{"id":63131,"date":"2023-11-24T17:14:51","date_gmt":"2023-11-24T09:14:51","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=63131"},"modified":"2023-11-24T17:14:58","modified_gmt":"2023-11-24T09:14:58","slug":"c%e8%af%ad%e8%a8%80%e9%87%8caba%ef%bc%9ccabc%e8%bf%99%e4%b8%aa%e6%80%8e%e4%b9%88%e8%af%a5%e5%88%a4%e6%96%ad","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/63131.html","title":{"rendered":"C\u8bed\u8a00\u91cca&gt;b?a\uff1cc?a:b:c;\u8fd9\u4e2a\u600e\u4e48\u8be5\u5224\u65ad"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\">\n<p>\u5728C \u8bed\u8a00\u4e2d\uff0c\u7c7b\u4f3c\u4e8e`a &gt; b ? a &lt; c ? a : b : c` \u8fd9\u6837\u7684\u6761\u4ef6\u5224\u65ad\u8868\u8fbe\u5f0f\u662f\u901a\u8fc7\u6761\u4ef6\u8fd0\u7b97\u7b26\uff08\u4e5f\u79f0\u4e3a\u4e09\u5143\u8fd0\u7b97\u7b26\uff09\u6765\u5b9e\u73b0\u7684\u3002\u8fd9\u79cd\u7ed3\u6784\u5141\u8bb8\u5728\u4e00\u884c\u4ee3\u7801\u4e2d\u6839\u636e\u6761\u4ef6\u9009\u62e9\u4e0d\u540c\u7684\u503c\u3002\u8ba9\u6211\u4eec\u6df1\u5165\u63a2\u8ba8\u8fd9\u79cd\u8868\u8fbe\u5f0f\u7684\u6267\u884c\u903b\u8f91\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u6761\u4ef6\u8fd0\u7b97\u7b26\u7684\u57fa\u672c\u7ed3\u6784<\/h2>\n\n\n\n<p>\u6761\u4ef6\u8fd0\u7b97\u7b26`? :` \u7531\u4e09\u90e8\u5206\u7ec4\u6210\uff1a\u9996\u5148\u662f\u4e00\u4e2a\u6761\u4ef6\u8868\u8fbe\u5f0f`a &gt; b`\uff0c\u63a5\u7740\u662f\u95ee\u53f7`?`\uff0c\u7136\u540e\u662f\u4e24\u4e2a\u53ef\u80fd\u7684\u7ed3\u679c\u8868\u8fbe\u5f0f\uff0c\u4ee5\u5192\u53f7`:` \u5206\u9694\u3002\u5982\u679c\u6761\u4ef6\u4e3a\u771f\uff0c\u5219\u8fd4\u56de\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\uff0c\u5426\u5219\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u5d4c\u5957\u6761\u4ef6\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<p>\u5728\u7ed9\u5b9a\u7684\u8868\u8fbe\u5f0f\u4e2d\uff0c\u6211\u4eec\u770b\u5230\u6761\u4ef6\u8fd0\u7b97\u7b26\u5d4c\u5957\u4f7f\u7528\u4e86\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6839\u636e\u6761\u4ef6\u7684\u7ed3\u679c\u4f1a\u9009\u62e9\u4e0d\u540c\u7684\u8868\u8fbe\u5f0f\u3002\u4f8b\u5982\uff0c`a &gt; b ? a &lt; c ? a : b : c` \u8868\u793a\u5982\u679c`a &gt; b` \u4e3a\u771f\uff0c\u5219\u8fdb\u4e00\u6b65\u5224\u65ad`a &lt; c`\uff0c\u82e5\u4e3a\u771f\u5219\u8fd4\u56de`a`\uff0c\u5426\u5219\u8fd4\u56de`b`\uff1b\u82e5`a &gt; b` \u4e3a\u5047\uff0c\u5219\u8fd4\u56de`c`\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u89e3\u8bfb\u590d\u6742\u7684\u6761\u4ef6\u5224\u65ad<\/h2>\n\n\n\n<p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fd9\u79cd\u6761\u4ef6\u5224\u65ad\u7ed3\u6784\u901a\u5e38\u7528\u4e8e\u7b80\u5316\u5bf9\u4e00\u7cfb\u5217\u6761\u4ef6\u7684\u5224\u65ad\uff0c\u5e76\u6839\u636e\u6761\u4ef6\u9009\u62e9\u4e0d\u540c\u7684\u7ed3\u679c\u3002\u8fd9\u79cd\u7d27\u51d1\u7684\u5199\u6cd5\u80fd\u591f\u5728\u4e0d\u5360\u7528\u592a\u591a\u7a7a\u95f4\u7684\u60c5\u51b5\u4e0b\u5b9e\u73b0\u76f8\u5bf9\u590d\u6742\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u6ce8\u610f\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027<\/h2>\n\n\n\n<p>\u5c3d\u7ba1\u6761\u4ef6\u8fd0\u7b97\u7b26\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u4e3a\u7b80\u6d01\uff0c\u4f46\u8fc7\u5ea6\u590d\u6742\u7684\u5d4c\u5957\u53ef\u80fd\u4f1a\u964d\u4f4e\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002\u5728\u4f7f\u7528\u7c7b\u4f3c\u7ed3\u6784\u65f6\uff0c\u9700\u8981\u786e\u4fdd\u903b\u8f91\u6e05\u6670\uff0c\u5e76\u5c3d\u91cf\u907f\u514d\u8fc7\u591a\u7684\u5d4c\u5957\uff0c\u4ee5\u514d\u727a\u7272\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u5b9e\u9645\u6848\u4f8b\u548c\u5e94\u7528\u573a\u666f<\/h2>\n\n\n\n<p>\u8fd9\u79cd\u6761\u4ef6\u5224\u65ad\u7ed3\u6784\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u5728\u7f16\u5199\u7b80\u77ed\u7684\u6761\u4ef6\u903b\u8f91\u65f6\uff0c\u6216\u8005\u9700\u8981\u5728\u4e00\u884c\u4ee3\u7801\u4e2d\u8fdb\u884c\u591a\u91cd\u6761\u4ef6\u5224\u65ad\u7684\u60c5\u51b5\u4e0b\u3002\u4f46\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u4e3a\u4e86\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u66f4\u5e38\u89c1\u7684\u505a\u6cd5\u662f\u4f7f\u7528if-else \u7ed3\u6784\u6216\u8005switch-case \u7ed3\u6784\uff0c\u8fd9\u6837\u80fd\u591f\u66f4\u6e05\u6670\u5730\u8868\u8fbe\u903b\u8f91\u3002<\/p>\n\n\n\n<p>\u6761\u4ef6\u8fd0\u7b97\u7b26\u662fC \u8bed\u8a00\u4e2d\u7528\u4e8e\u5feb\u901f\u7b80\u6d01\u5730\u8fdb\u884c\u6761\u4ef6\u5224\u65ad\u7684\u4e00\u79cd\u5de5\u5177\uff0c\u4f46\u5176\u590d\u6742\u7684\u5d4c\u5957\u7ed3\u6784\u53ef\u80fd\u4f1a\u964d\u4f4e\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\uff0c\u6839\u636e\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u6761\u4ef6\u5224\u65ad\u7ed3\u6784\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u4ee5\u786e\u4fdd\u4ee3\u7801\u7684\u6e05\u6670\u6613\u61c2\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n\n\n\n<p><img fetchpriority=\"high\" decoding=\"async\" width=\"484\" height=\"300\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/11\/955323-C\u8bed\u8a00\u91ccagtbacabc\u8fd9\u4e2a\u600e\u4e48\u8be5\u5224\u65ad.png?x-oss-process=image\/auto-orient,1\/format,webp\" class=\"aligncenter\" alt=\"C\u8bed\u8a00\u91cca&gt;b?a\uff1cc?a:b:c;\u8fd9\u4e2a\u600e\u4e48\u8be5\u5224\u65ad\" \/><\/p>\n\n\n\n<p><strong>\u5e38\u89c1\u95ee\u7b54\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u6761\u4ef6\u8fd0\u7b97\u7b26\u4e0eif-else \u7ed3\u6784\u6709\u4f55\u533a\u522b\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u6761\u4ef6\u8fd0\u7b97\u7b26`? :` \u548c`if-else` \u7ed3\u6784\u90fd\u7528\u4e8e\u6761\u4ef6\u5224\u65ad\uff0c\u4f46\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u8bed\u6cd5\u548c\u9002\u7528\u573a\u666f\u3002`if-else` \u7ed3\u6784\u66f4\u9002\u5408\u5904\u7406\u591a\u4e2a\u6761\u4ef6\u5206\u652f\uff0c\u800c\u6761\u4ef6\u8fd0\u7b97\u7b26\u5219\u66f4\u9002\u7528\u4e8e\u7b80\u5355\u7684\u6761\u4ef6\u9009\u62e9\uff0c\u53ef\u4ee5\u5728\u4e00\u884c\u4e2d\u5b8c\u6210\u7b80\u6d01\u7684\u5224\u65ad\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u5d4c\u5957\u6761\u4ef6\u8fd0\u7b97\u7b26\u4f1a\u5f71\u54cd\u4ee3\u7801\u6027\u80fd\u5417\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5d4c\u5957\u6761\u4ef6\u8fd0\u7b97\u7b26\u5e76\u4e0d\u4f1a\u76f4\u63a5\u5f71\u54cd\u4ee3\u7801\u6027\u80fd\u3002\u7f16\u8bd1\u5668\u4f1a\u5bf9\u8fd9\u4e9b\u4ee3\u7801\u8fdb\u884c\u4f18\u5316\uff0c\u4f46\u662f\u8fc7\u591a\u7684\u5d4c\u5957\u53ef\u80fd\u964d\u4f4e\u4ee3\u7801\u53ef\u8bfb\u6027\uff0c\u800c\u4e0d\u5229\u4e8e\u4ee3\u7801\u7ef4\u62a4\u548c\u7406\u89e3\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u6700\u9002\u5408\u4f7f\u7528\u6761\u4ef6\u8fd0\u7b97\u7b26\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u6761\u4ef6\u8fd0\u7b97\u7b26\u9002\u7528\u4e8e\u5728\u4e00\u884c\u4e2d\u6839\u636e\u7b80\u5355\u7684\u6761\u4ef6\u9009\u62e9\u4e0d\u540c\u7684\u503c\u3002\u4f8b\u5982\uff0c\u6839\u636e\u6761\u4ef6\u8bbe\u7f6e\u53d8\u91cf\u503c\u6216\u7b80\u5355\u7684\u6761\u4ef6\u8d4b\u503c\u3002\u4f46\u662f\uff0c\u5728\u903b\u8f91\u590d\u6742\u6216\u5305\u542b\u591a\u4e2a\u6761\u4ef6\u5206\u652f\u7684\u60c5\u51b5\u4e0b\uff0c\u66f4\u5efa\u8bae\u4f7f\u7528`if-else` \u7ed3\u6784\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u6761\u4ef6\u8fd0\u7b97\u7b26\u80fd\u5426\u7528\u4e8e\u591a\u4e2a\u6761\u4ef6\u5224\u65ad\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u6761\u4ef6\u8fd0\u7b97\u7b26\u672c\u8eab\u53ea\u652f\u6301\u4e00\u4e2a\u6761\u4ef6\u5224\u65ad\uff0c\u5373`condition ? expr1 : expr2`\u3002\u5d4c\u5957\u591a\u4e2a\u6761\u4ef6\u8fd0\u7b97\u7b26\u53ef\u4ee5\u5b9e\u73b0\u591a\u91cd\u6761\u4ef6\u5224\u65ad\uff0c\u4f46\u4f1a\u5f71\u54cd\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\uff0c\u901a\u5e38\u4e0d\u63a8\u8350\u8fc7\u5ea6\u5d4c\u5957\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u6761\u4ef6\u8fd0\u7b97\u7b26\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u5982\u4f55\u786e\u5b9a\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u6761\u4ef6\u8fd0\u7b97\u7b26\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u7531\u8868\u8fbe\u5f0f`expr1` \u548c`expr2` \u7684\u7c7b\u578b\u51b3\u5b9a\u3002\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u8868\u8fbe\u5f0f\u7684\u7c7b\u578b\u63a8\u65ad\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u7c7b\u578b\u3002\u5982\u679c`expr1` \u548c`expr2` \u7c7b\u578b\u4e0d\u540c\uff0c\u7f16\u8bd1\u5668\u4f1a\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u4ee5\u8fd4\u56de\u517c\u5bb9\u7684\u7c7b\u578b\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"\u5728C \u8bed\u8a00\u4e2d\uff0c\u7c7b\u4f3c\u4e8e`a &gt; b ? a &lt; c ? a : b : c` \u8fd9\u6837\u7684\u6761\u4ef6\u5224\u65ad\u8868\u8fbe\u5f0f\u662f [&hellip;]","protected":false},"author":3,"featured_media":63134,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[3479,277],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/63131"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=63131"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/63131\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/63134"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=63131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=63131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=63131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}