307e\u3057\u305f\u3002\\n\");\n            break;\n        case FRIDAY:\n            printf(\"\u91d1\u66dc\u65e5\uff1a\u9031\u306e\u6700\u7d42\u65e5\u3001\u3082\u3046\u3072\u3068\u8e0f\u3093\u5f35\u308a\uff01\\n\");\n            break;\n        case SATURDAY:\n            printf(\"\u571f\u66dc\u65e5\uff1a\u9031\u672b\uff01\u601d\u3044\u5207\u308a\u697d\u3057\u307f\u307e\u3057\u3087\u3046\u3002\\n\");\n            break;\n        default:\n            printf(\"\u7121\u52b9\u306a\u66dc\u65e5\u5024\u3067\u3059\u3002\\n\");\n            break;\n    }\n}\n\nint main(void) {\n    DayOfWeek today = WEDNESDAY;\n    print_day_info(today);  \/* \u51fa\u529b: \u6c34\u66dc\u65e5\uff1a\u9031\u306e\u4e2d\u65e5\u3001\u6298\u308a\u8fd4\u3057\u5730\u70b9\u3067\u3059\u3002 *\/\n\n    return 0;\n}<\/code><\/pre>\n\n<p>enum\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001<code>case 3:<\/code>\u3068\u3044\u3046\u610f\u5473\u306e\u308f\u304b\u3089\u306a\u3044\u6570\u5b57\u306e\u4ee3\u308f\u308a\u306b\u3001<code>case WEDNESDAY:<\/code>\u3068\u3044\u3046\u610f\u5473\u306e\u308f\u304b\u308b\u30e9\u30d9\u30eb\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u4eba\u304c\u300c3\u304c\u4f55\u3092\u610f\u5473\u3059\u308b\u304b\u300d\u3092\u5225\u9014\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n<p>\u3055\u3089\u306b\u3001enum\u3068switch-case\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001<strong>\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u300c\u3059\u3079\u3066\u306eenum\u306e\u5024\u304ccase\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u300d\u3092\u8b66\u544a\u3067\u304d\u308b<\/strong>\u3068\u3044\u3046\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\uff08GCC\u306a\u3089<code>-Wswitch<\/code>\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u8b66\u544a\u304c\u51fa\u307e\u3059\uff09\u3002enum\u306b\u65b0\u3057\u3044\u5024\u3092\u8ffd\u52a0\u3057\u305f\u3068\u304d\u3001\u5bfe\u5fdc\u3059\u308bcase\u3092\u66f8\u304d\u5fd8\u308c\u3066\u3082\u8b66\u544a\u3067\u6c17\u3065\u3051\u308b\u306e\u3067\u3059\u3002<\/p>\n\n<div class=\"g-flow-row\" style=\"display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:20px 0;padding:16px;background:#ecf0f1;border-radius:6px\"><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">enum\u5b9a\u7fa9<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">switch(enum\u5909\u6570)<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">case ENUM_VAL:<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">\u51e6\u7406\u5b9f\u884c<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">break<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">\u6b21\u306e\u51e6\u7406\u3078<\/div><\/div>\n\n<p>enum\u3068switch-case\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u30d1\u30bf\u30fc\u30f3\u306f\u3001<strong>\u72b6\u614b\u6a5f\u68b0\uff08\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\uff09\u306e\u5b9f\u88c5<\/strong>\u3067\u3082\u975e\u5e38\u306b\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002\u7d44\u307f\u8fbc\u307f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3084\u30b2\u30fc\u30e0\u306e\u30ad\u30e3\u30e9\u30af\u30bf\u30fcAI\u306a\u3069\u3001\u300c\u73fe\u5728\u306e\u72b6\u614b\u306b\u3088\u3063\u3066\u52d5\u4f5c\u3092\u5207\u308a\u66ff\u3048\u308b\u300d\u51e6\u7406\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\n\/* \u30b2\u30fc\u30e0\u30ad\u30e3\u30e9\u30af\u30bf\u30fc\u306e\u72b6\u614b *\/\ntypedef enum {\n    STATE_IDLE,     \/* \u5f85\u6a5f\u4e2d *\/\n    STATE_WALKING,  \/* \u6b69\u884c\u4e2d *\/\n    STATE_JUMPING,  \/* \u30b8\u30e3\u30f3\u30d7\u4e2d *\/\n    STATE_ATTACKING \/* \u653b\u6483\u4e2d *\/\n} CharacterState;\n\nvoid update_character(CharacterState state) {\n    switch (state) {\n        case STATE_IDLE:\n            printf(\"\u30ad\u30e3\u30e9\u30af\u30bf\u30fc: \u5f85\u6a5f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u518d\u751f\u4e2d\\n\");\n            break;\n        case STATE_WALKING:\n            printf(\"\u30ad\u30e3\u30e9\u30af\u30bf\u30fc: \u6b69\u884c\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u518d\u751f\u4e2d\u3001\u79fb\u52d5\u51e6\u7406\u5b9f\u884c\\n\");\n            break;\n        case STATE_JUMPING:\n            printf(\"\u30ad\u30e3\u30e9\u30af\u30bf\u30fc: \u30b8\u30e3\u30f3\u30d7\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u518d\u751f\u4e2d\u3001\u91cd\u529b\u8a08\u7b97\u5b9f\u884c\\n\");\n            break;\n        case STATE_ATTACKING:\n            printf(\"\u30ad\u30e3\u30e9\u30af\u30bf\u30fc: \u653b\u6483\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u518d\u751f\u4e2d\u3001\u5f53\u305f\u308a\u5224\u5b9a\u30c1\u30a7\u30c3\u30af\\n\");\n            break;\n        default:\n            printf(\"\u672a\u77e5\u306e\u72b6\u614b\u3067\u3059\\n\");\n            break;\n    }\n}\n\nint main(void) {\n    update_character(STATE_JUMPING);\n    \/* \u51fa\u529b: \u30ad\u30e3\u30e9\u30af\u30bf\u30fc: \u30b8\u30e3\u30f3\u30d7\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u518d\u751f\u4e2d\u3001\u91cd\u529b\u8a08\u7b97\u5b9f\u884c *\/\n    return 0;\n}<\/code><\/pre>\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\">enum\u3068switch-case\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001C\u8a00\u8a9e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5b9a\u756a\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\u3059\u3002\u7279\u306b\u72b6\u614b\u6a5f\u68b0\u306e\u5b9f\u88c5\u3067\u306f\u6b20\u304b\u305b\u306a\u3044\u30c6\u30af\u30cb\u30c3\u30af\u306a\u306e\u3067\u3001\u3057\u3063\u304b\u308a\u30de\u30b9\u30bf\u30fc\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/div>\n<\/div>\n\n\n<div style=\"border-left:4px solid #95a5a6;padding:12px 16px;margin:20px 0;background:#f8f9fa\"><p style=\"font-weight:bold;margin:0 0 6px\">\ud83d\udcd6 \u7528\u8a9e\u89e3\u8aac: enum\uff08\u5217\u6319\u578b\uff09<\/p><p style=\"margin:0;color:#555\">C\u8a00\u8a9e\u3067\u6574\u6570\u5b9a\u6570\u306b\u540d\u524d\u3092\u3064\u3051\u3066\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u30c7\u30fc\u30bf\u578b\u3002`typedef enum { ... } \u578b\u540d;` \u3067\u5b9a\u7fa9\u3057\u3001\u30b3\u30fc\u30c9\u5185\u3067\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\u3092\u6392\u9664\u3057\u3066\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u3002switch-case\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3059\u3079\u3066\u306e\u5217\u6319\u5024\u306b\u5bfe\u3059\u308b\u51e6\u7406\u306e\u7db2\u7f85\u6027\u3092\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u30c1\u30a7\u30c3\u30af\u3067\u304d\u308b\u3002<\/p><\/div>\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>\u30eb\u30fc\u30d7\u5185\u3067\u306eswitch-case\u306e\u6319\u52d5\uff5cbreak\u3068continue\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/h2>\n\n<p>switch-case\u6587\u3092for\u6587\u3084while\u6587\u306a\u3069\u306e\u30eb\u30fc\u30d7\u306e\u4e2d\u3067\u4f7f\u3046\u5834\u5408\u3001<strong>break\u306e\u52d5\u4f5c\u306b\u6ce8\u610f\u304c\u5fc5\u8981<\/strong>\u3067\u3059\u3002\u3053\u306e\u70b9\u3092\u8aa4\u89e3\u3057\u3066\u3044\u308b\u521d\u5fc3\u8005\u304c\u975e\u5e38\u306b\u591a\u3044\u305f\u3081\u3001\u3057\u3063\u304b\u308a\u3068\u7406\u89e3\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<p>\u30eb\u30fc\u30d7\u5185\u306eswitch\u6587\u3067break\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001<strong>switch\u6587\u3092\u629c\u3051\u308b\u3060\u3051\u3067\u3001\u30eb\u30fc\u30d7\u306f\u629c\u3051\u307e\u305b\u3093<\/strong>\u3002\u3053\u306e\u52d5\u4f5c\u3092\u77e5\u3089\u306a\u3044\u3068\u3001\u300c\u30eb\u30fc\u30d7\u3092\u7d42\u4e86\u3055\u305b\u305f\u304f\u3066break\u3092\u66f8\u3044\u305f\u306e\u306b\u7d42\u308f\u3089\u306a\u3044\u300d\u3068\u3044\u3046\u72b6\u6cc1\u306b\u9665\u308a\u307e\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int i;\n\n    \/* \u30eb\u30fc\u30d7\u5185\u306eswitch-case *\/\n    for (i = 1; i &lt;= 5; i++) {\n        printf(\"i = %d: \", i);\n\n        switch (i) {\n            case 1:\n                printf(\"1\u756a\uff01\\n\");\n                break;  \/* switch\u3092\u629c\u3051\u308b\u3060\u3051\u3002for\u30eb\u30fc\u30d7\u306f\u7d99\u7d9a\u3059\u308b *\/\n            case 3:\n                printf(\"3\u756a\uff01\\n\");\n                break;  \/* switch\u3092\u629c\u3051\u308b\u3060\u3051\u3002for\u30eb\u30fc\u30d7\u306f\u7d99\u7d9a\u3059\u308b *\/\n            case 5:\n                printf(\"5\u756a\uff01\\n\");\n                break;  \/* switch\u3092\u629c\u3051\u308b\u3060\u3051\u3002for\u30eb\u30fc\u30d7\u306f\u7d99\u7d9a\u3059\u308b *\/\n            default:\n                printf(\"\uff08\u305d\u306e\u4ed6\uff09\\n\");\n                break;\n        }\n        \/* switch\u5f8c\u3082for\u30eb\u30fc\u30d7\u306f i=1,2,3,4,5 \u3068\u7d9a\u304f *\/\n    }\n\n    return 0;\n}\n\/* \u51fa\u529b:\n   i = 1: 1\u756a\uff01\n   i = 2: \uff08\u305d\u306e\u4ed6\uff09\n   i = 3: 3\u756a\uff01\n   i = 4: \uff08\u305d\u306e\u4ed6\uff09\n   i = 5: 5\u756a\uff01\n*\/<\/code><\/pre>\n\n<p>i=1\u306e\u3068\u304dcase 1\u3067break\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u304c\u3001\u3053\u308c\u306fswitch\u6587\u3092\u629c\u3051\u308b\u3060\u3051\u3067\u3059\u3002for\u30eb\u30fc\u30d7\u306f\u7d99\u7d9a\u3057\u3066 i=2, 3, 4, 5 \u3068\u51e6\u7406\u304c\u7d9a\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u610f\u56f3\u3057\u305f\u52d5\u4f5c\u3067\u3059\u3002<\/p>\n\n<p>\u3067\u306f\u3001<strong>\u30eb\u30fc\u30d7\u81ea\u4f53\u3092\u9014\u4e2d\u3067\u629c\u3051\u305f\u3044\u5834\u5408<\/strong>\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u65b9\u6cd5\u306f\u4e3b\u306b3\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int i;\n    int found = 0;  \/* \u30d5\u30e9\u30b0\u5909\u6570 *\/\n\n    \/* \u65b9\u6cd51: \u30d5\u30e9\u30b0\u5909\u6570\u3092\u4f7f\u3063\u3066\u30eb\u30fc\u30d7\u3092\u629c\u3051\u308b *\/\n    for (i = 1; i &lt;= 10; i++) {\n        switch (i % 3) {\n            case 0:\n                printf(\"i=%d: 3\u306e\u500d\u6570\u3092\u767a\u898b\uff01\u30eb\u30fc\u30d7\u7d42\u4e86\\n\", i);\n                found = 1;\n                break;  \/* switch\u3092\u629c\u3051\u308b *\/\n            default:\n                printf(\"i=%d: 3\u306e\u500d\u6570\u3067\u306f\u306a\u3044\\n\", i);\n                break;\n        }\n        if (found) break;  \/* for\u30eb\u30fc\u30d7\u3092\u629c\u3051\u308b *\/\n    }\n\n    printf(\"\\n--- \u65b9\u6cd52: goto\u6587\u3092\u4f7f\u3046\uff08\u9650\u5b9a\u7684\u306a\u4f7f\u7528\uff09 ---\\n\");\n\n    \/* \u65b9\u6cd52: goto\u6587\u3092\u4f7f\u3063\u3066\u30eb\u30fc\u30d7\u3092\u629c\u3051\u308b *\/\n    for (i = 1; i &lt;= 10; i++) {\n        switch (i % 4) {\n            case 0:\n                printf(\"i=%d: 4\u306e\u500d\u6570\u3092\u767a\u898b\uff01\u30eb\u30fc\u30d7\u7d42\u4e86\\n\", i);\n                goto loop_end;  \/* \u30eb\u30fc\u30d7\u5916\u306e\u30e9\u30d9\u30eb\u306b\u30b8\u30e3\u30f3\u30d7 *\/\n            default:\n                printf(\"i=%d: 4\u306e\u500d\u6570\u3067\u306f\u306a\u3044\\n\", i);\n                break;\n        }\n    }\n    loop_end:\n    printf(\"\u30eb\u30fc\u30d7\u7d42\u4e86\\n\");\n\n    return 0;\n}<\/code><\/pre>\n\n<div style=\"border:2px solid #e74c3c;border-radius:6px;padding:16px 20px;margin:24px 0;background:#fff9f9\"><p style=\"font-weight:bold;color:#e74c3c;margin:0 0 8px\">\u26a0\ufe0f \u30eb\u30fc\u30d7\u5185\u306ebreak\u306fswitch\u3057\u304b\u629c\u3051\u306a\u3044<\/p><p style=\"margin:0\">switch\u6587\u5185\u3067break\u3092\u5b9f\u884c\u3057\u3066\u3082\u3001\u5916\u5074\u306efor\/while\/do-while\u30eb\u30fc\u30d7\u306f\u7d99\u7d9a\u3057\u307e\u3059\u3002\u30eb\u30fc\u30d7\u3092\u5f37\u5236\u7d42\u4e86\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30d5\u30e9\u30b0\u5909\u6570\u3092\u4f7f\u3063\u3066\u30eb\u30fc\u30d7\u306e\u6761\u4ef6\u5224\u5b9a\u3067break\u3059\u308b\u304b\u3001goto\u6587\uff08\u614e\u91cd\u306b\uff09\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u6319\u52d5\u3092\u8aa4\u89e3\u3059\u308b\u3068\u7121\u9650\u30eb\u30fc\u30d7\u306a\u3069\u306e\u30d0\u30b0\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p><\/div>\n\n<p>\u307e\u305f\u3001<strong>continue\u6587<\/strong>\u306fswitch\u6587\u306e\u5185\u5074\u3067\u306f\u7279\u5225\u306a\u610f\u5473\u3092\u6301\u3061\u307e\u305b\u3093\u3002switch\u5185\u3067continue\u3092\u66f8\u304f\u3068\u3001switch\u6587\u3067\u306f\u306a\u304f<strong>\u5916\u5074\u306e\u30eb\u30fc\u30d7\u306econtinue<\/strong>\u3068\u3057\u3066\u52d5\u4f5c\u3057\u307e\u3059\u3002\u3053\u308c\u306fbreak\u3068\u306f\u9006\u306e\u52d5\u4f5c\u3067\u3001\u300ccontinue\u306fswitch\u3092\u98db\u3073\u8d8a\u3048\u3066\u30eb\u30fc\u30d7\u306e\u6b21\u306e\u53cd\u5fa9\u306b\u9032\u3080\u300d\u3068\u3044\u3046\u70b9\u3092\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int i;\n\n    \/* switch\u5185\u306econtinue\u306ffor\u30eb\u30fc\u30d7\u306b\u4f5c\u7528\u3059\u308b *\/\n    for (i = 1; i &lt;= 5; i++) {\n        switch (i) {\n            case 3:\n                printf(\"i=3\u306f\u30b9\u30ad\u30c3\u30d7\\n\");\n                continue;  \/* for\u30eb\u30fc\u30d7\u306e\u6b21\u306e\u53cd\u5fa9\u3078\uff08i=4\u3078\uff09 *\/\n            default:\n                printf(\"i=%d: \u901a\u5e38\u51e6\u7406\\n\", i);\n                break;\n        }\n        printf(\"  i=%d\u306e\u5f8c\u51e6\u7406\\n\", i);  \/* i=3\u306e\u3068\u304d\u306f\u3053\u3053\u306b\u6765\u306a\u3044 *\/\n    }\n\n    return 0;\n}\n\/* \u51fa\u529b:\n   i=1: \u901a\u5e38\u51e6\u7406\n     i=1\u306e\u5f8c\u51e6\u7406\n   i=2: \u901a\u5e38\u51e6\u7406\n     i=2\u306e\u5f8c\u51e6\u7406\n   i=3\u306f\u30b9\u30ad\u30c3\u30d7          \u2190 continue\u3067for\u30eb\u30fc\u30d7\u306e\u6b21\u306e\u53cd\u5fa9\u3078\n   i=4: \u901a\u5e38\u51e6\u7406\n     i=4\u306e\u5f8c\u51e6\u7406\n   i=5: \u901a\u5e38\u51e6\u7406\n     i=5\u306e\u5f8c\u51e6\u7406\n*\/<\/code><\/pre>\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\">switch\u5185\u3067continue\u3092\u4f7f\u3046\u3068for\u30eb\u30fc\u30d7\u306b\u52b9\u304f\u3093\u3067\u3059\u304b\u3002break\u3068continue\u3067\u52d5\u4f5c\u304c\u9055\u3046\u306e\u306f\u521d\u3081\u3066\u77e5\u308a\u307e\u3057\u305f\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\">\u305d\u3046\u3067\u3059\u3001\u3053\u308c\u306f\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002break\u306fswitch\u6587\u3092\u629c\u3051\u307e\u3059\u304c\u3001continue\u306fswitch\u6587\u3092\u300c\u7d20\u901a\u308a\u300d\u3057\u3066\u5916\u5074\u306e\u30eb\u30fc\u30d7\u306b\u4f5c\u7528\u3057\u307e\u3059\u3002\u6df7\u4e71\u3057\u3084\u3059\u3044\u306e\u3067\u3001\u30b3\u30e1\u30f3\u30c8\u3092\u4ed8\u3051\u3066\u610f\u56f3\u3092\u660e\u793a\u3059\u308b\u3053\u3068\u3092\u5f37\u304f\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"border-left:4px solid #95a5a6;padding:12px 16px;margin:20px 0;background:#f8f9fa\"><p style=\"font-weight:bold;margin:0 0 6px\">\ud83d\udcd6 \u7528\u8a9e\u89e3\u8aac: \u6761\u4ef6\u5206\u5c90<\/p><p style=\"margin:0;color:#555\">\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u306b\u304a\u3044\u3066\u3001\u6761\u4ef6\u306e\u771f\u507d\u3084\u5024\u306b\u3088\u3063\u3066\u5b9f\u884c\u3059\u308b\u51e6\u7406\u3092\u5207\u308a\u66ff\u3048\u308b\u5236\u5fa1\u69cb\u9020\u306e\u7dcf\u79f0\u3002C\u8a00\u8a9e\u3067\u306fif\/else\u3001switch-case\u3001\u4e09\u9805\u6f14\u7b97\u5b50\uff08? :\uff09\u304c\u4ee3\u8868\u7684\u306a\u6761\u4ef6\u5206\u5c90\u306e\u624b\u6bb5\u3002switch-case\u306f\u6574\u6570\u5024\u306b\u3088\u308b\u591a\u5206\u5c90\u306b\u7279\u5316\u3057\u3001if-else\u3088\u308a\u9ad8\u901f\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308b\u3002<\/p><\/div>\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>if-else vs switch-case \u4f7f\u3044\u5206\u3051\u30ac\u30a4\u30c9\uff5c\u5224\u65ad\u57fa\u6e96\u3092\u6574\u7406\u3059\u308b<\/h2>\n\n<p>C\u8a00\u8a9e\u306b\u304a\u3051\u308b\u6761\u4ef6\u5206\u5c90\u306e\u4e8c\u5927\u624b\u6bb5\u3067\u3042\u308b<strong>if-else\u6587\u3068switch-case\u6587<\/strong>\u306f\u3001\u305d\u308c\u305e\u308c\u5f97\u610f\u306a\u5834\u9762\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u5927\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<p>\u307e\u305a\u3001\u305d\u308c\u305e\u308c\u306e\u7279\u6027\u3092\u6574\u7406\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<h3>switch-case\u304c\u9069\u3057\u3066\u3044\u308b\u5834\u9762<\/h3>\n\n<ul style=\"margin:16px 0;padding-left:24px\"><li style=\"margin-bottom:12px\"><strong>\u6574\u6570\u30fb\u6587\u5b57\u30fbenum\u306e\u5b9a\u6570\u5024\u306b\u3088\u308b\u5206\u5c90<\/strong>\uff1a\u4e00\u3064\u306e\u5909\u6570\u3092\u8907\u6570\u306e\u5b9a\u6570\u5024\u3068\u6bd4\u8f03\u3059\u308b\u5834\u5408<\/li><li style=\"margin-bottom:12px\"><strong>\u5206\u5c90\u306e\u6570\u304c\u591a\u3044\uff083\u3064\u4ee5\u4e0a\uff09<\/strong>\uff1a\u5206\u5c90\u304c\u5897\u3048\u308b\u307b\u3069switch-case\u306e\u53ef\u8aad\u6027\u304c\u969b\u7acb\u3064<\/li><li style=\"margin-bottom:12px\"><strong>\u30e1\u30cb\u30e5\u30fc\u51e6\u7406\u30fb\u30b3\u30de\u30f3\u30c9\u89e3\u6790<\/strong>\uff1a\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3084\u30b3\u30de\u30f3\u30c9\u30b3\u30fc\u30c9\u306b\u3088\u308b\u52d5\u4f5c\u5207\u308a\u66ff\u3048<\/li><li style=\"margin-bottom:12px\"><strong>\u72b6\u614b\u6a5f\u68b0\uff08\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\uff09<\/strong>\uff1aenum\u5024\u306b\u57fa\u3065\u304f\u72b6\u614b\u9077\u79fb\u51e6\u7406<\/li><li style=\"margin-bottom:12px\"><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u91cd\u8996<\/strong>\uff1a\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u30b8\u30e3\u30f3\u30d7\u30c6\u30fc\u30d6\u30eb\u306b\u6700\u9069\u5316\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308b<\/li><\/ul>\n\n<h3>if-else\u304c\u9069\u3057\u3066\u3044\u308b\u5834\u9762<\/h3>\n\n<ul style=\"margin:16px 0;padding-left:24px\"><li style=\"margin-bottom:12px\"><strong>\u7bc4\u56f2\u6bd4\u8f03\uff08>\u3001<\u3001>=\u3001<=\uff09<\/strong>\uff1aswitch-case\u3067\u306f\u7bc4\u56f2\u6761\u4ef6\u3092\u76f4\u63a5\u66f8\u3051\u306a\u3044<\/li><li style=\"margin-bottom:12px\"><strong>\u6d6e\u52d5\u5c0f\u6570\u70b9\uff08float\u30fbdouble\uff09\u306e\u6bd4\u8f03<\/strong>\uff1aswitch-case\u306f\u6574\u6570\u578b\u306e\u307f<\/li><li style=\"margin-bottom:12px\"><strong>\u6587\u5b57\u5217\uff08char\u914d\u5217\uff09\u306e\u6bd4\u8f03<\/strong>\uff1aswitch-case\u306f\u6587\u5b57\u5217\u3092\u76f4\u63a5\u6271\u3048\u306a\u3044<\/li><li style=\"margin-bottom:12px\"><strong>\u8907\u5408\u6761\u4ef6\uff08&&\u3001||\uff09<\/strong>\uff1a\u8907\u6570\u5909\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u6761\u4ef6\u306fif-else\u304c\u9069\u5207<\/li><li style=\"margin-bottom:12px\"><strong>\u5206\u5c90\u304c2\u301c3\u3064\u3067\u6761\u4ef6\u304c\u5358\u7d14<\/strong>\uff1a\u3053\u306e\u898f\u6a21\u306a\u3089if-else\u3067\u5341\u5206\u8aad\u307f\u3084\u3059\u3044<\/li><\/ul>\n\n<div class=\"g-flow-row\" style=\"display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:20px 0;padding:16px;background:#ecf0f1;border-radius:6px\"><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">\u6761\u4ef6\u304c\u6574\u6570\/enum\/\u6587\u5b57\u306e\u5b9a\u6570\u6bd4\u8f03?<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">\u5206\u5c90\u304c3\u3064\u4ee5\u4e0a?<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">switch-case\u3092\u9078\u629e<\/div><div style=\"color:#3498db;font-size:1.4em;padding:0 4px\">\u2192<\/div><div style=\"background:#3498db;color:#fff;padding:10px 16px;border-radius:4px;font-weight:bold;white-space:nowrap\">\u53ef\u8aad\u6027\u30fb\u4fdd\u5b88\u6027UP<\/div><\/div>\n\n<p>\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u3067\u5224\u65ad\u57fa\u6e96\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<pre style=\"background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:6px;overflow-x:auto;line-height:1.6;margin:20px 0\"><code>#include &lt;stdio.h&gt;\n\nint main(void) {\n    int score = 75;\n\n    \/* ---- if-else\u304c\u9069\u5207\u306a\u4f8b: \u7bc4\u56f2\u6bd4\u8f03 ---- *\/\n    if (score &gt;= 90) {\n        printf(\"\u8a55\u4fa1A: \u512a\u79c0\\n\");\n    } else if (score &gt;= 70) {\n        printf(\"\u8a55\u4fa1B: \u826f\u597d\\n\");\n    } else if (score &gt;= 50) {\n        printf(\"\u8a55\u4fa1C: \u53ef\\n\");\n    } else {\n        printf(\"\u8a55\u4fa1D: \u4e0d\u53ef\\n\");\n    }\n    \/* score\u306e\u7bc4\u56f2\u6bd4\u8f03 \u2192 if-else\u304c\u81ea\u7136 *\/\n\n    \/* ---- switch-case\u304c\u9069\u5207\u306a\u4f8b: \u5b9a\u6570\u5024\u3068\u306e\u6bd4\u8f03 ---- *\/\n    int command = 2;  \/* \u30e6\u30fc\u30b6\u30fc\u304c\u5165\u529b\u3057\u305f\u30b3\u30de\u30f3\u30c9\u756a\u53f7 *\/\n    switch (command) {\n        case 1: printf(\"\u30b3\u30de\u30f3\u30c91: \u30ea\u30b9\u30c8\u8868\u793a\\n\"); break;\n        case 2: printf(\"\u30b3\u30de\u30f3\u30c92: \u691c\u7d22\\n\");       break;\n        case 3: printf(\"\u30b3\u30de\u30f3\u30c93: \u8ffd\u52a0\\n\");       break;\n        case 4: printf(\"\u30b3\u30de\u30f3\u30c94: \u524a\u9664\\n\");       break;\n        case 0: printf(\"\u30b3\u30de\u30f3\u30c90: \u7d42\u4e86\\n\");       break;\n        default: printf(\"\u4e0d\u660e\u306a\u30b3\u30de\u30f3\u30c9\\n\");       break;\n    }\n    \/* \u5b9a\u6570\u30b3\u30fc\u30c9\u5024\u3068\u306e\u6bd4\u8f03 \u2192 switch-case\u304c\u81ea\u7136 *\/\n\n    return 0;\n}<\/code><\/pre>\n\n<p>\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u3068\u3044\u3046\u89b3\u70b9\u3067\u306f\u3001switch-case\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u304c<strong>\u30b8\u30e3\u30f3\u30d7\u30c6\u30fc\u30d6\u30eb<\/strong>\u3084<strong>\u30d0\u30a4\u30ca\u30ea\u30b5\u30fc\u30c1<\/strong>\u306b\u5909\u63db\u3067\u304d\u308b\u305f\u3081\u3001if-else\u3088\u308a\u3082\u9ad8\u901f\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306bcase\u5024\u304c\u9023\u7d9a\u3057\u305f\u6574\u6570\uff080, 1, 2, 3...\uff09\u306e\u5834\u5408\u3001\u30b8\u30e3\u30f3\u30d7\u30c6\u30fc\u30d6\u30eb\u3078\u306e\u6700\u9069\u5316\u304c\u884c\u308f\u308c\u3084\u3059\u304f\u3001O(1)\u3067\u76ee\u7684\u306ecase\u306b\u5230\u9054\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<p>\u305f\u3060\u3057\u3001\u73fe\u4ee3\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u306fif-else\u3082\u8ce2\u304f\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u3001<strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5dee\u3092\u6c17\u306b\u3059\u308b\u3088\u308a\u53ef\u8aad\u6027\u3092\u512a\u5148\u3059\u308b<\/strong>\u306e\u304c\u73fe\u5b9f\u7684\u306a\u5224\u65ad\u3067\u3059\u3002\u3069\u3061\u3089\u3092\u4f7f\u3046\u304b\u306f\u300c\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u81ea\u7136\u306b\u4f1d\u308f\u308b\u304b\u300d\u3092\u57fa\u6e96\u306b\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\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\u6574\u6570\u306e\u5b9a\u6570\u6bd4\u8f03\u30673\u5206\u5c90\u4ee5\u4e0a\u306a\u3089switch-case\u300d\u3068\u3044\u3046\u5224\u65ad\u57fa\u6e96\u3092\u982d\u306b\u5165\u308c\u3066\u304a\u304f\u3068\u3001\u73fe\u5834\u3067\u307b\u307c\u8ff7\u308f\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u7bc4\u56f2\u6bd4\u8f03\u30fb\u6587\u5b57\u5217\u6bd4\u8f03\u30fb\u8907\u5408\u6761\u4ef6\u306fif-else\u3068\u899a\u3048\u3066\u304a\u3051\u3070OK\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"border:2px solid #27ae60;border-radius:6px;padding:16px 20px;margin:24px 0;background:#f0fff4\"><p style=\"font-weight:bold;color:#27ae60;margin:0 0 8px\">\ud83d\udca1 switch-case\u3068if-else\u306e\u6df7\u5728<\/p><p style=\"margin:0\">\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u5916\u5074\u3092switch-case\u3067\u5927\u5206\u985e\u3057\u3066\u3001\u5404case\u306e\u4e2d\u3067if-else\u3092\u4f7f\u3063\u3066\u7d30\u304b\u3044\u6761\u4ef6\u3092\u51e6\u7406\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u304c\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002\u4e21\u8005\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u53ef\u8aad\u6027\u3068\u8868\u73fe\u529b\u3092\u4e21\u7acb\u3067\u304d\u307e\u3059\u3002<\/p><\/div>\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<h2>\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/h2>\n\n<dl style=\"margin:0\">\n<dt style=\"font-weight:bold;margin-top:20px;padding:12px 16px;background:#f0f4ff;border-left:4px solid #3498db;border-radius:4px 4px 0 0\">C\u8a00\u8a9e\u306eswitch-case\u6587\u3067float\u578b\u306f\u4f7f\u3048\u307e\u3059\u304b\uff1f<\/dt>\n<dd style=\"margin:0;padding:16px;background:#fff;border:1px solid #e0e8ff;border-top:none;border-radius:0 0 4px 4px\"><p style=\"margin:0\">switch-case\u6587\u3067\u306f\u3001switch\u306e\u6761\u4ef6\u5f0f\u306b\u4f7f\u3048\u308b\u578b\u306f\u6574\u6570\u578b\uff08int, char, short, long\u7b49\uff09\u3068enum\u578b\u306e\u307f\u3067\u3059\u3002float\u578b\u3084double\u578b\u306e\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306f\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3002\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u6761\u4ef6\u5206\u5c90\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001if-else\u6587\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001\u6587\u5b57\u5217\uff08char\u914d\u5217\uff09\u3082\u76f4\u63a5switch\u306e\u6761\u4ef6\u5f0f\u306b\u306f\u4f7f\u3048\u306a\u3044\u305f\u3081\u3001strcmp()\u3092\u4f7f\u3063\u305fif-else\u6587\u3067\u6bd4\u8f03\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p><\/dd>\n<dt style=\"font-weight:bold;margin-top:20px;padding:12px 16px;background:#f0f4ff;border-left:4px solid #3498db;border-radius:4px 4px 0 0\">switch-case\u6587\u3067break\u3092\u66f8\u304d\u5fd8\u308c\u308b\u3068\u3069\u3046\u306a\u308a\u307e\u3059\u304b\uff1f<\/dt>\n<dd style=\"margin:0;padding:16px;background:#fff;border:1px solid #e0e8ff;border-top:none;border-radius:0 0 4px 4px\"><p style=\"margin:0\">break\u3092\u66f8\u304d\u5fd8\u308c\u308b\u3068\u300cfall-through\uff08\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\uff09\u300d\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u4e00\u81f4\u3057\u305fcase\u306e\u51e6\u7406\u304c\u7d42\u308f\u3063\u305f\u5f8c\u3082\u3001\u6b21\u306ecase\u306e\u51e6\u7406\u304c\u7d9a\u3051\u3066\u5b9f\u884c\u3055\u308c\u308b\u52d5\u4f5c\u3067\u3059\u3002\u610f\u56f3\u3057\u306a\u3044fall-through\u306f\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u3084\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002\u5404case\u306e\u672b\u5c3e\u306b\u306f\u5fc5\u305abreak\u3092\u66f8\u304f\u7fd2\u6163\u3092\u3064\u3051\u3066\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057\u3001\u8907\u6570\u306ecase\u306b\u540c\u4e00\u306e\u51e6\u7406\u3092\u3055\u305b\u305f\u3044\u5834\u5408\u306f\u3001\u610f\u56f3\u7684\u306bbreak\u306a\u3057\u306efall-through\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p><\/dd>\n<dt style=\"font-weight:bold;margin-top:20px;padding:12px 16px;background:#f0f4ff;border-left:4px solid #3498db;border-radius:4px 4px 0 0\">switch-case\u6587\u306edefault\u306f\u7701\u7565\u3067\u304d\u307e\u3059\u304b\uff1f<\/dt>\n<dd style=\"margin:0;padding:16px;background:#fff;border:1px solid #e0e8ff;border-top:none;border-radius:0 0 4px 4px\"><p style=\"margin:0\">C\u8a00\u8a9e\u306e\u6587\u6cd5\u4e0a\u3001default\u53e5\u306f\u7701\u7565\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5b9f\u52d9\u3067\u306f\u5fc5\u305a\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u5f37\u304f\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002default\u3092\u7701\u7565\u3059\u308b\u3068\u3001\u60f3\u5b9a\u5916\u306e\u5024\u304c\u5165\u529b\u3055\u308c\u305f\u3068\u304d\u306b\u4f55\u3082\u51e6\u7406\u3055\u308c\u305a\u306b\u7121\u97f3\u3067\u30b9\u30ad\u30c3\u30d7\u3055\u308c\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u306a\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002MISRA-C\u306a\u3069\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3067\u306fdefault\u306e\u8a18\u8ff0\u3092\u5fc5\u9808\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306b\u3001\u5e38\u306bdefault\u3092\u66f8\u304f\u7fd2\u6163\u3092\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/p><\/dd>\n<dt style=\"font-weight:bold;margin-top:20px;padding:12px 16px;background:#f0f4ff;border-left:4px solid #3498db;border-radius:4px 4px 0 0\">\u30eb\u30fc\u30d7\u306e\u4e2d\u3067switch-case\u3092\u4f7f\u3046\u3068\u304d\u306e\u6ce8\u610f\u70b9\u306f\u4f55\u3067\u3059\u304b\uff1f<\/dt>\n<dd style=\"margin:0;padding:16px;background:#fff;border:1px solid #e0e8ff;border-top:none;border-radius:0 0 4px 4px\"><p style=\"margin:0\">\u30eb\u30fc\u30d7\uff08for\/while\/do-while\uff09\u306e\u4e2d\u3067switch-case\u6587\u3092\u4f7f\u3046\u5834\u5408\u3001switch\u5185\u306ebreak\u306fswitch\u3092\u629c\u3051\u308b\u3060\u3051\u3067\u5916\u5074\u306e\u30eb\u30fc\u30d7\u306f\u7d99\u7d9a\u3055\u308c\u307e\u3059\u3002\u30eb\u30fc\u30d7\u81ea\u4f53\u3092\u7d42\u4e86\u3055\u305b\u305f\u3044\u5834\u5408\u306f\u3001\u30d5\u30e9\u30b0\u5909\u6570\u3092\u4f7f\u3063\u3066\u30eb\u30fc\u30d7\u306e\u6761\u4ef6\u3067break\u3059\u308b\u304b\u3001goto\u6587\u3092\u4f7f\u3046\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305fcontinue\u6587\u306fswitch\u6587\u306b\u5f71\u97ff\u305b\u305a\u3001\u5916\u5074\u306e\u30eb\u30fc\u30d7\u306e\u6b21\u306e\u53cd\u5fa9\u306b\u9032\u307f\u307e\u3059\u3002\u3053\u306e\u70b9\u306fbreak\u306e\u52d5\u4f5c\u3068\u7570\u306a\u308b\u305f\u3081\u6df7\u4e71\u3057\u3084\u3059\u304f\u3001\u30b3\u30e1\u30f3\u30c8\u3067\u610f\u56f3\u3092\u660e\u793a\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p><\/dd>\n<dt style=\"font-weight:bold;margin-top:20px;padding:12px 16px;background:#f0f4ff;border-left:4px solid #3498db;border-radius:4px 4px 0 0\">enum\u3068switch-case\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u4f55\u3067\u3059\u304b\uff1f<\/dt>\n<dd style=\"margin:0;padding:16px;background:#fff;border:1px solid #e0e8ff;border-top:none;border-radius:0 0 4px 4px\"><p style=\"margin:0\">enum\u3068switch-case\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u5b89\u5168\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8\u306f3\u3064\u3067\u3059\u3002\u7b2c\u4e00\u306b\u3001\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\uff08\u610f\u5473\u4e0d\u660e\u306a\u6570\u5024\uff09\u3092\u6392\u9664\u3057\u3066\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002\u7b2c\u4e8c\u306b\u3001GCC\u306a\u3069\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u300cenum\u306e\u3059\u3079\u3066\u306e\u5024\u304ccase\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u300d\u3092\u8b66\u544a\u3067\u304d\u308b\u305f\u3081\u3001\u8ffd\u52a0\u3057\u5fd8\u308c\u3092\u9632\u3052\u307e\u3059\u3002\u7b2c\u4e09\u306b\u3001\u72b6\u614b\u6a5f\u68b0\uff08\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\uff09\u306a\u3069\u306e\u8907\u96d1\u306a\u72b6\u614b\u9077\u79fb\u30ed\u30b8\u30c3\u30af\u3092\u76f4\u611f\u7684\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p><\/dd>\n<\/dl>\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-switch-case&#038;blog_slug=cc-c-switch-case\" 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-switch-case&#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<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"C\u8a00\u8a9e\u306eswitch-case\u6587\u3067float\u578b\u306f\u4f7f\u3048\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        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