{"id":207940,"date":"2025-07-08T12:41:16","date_gmt":"2025-07-08T04:41:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207940\/"},"modified":"2025-07-08T12:41:16","modified_gmt":"2025-07-08T04:41:16","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-go-%e4%b8%ad%e4%bd%bf%e7%94%a8-switch-%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207940\/","title":{"rendered":"\u5982\u4f55\u5728 Go \u4e2d\u4f7f\u7528 switch \u8bed\u53e5"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u5728 Go \u4e2d\u4f7f\u7528 switch \u8bed\u53e5<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-27 08:18:39<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u79ef\u7d2f\u77e5\u8bc6\uff0c\u80dc\u8fc7\u79ef\u84c4\u91d1\u94f6\uff01\u6bd5\u7adf\u5728Golang\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u9047\u5230\u5404\u79cd\u5404\u6837\u7684\u95ee\u9898\uff0c\u5f80\u5f80\u90fd\u662f\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u6ca1\u6709\u638c\u63e1\u597d\u800c\u5bfc\u81f4\u7684\uff0c\u56e0\u6b64\u57fa\u7840\u77e5\u8bc6\u70b9\u7684\u79ef\u7d2f\u662f\u5f88\u91cd\u8981\u7684\u3002\u4e0b\u9762\u672c\u6587\u300a\u5982\u4f55\u5728 Go \u4e2d\u4f7f\u7528 switch \u8bed\u53e5\u300b\uff0c\u5c31\u5e26\u5927\u5bb6\u8bb2\u89e3\u4e00\u4e0b\u77e5\u8bc6\u70b9\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

package main\n\nimport \"fmt\"\n\nfunc main() {\n\n    var age int\n    fmt.Scanf(\"%d\", &age)\n\n    \/\/ Code your switch or if...else-if statement here.\n    \n    switch age {\n    case 1:\n        age <= 14\n        fmt.Println(\"Toy Story 4\")\n    case 2:\n        age <= 18\n        fmt.Println(\"The Matrix\")\n    case 3:\n        age <= 25\n        fmt.Println(\"John Wick\")\n    case 4:\n        age <= 35\n        fmt.Println(\"Constantine\")\n    case 5:\n        age > 35\n        fmt.Println(\"Speed\")\n    default:\n        fmt.Println(\"Error: Unknown age\")\n    }\n}<\/pre>\n
\u6211\u5728 ide \u4e2d\u770b\u5230 scanf<\/code> \u7684\u9ec4\u8272\u6807\u8bb0\uff0c\u6807\u8bb0\u4e3a\u672a\u5904\u7406\u7684\u9519\u8bef\u3002\u6b64\u5916\uff0c\u6240\u6709\u6848\u4f8b\u7684\u7b2c\u4e00\u884c\u90fd\u6807\u8bb0\u4e3a\u7ea2\u8272\uff0c\u4ece\u800c\u963b\u6b62\u7f16\u8bd1\u3002\u6211\u5f97\u5230\u7684\u9519\u8bef\u662f age <= 14 \u88ab\u8bc4\u4f30\uff0c\u4f46\u6ca1\u6709\u4f7f\u7528 <\/code>\u3002\u6240\u6709\u9648\u8ff0\u90fd\u662f\u5982\u6b64\u3002\u6211\u5728\u7f51\u4e0a\u641c\u7d22\u5e76\u67e5\u770b\u4e86\u793a\u4f8b\uff0c\u4ece\u6211\u6240\u770b\u5230\u7684\u6765\u770b\uff0c\u4ee3\u7801\u6b63\u5982\u6750\u6599\u548c\u793a\u4f8b\u6240\u8ff0\u3002\u4ee5\u4e0b\u662f go land (jetbrains) \u7684\u5c4f\u5e55\u622a\u56fe\uff1a<\/p>\n
\u6709\u4eba\u6709\u60f3\u6cd5\u5417\uff1f\u53e6\u5916\uff0c\u5982\u679c\u60a8\u56de\u7b54\uff0c\u8bf7\u8bb0\u4f4f\uff0c\u8fd9\u662f go \u8bfe\u7a0b\u7684\u8bfe\u7a0b\uff0c\u6211\u5fc5\u987b\u4f7f\u7528 scanf\u3002\u6211\u53ef\u4ee5\u5c06\u5f00\u5173\u66f4\u6539\u4e3a else if\uff0c\u8fd9\u53ef\u80fd\u4f1a\u89e3\u51b3\u95ee\u9898\uff0c\u4f46\u6211\u6709\u70b9\u597d\u5947\u4e3a\u4ec0\u4e48\u4f1a\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u4ee5\u53ca\u5982\u4f55\u89e3\u51b3\u5b83\u3002 \ud83d\ude42<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
age <= 14<\/code> \u4e0d\u662f\u4e00\u4e2a\u6709\u6548\u7684 go \u8868\u8fbe\u5f0f\uff0c\u5c3d\u7ba1\u5b83\u53ef\u4ee5\u7528\u4f5c go \u8868\u8fbe\u5f0f\u7684\u4e00\u90e8\u5206\u3002 go \u5bf9\u4e8e\u6240\u6709\u88ab\u6d88\u8017\u7684\u503c\u975e\u5e38\u6311\u5254\u3002<\/p>\n
\u8fd9\u4e0d\u662f\u4f7f\u7528 <=<\/code> \u8fd0\u7b97\u7b26\u7f16\u5199 case<\/code> \u7684\u6b63\u786e\u65b9\u6cd5\u3002<\/p>\n
switch age {\n    case 1:\n        age <= 14\n        fmt.println(\"toy story 4\")\n    ...\n    }<\/pre>\n
\u5982\u679c age<\/code> \u7684\u503c\u4e3a 1<\/code>\uff0c\u5219\u8be5\u60c5\u51b5\u5339\u914d\u3002\u60a8\u60f3\u4f7f\u7528\u8fd9\u6837\u7684\u5f00\u5173\u6837\u5f0f\uff1a<\/p>\n
switch {\ncase age <= 14:\n   fmt.println(\"toy story 4\")\ncase age <= 18:\n   ...\n...\n}<\/pre>\n
\u6dfb\u52a0\u5230 daniel \u6240\u5199\u7684\u5185\u5bb9\u4e2d \u2014 \u57fa\u672c\u4e0a switch \u8bed\u53e5\uff08\u9664\u975e\u5b83\u662f\u7c7b\u578b\u5f00\u5173\uff0c\u4f46\u6211\u4eec\u4e0d\u8981\u79bb\u9898\uff09\u6709\u4e24\u79cd\u5f62\u5f0f\uff1a<\/p>\n
switch { \/\/ note the absense of any expression here\n  case bool_expr_1:\n    ...\n  case bool_expr_2:\n    ...\n<\/pre>\n
\u548c<\/p>\n
switch any_expr {\n  case value_to_match_1:\n    ...\n  case value_to_match_2:\n    ...\n<\/pre>\n
\u5728\u7b2c\u4e00\u79cd\u5f62\u5f0f\u4e2d\uff0c\u6bcf\u4e2a case<\/code> \u5206\u652f\u4e2d\u7684\u8868\u8fbe\u5f0f\u4ece\u4e0a\u5230\u4e0b\u8fdb\u884c\u8ba1\u7b97\uff0c\u7b2c\u4e00\u4e2a\u8ba1\u7b97\u7ed3\u679c\u4e3a true<\/code> \u7684\u8868\u8fbe\u5f0f\u201c\u83b7\u80dc\u201d\uff0c\u5373\u6267\u884c\u8be5\u5206\u652f\u4e2d\u7684\u4ee3\u7801\u3002
 \u5728\u7b2c\u4e8c\u79cd\u5f62\u5f0f\u4e2d\uff0c\u5bf9\u8868\u8fbe\u5f0f\u8fdb\u884c\u6c42\u503c\u4ee5\u751f\u6210\u4e00\u4e2a\u503c\uff0c\u7136\u540e\u5c06\u8be5\u503c\u4e0e\u6bcf\u4e2a case \u5206\u652f\u4e2d\u7684\u503c\u8fdb\u884c\u7cbe\u786e\u6bd4\u8f83\u3002<\/p>\n
\u60a8\u5c1d\u8bd5\u8fc7\u5c06\u4e24\u79cd\u5f62\u5f0f\u7ed3\u5408\u8d77\u6765\uff0c\u4f46\u8fd9\u662f\u884c\u4e0d\u901a\u7684\u3002
 \u60a8\u53ef\u80fd\u8ba4\u4e3a case \u5206\u652f\u4e2d\u7684\u8fd9\u4e9b\u6570\u5b57\u662f\u5e94\u5982\u4f55\u68c0\u67e5\u5206\u652f\u7684\u987a\u5e8f\uff0c\u4f46\u4e8b\u5b9e\u5e76\u975e\u5982\u6b64\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5982\u4f55\u5728 Go \u4e2d\u4f7f\u7528 switch \u8bed\u53e5\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207940","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207940","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207940"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207940\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207940"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207940"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}