{"id":7852,"date":"2023-08-17T22:23:13","date_gmt":"2023-08-17T14:23:13","guid":{"rendered":"https:\/\/yanjingang.com\/blog\/?p=7852"},"modified":"2023-08-17T22:24:08","modified_gmt":"2023-08-17T14:24:08","slug":"c-enum%e6%9e%9a%e4%b8%be%e7%9a%84%e8%be%93%e5%87%ba%e9%87%8d%e8%bd%bd","status":"publish","type":"post","link":"https:\/\/yanjingang.com\/blog\/?p=7852","title":{"rendered":"C++ enum\u679a\u4e3e\u7684\u8f93\u51fa\u91cd\u8f7d"},"content":{"rendered":"<p>\u6211\u4eec\u5728\u7f16\u5199\u7a0b\u5e8f\u65f6\u7ecf\u5e38\u4f1a\u7528\u5230enum\u679a\u4e3e\u7c7b\u578b\uff0c\u4f7f\u7528\u975e\u5e38\u65b9\u4fbf\u3002\u4f46\u662f\u5f53\u679a\u4e3e\u5b9a\u4e49\u8f83\u591a\u65f6\uff0c\u5728LOG\u6253\u5370\u65f6\u8f93\u51fa\u503c\u5f88\u96be\u76f4\u89c2\u7684\u660e\u767d\u5176\u542b\u4e49\uff0c\u5fc5\u987b\u5bf9\u7167enum\u5b9a\u4e49\u3002\u672c\u6587\u4ecb\u7ecd\u4e00\u4e2a\u6bd4\u8f83\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u8ba9LOG\u6253\u5370\u6216std::cout\u8f93\u51fa\u679a\u4e3e\u503c\u65f6\uff0c\u76f4\u63a5\u8f93\u51fa\u6587\u672c\u3002<\/p>\n<pre class=\"pure-highlightjs\"><code class=\"\">#include &lt;iostream&gt;\r\n\r\n\/\/ \u679a\u4e3e\u5b9a\u4e49\r\nenum RequestType {TYPE_POST, TYPE_GET}; \r\n\r\n\/\/ \u91cd\u8f7denum RequestType\u7c7b\u578b\u7684&lt;&lt;\u8fd0\u7b97\u7b26 \r\ninline std::ostream&amp; operator&lt;&lt;(std::ostream&amp; os, const RequestType req_type) {\r\n    switch (req_type) {\r\n        case RequestType::TYPE_POST: {\r\n            os &lt;&lt; \"TYPE_POST\";\r\n            break;\r\n        }\r\n        case RequestType::TYPE_GET: {\r\n            os &lt;&lt; \"TYPE_GET\";\r\n            break;\r\n        }\r\n        default: {\r\n            os &lt;&lt; \"UNKNOWN\";\r\n            break;\r\n        }\r\n    }\r\n    return os;\r\n}\r\n\r\nint main()\r\n{\r\n    auto A = RequestType::TYPE_POST;\r\n    auto B = RequestType::TYPE_GET;\r\n\r\n    \/\/ \u6d4b\u8bd5cout\u8f93\u51fa\r\n    std::cout &lt;&lt; A &lt;&lt; \" - \" &lt;&lt; B &lt;&lt; std::endl;\r\n    return 0;\r\n}\r\n\r\n\/\/ \u8f93\u51fa\u6548\u679c\uff1aTYPE_POST - TYPE_GET<\/code><\/pre>\n<p>&nbsp;<\/p>\n<p>yan 23.8.17<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u4eec\u5728\u7f16\u5199\u7a0b\u5e8f\u65f6\u7ecf\u5e38\u4f1a\u7528\u5230enum\u679a\u4e3e\u7c7b\u578b\uff0c\u4f7f\u7528\u975e\u5e38\u65b9\u4fbf\u3002\u4f46\u662f\u5f53\u679a\u4e3e\u5b9a\u4e49\u8f83\u591a\u65f6\uff0c\u5728LOG\u6253\u5370\u65f6\u8f93\u51fa\u503c\u5f88\u96be\u76f4\u89c2\u7684 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1027],"tags":[877,1311],"_links":{"self":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7852"}],"collection":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7852"}],"version-history":[{"count":3,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7852\/revisions"}],"predecessor-version":[{"id":7855,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7852\/revisions\/7855"}],"wp:attachment":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}