{"id":12515,"date":"2023-01-09T16:40:02","date_gmt":"2023-01-09T08:40:02","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=12515"},"modified":"2023-01-09T16:40:06","modified_gmt":"2023-01-09T08:40:06","slug":"c%e7%a8%8b%e5%ba%8f%e4%b8%ad%e5%be%aa%e7%8e%af%e8%af%ad%e5%8f%a5%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/12515.html","title":{"rendered":"C\u7a0b\u5e8f\u4e2d\u5faa\u73af\u8bed\u53e5\u6709\u54ea\u4e9b"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\">\n<p>C\u7a0b\u5e8f\u4e2d\u5faa\u73af\u8bed\u53e5\u6709\uff1a1. while \u5faa\u73af\uff1b2. for \u5faa\u73af\uff1b3. do&#8230;while \u5faa\u73af\u3002\u5176\u4e2d\uff0cwhile \u8868\u8fbe\u5f0f\u662f\u9876\u90e8\u9a71\u52a8\uff08\u8f83\u597d-driven\uff09\u7684\u5faa\u73af\uff1a\u5148\u8ba1\u7b97\u5faa\u73af\u6761\u4ef6\uff08\u4e5f\u5c31\u662f\u63a7\u5236\u8868\u8fbe\u5f0f\uff09\u3002\u5982\u679c\u4e3a true\uff0c\u5c31\u6267\u884c\u5faa\u73af\u4f53\uff0c\u7136\u540e\u518d\u6b21\u8ba1\u7b97\u63a7\u5236\u8868\u8fbe\u5f0f\u3002<\/p>\n<\/blockquote>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"680\" height=\"421\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/01\/\u9ed8\u8ba4\u6807\u9898__2023-01-09-10_08_49.png?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\" class=\"wp-image-12516\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/01\/\u9ed8\u8ba4\u6807\u9898__2023-01-09-10_08_49.png 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/01\/\u9ed8\u8ba4\u6807\u9898__2023-01-09-10_08_49-300x186.png 300w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e00\u3001C\u7a0b\u5e8f\u4e2d\u5faa\u73af\u8bed\u53e5<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. while <\/strong><strong>\u5faa\u73af<\/strong><\/h3>\n\n\n\n<p>while \u8868\u8fbe\u5f0f\u662f\u9876\u90e8\u9a71\u52a8\uff08\u8f83\u597d-driven\uff09\u7684\u5faa\u73af\uff1a\u5148\u8ba1\u7b97\u5faa\u73af\u6761\u4ef6\uff08\u4e5f\u5c31\u662f\u63a7\u5236\u8868\u8fbe\u5f0f\uff09\u3002\u5982\u679c\u4e3a true\uff0c\u5c31\u6267\u884c\u5faa\u73af\u4f53\uff0c\u7136\u540e\u518d\u6b21\u8ba1\u7b97\u63a7\u5236\u8868\u8fbe\u5f0f\u3002\u5982\u679c\u63a7\u5236\u8868\u8fbe\u5f0f\u4e3a false\uff0c\u7a0b\u5e8f\u8df3\u8fc7\u5faa\u73af\u4f53\uff0c\u800c\u53bb\u6267\u884c\u5faa\u73af\u4f53\u540e\u9762\u7684\u8bed\u53e5\u3002<\/p>\n\n\n\n<p>\u4ece\u8bed\u6cd5\u4e0a\u8bb2\uff0c\u5faa\u73af\u4f53\u53ea\u6709\u4e00\u6761\u8bed\u53e5\u7ec4\u6210\u3002\u5982\u679c\u9700\u8981\u6267\u884c\u591a\u6761\u8bed\u53e5\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u8bed\u53e5\u5757\u628a\u5b83\u4eec\u7ec4\u5408\u5728\u4e00\u8d77\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. for <\/strong><strong>\u5faa\u73af<\/strong><\/h3>\n\n\n\n<p>\u548c while \u4e00\u6837\uff0cfor \u5faa\u73af\u4e5f\u662f\u4e00\u4e2a\u9876\u90e8\u9a71\u52a8\u7684\u5faa\u73af\uff0c\u4f46\u662f\u5b83\u5305\u542b\u4e86\u66f4\u591a\u7684\u5faa\u73af\u903b\u8f91\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<p>for ([\u8868\u8fbe\u5f0f1];[\u8868\u8fbe\u5f0f2];[\u8868\u8fbe\u5f0f3])<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp; \u8bed\u53e5<\/p>\n\n\n\n<p>\u5728\u4e00\u4e2a\u5178\u578b\u7684 for \u5faa\u73af\u4e2d\uff0c\u5728\u5faa\u73af\u4f53\u9876\u90e8\uff0c\u4e0b\u8ff0\u4e09\u4e2a\u52a8\u4f5c\u9700\u8981\u6267\u884c\uff1a<\/p>\n\n\n\n<p><strong>(1) <\/strong><strong>\u8868\u8fbe\u5f0f 1\uff1a\u521d\u59cb\u5316<\/strong><\/p>\n\n\n\n<p>\u53ea\u8ba1\u7b97\u4e00\u6b21\u3002\u5728\u8ba1\u7b97\u63a7\u5236\u8868\u8fbe\u5f0f\u4e4b\u524d\uff0c\u5148\u8ba1\u7b97\u4e00\u6b21\u8868\u8fbe\u5f0f 1\uff0c\u4ee5\u8fdb\u884c\u5fc5\u8981\u7684\u521d\u59cb\u5316\uff0c\u540e\u9762\u4e0d\u518d\u8ba1\u7b97\u5b83\u3002<\/p>\n\n\n\n<p><strong>(2) <\/strong><strong>\u8868\u8fbe\u5f0f 2\uff1a\u63a7\u5236\u8868\u8fbe\u5f0f<\/strong><\/p>\n\n\n\n<p>\u6bcf\u8f6e\u5faa\u73af\u524d\u90fd\u8981\u8ba1\u7b97\u63a7\u5236\u8868\u8fbe\u5f0f\uff0c\u4ee5\u5224\u65ad\u662f\u5426\u9700\u8981\u7ee7\u7eed\u672c\u8f6e\u5faa\u73af\u3002\u5f53\u63a7\u5236\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u4e3a false\uff0c\u7ed3\u675f\u5faa\u73af\u3002<\/p>\n\n\n\n<p><strong>(3) <\/strong><strong>\u8868\u8fbe\u5f0f 3\uff1a\u8c03\u8282\u5668<\/strong><\/p>\n\n\n\n<p>\u8c03\u8282\u5668\uff08\u4f8b\u5982\u8ba1\u6570\u5668\u81ea\u589e\uff09\u5728\u6bcf\u8f6e\u5faa\u73af\u7ed3\u675f\u540e\u4e14\u8868\u8fbe\u5f0f 2 \u8ba1\u7b97\u524d\u6267\u884c\u3002\u5373\uff0c\u5728\u8fd0\u884c\u4e86\u8c03\u8282\u5668\u540e\uff0c\u6267\u884c\u8868\u8fbe\u5f0f 2\uff0c\u4ee5\u8fdb\u884c\u5224\u65ad\u3002<\/p>\n\n\n\n<p>\u4e00\u822c\u6765\u8bf4\uff0c\u5f53\u5faa\u73af\u5185\u6709\u8ba1\u6570\u5668\u6216\u7d22\u5f15\u53d8\u91cf\u9700\u8981\u88ab\u521d\u59cb\u5316\uff0c\u5e76\u4e14\u5728\u6bcf\u6b21\u5faa\u73af\u65f6\u9700\u8981\u8c03\u6574\u5b83\u4eec\u7684\u503c\u65f6\uff0c\u8f83\u597d\u4f7f\u7528 for \u5faa\u73af\uff0c\u800c\u4e0d\u662f while \u5faa\u73af\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. do&#8230;while <\/strong><strong>\u5faa\u73af<\/strong><\/h3>\n\n\n\n<p>do&#8230;while \u5faa\u73af\u662f\u4e00\u79cd\u5e95\u90e8\u9a71\u52a8\u7684\u5faa\u73af\uff1a<\/p>\n\n\n\n<p>do \u8bed\u53e5 while (\u8868\u8fbe\u5f0f);<\/p>\n\n\n\n<p>\u5728\u63a7\u5236\u8868\u8fbe\u5f0f\u88ab\u540d\u5217\u524d\u8305\u6b21\u8ba1\u7b97\u4e4b\u524d\uff0c\u5faa\u73af\u4f53\u8bed\u53e5\u4f1a\u9996\u5148\u88ab\u6267\u884c\u4e00\u6b21\u3002\u4e0e while \u548c for \u5faa\u73af\u4e0d\u540c\uff0cdo&#8230;while \u5faa\u73af\u4f1a\u786e\u4fdd\u5faa\u73af\u4f53\u8bed\u53e5\u81f3\u5c11\u6267\u884c\u4e00\u6b21\u3002\u5982\u679c\u63a7\u5236\u8868\u8fbe\u5f0f\u7684\u503c\u4e3a true\uff0c\u90a3\u4e48\u53e6\u4e00\u6b21\u5faa\u73af\u5c31\u4f1a\u7ee7\u7eed\uff1b\u5982\u679c\u662f false\uff0c\u5219\u5faa\u73af\u7ed3\u675f\u3002<\/p>\n\n\n\n<p><strong>\u5ef6\u4f38\u9605\u8bfb\uff1a<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e8c\u3001C\u8bed\u8a00\u5e0c\u5c14\u6392\u5e8f\u7b97\u6cd5<\/strong><\/h2>\n\n\n\n<p>\u5e0c\u5c14\u6392\u5e8f\u662f\u5728\u76f4\u63a5\u63d2\u5165\u6392\u5e8f\u7684\u57fa\u7840\u4e0a\u505a\u7684\u6539\u8fdb\uff0c\u4e5f\u5c31\u662f\u5c06\u5bd2\u6392\u5e8f\u7684\u5e8f\u5217\u6309\u56fa\u5b9a\u589e\u91cf\u5206\u6210\u82e5\u5e72\u7ec4\uff0c\u7b49\u8ddd\u8005\u5728\u540c\u4e8c\u7ec4\u4e2d\uff0c\u7136\u540e\u518d\u5728\u7ec4\u5185\u8fdb\u884c\u76f4\u63a5\u63d2\u5165\u6392\u5e8f\u3002\u8fd9\u91cc\u9762\u7684\u56fa\u5b9a\u589e\u91cf\u4ece n\/2 \u5f00\u59cb\uff0c\u4ee5\u540e\u6bcf\u6b21\u7f29\u5c0f\u5230\u539f\u6765\u7684\u4e00\u534a\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8eC\u7a0b\u5e8f\u4e2d\u5faa\u73af\u8bed\u53e5\u7684\u5185\u5bb9\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"C\u7a0b\u5e8f\u4e2d\u5faa\u73af\u8bed\u53e5\u6709\uff1a1. while \u5faa\u73af\uff1b2. for \u5faa\u73af\uff1b3. do&#8230;while \u5faa\u73af\u3002\u5176\u4e2d [&hellip;]","protected":false},"author":1,"featured_media":12516,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/12515"}],"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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=12515"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/12515\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/12516"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=12515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=12515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=12515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}