{"id":321,"date":"2025-07-17T15:39:33","date_gmt":"2025-07-17T15:39:33","guid":{"rendered":"http:\/\/west.wangyuansheng.cn\/?p=321"},"modified":"2025-07-18T06:00:19","modified_gmt":"2025-07-18T06:00:19","slug":"%e6%ad%a3%e5%a4%9a%e8%be%b9%e5%bd%a2%e6%af%8f%e4%b8%aa%e5%86%85%e8%a7%92%e7%9a%84%e5%ba%a6%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/west.wangyuansheng.cn\/?p=321","title":{"rendered":"\u6b63\u591a\u8fb9\u5f62\u6bcf\u4e2a\u5185\u89d2\u7684\u5ea6\u6570\uff1f"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"938\" height=\"1024\" src=\"http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1317-938x1024.jpg\" alt=\"\" class=\"wp-image-322\" srcset=\"http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1317-938x1024.jpg 938w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1317-275x300.jpg 275w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1317-768x839.jpg 768w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1317.jpg 957w\" sizes=\"auto, (max-width: 938px) 100vw, 938px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u5206\u6790\u95ee\u9898\uff08\u7ed9\u4e94\u5e74\u7ea7\u540c\u5b66\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u5bb6\u597d\uff01\u6211\u4eec\u4eca\u5929\u8981\u89e3\u51b3\u4e00\u4e2a\u5173\u4e8e\u6b63\u591a\u8fb9\u5f62\u5185\u89d2\u5ea6\u6570\u7684\u95ee\u9898\u3002\u6b63\u591a\u8fb9\u5f62\u5c31\u662f\u6240\u6709\u8fb9\u90fd\u76f8\u7b49\u3001\u6240\u6709\u89d2\u90fd\u76f8\u7b49\u7684\u56fe\u5f62\uff0c\u6bd4\u5982\u7b49\u8fb9\u4e09\u89d2\u5f62\u3001\u6b63\u65b9\u5f62\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u6709\u4e24\u4e2a\u5173\u952e\u77e5\u8bc6\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5185\u89d2\u548c\u5b9a\u7406<\/strong>\uff1a\u4efb\u4f55\u591a\u8fb9\u5f62\u5185\u89d2\u548c = (\u8fb9\u6570 &#8211; 2) \u00d7 180\u00b0<\/li>\n\n\n\n<li><strong>\u6b63\u591a\u8fb9\u5f62\u7279\u6027<\/strong>\uff1a\u6240\u6709\u5185\u89d2\u90fd\u76f8\u7b49\uff0c\u6240\u4ee5\u6bcf\u4e2a\u5185\u89d2 = \u603b\u5185\u89d2\u548c \u00f7 \u8fb9\u6570<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e09\u89d2\u5f62\uff083\u6761\u8fb9\uff09\uff1a\u603b\u5185\u89d2\u548c = (3-2)*180 = 180\u00b0\uff0c\u6bcf\u4e2a\u89d2 = 180\u00f73 = 60\u00b0<\/li>\n\n\n\n<li>\u6b63\u65b9\u5f62\uff084\u6761\u8fb9\uff09\uff1a\u603b\u5185\u89d2\u548c = (4-2)*180 = 360\u00b0\uff0c\u6bcf\u4e2a\u89d2 = 360\u00f74 = 90\u00b0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5efa\u7acb\u6a21\u578b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ba1\u7b97\u6b65\u9aa4\u5f88\u7b80\u5355\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u603b\u5185\u89d2\u548c = (n &#8211; 2) * 180<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u5185\u89d2 = \u603b\u5185\u89d2\u548c \/ n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5408\u5e76\u6210\u4e00\u4e2a\u516c\u5f0f\uff1a<br><strong>\u6bcf\u4e2a\u5185\u89d2\u5ea6\u6570 = ((n &#8211; 2) * 180) \/ n<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\u628a\u7ed3\u679c\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e1\u4f4d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7f16\u5199\u7a0b\u5e8f\uff08C++\uff09<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;bits\/stdc++.h>\nusing namespace std;\n\nint main() {\n    int n; \/\/ \u5b9a\u4e49\u53d8\u91cf\u5b58\u50a8\u8fb9\u6570\n    cin >> n; \/\/ \u8f93\u5165\u8fb9\u6570\n\n    \/\/ \u8ba1\u7b97\u5185\u89d2\u5ea6\u6570\n    double angle = ((n - 2) * 180.0) \/ n;\n\n    \/\/ \u8f93\u51fa\u7ed3\u679c\uff0c\u4fdd\u75591\u4f4d\u5c0f\u6570\n    cout &lt;&lt; fixed &lt;&lt; setprecision(1) &lt;&lt; angle &lt;&lt; endl;\n    return 0;\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u4fdd\u5b58 \u7f16\u8bd1 \u8fd0\u884c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801\u8bf4\u660e<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8f93\u5165\u5904\u7406<\/strong>\uff1a<code>cin &gt;&gt; n<\/code> \u8bfb\u53d6\u7528\u6237\u8f93\u5165\u7684\u6b63\u591a\u8fb9\u5f62\u8fb9\u6570<\/li>\n\n\n\n<li><strong>\u8ba1\u7b97\u516c\u5f0f<\/strong>\uff1a<code>((n - 2) * 180.0) \/ n<\/code><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528180.0\u786e\u4fdd\u8ba1\u7b97\u7ed3\u679c\u662f\u5c0f\u6570<\/li>\n\n\n\n<li>\u4f8b\u5982 n=5 \u65f6\uff1a((5-2)<em>180)\/5 = (3<\/em>180)\/5 = 540\/5 = 108.0<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8f93\u51fa\u63a7\u5236<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>fixed<\/code> \u548c <code>setprecision(1)<\/code> \u4fdd\u8bc1\u8f93\u51fa\u4fdd\u75591\u4f4d\u5c0f\u6570<\/li>\n\n\n\n<li>\u4f8b\u5982 120.0 \u4f1a\u8f93\u51fa\u4e3a &#8220;120.0&#8221;\uff0c128.57\u2026 \u4f1a\u8f93\u51fa\u4e3a &#8220;128.6&#8221;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u8fd0\u884c\u793a\u4f8b<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8f93\u5165<\/th><th>\u8f93\u51fa<\/th><th>\u8ba1\u7b97\u8fc7\u7a0b<\/th><\/tr><\/thead><tbody><tr><td>3<\/td><td>60.0<\/td><td>(1*180)\/3 = 60<\/td><\/tr><tr><td>4<\/td><td>90.0<\/td><td>(2*180)\/4 = 90<\/td><\/tr><tr><td>5<\/td><td>108.0<\/td><td>(3*180)\/5 = 108<\/td><\/tr><tr><td>6<\/td><td>120.0<\/td><td>(4*180)\/6 = 120<\/td><\/tr><tr><td>8<\/td><td>135.0<\/td><td>(6*180)\/8 = 135<\/td><\/tr><tr><td>10<\/td><td>144.0<\/td><td>(8*180)\/10 = 144<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f60\u53d1\u73b0\u4e86\u4ec0\u4e48\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u8fb9\u6570\u589e\u52a0\u65f6\uff0c\u6bcf\u4e2a\u5185\u89d2\u7684\u5ea6\u6570\u4f1a\u53d8\u5927\uff0c\u591a\u8fb9\u5f62\u4f1a\u8d8a\u6765\u8d8a\u63a5\u8fd1\u5706\u5f62\u3002\u6700\u5927\u7684\u5185\u89d2\u662f\u5341\u8fb9\u5f62\u7684144\u00b0\uff0c\u4f46\u6c38\u8fdc\u4e0d\u4f1a\u8fbe\u5230180\u00b0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5206\u6790\u95ee\u9898\uff08\u7ed9\u4e94\u5e74\u7ea7\u540c\u5b66\uff09 \u5927\u5bb6\u597d\uff01\u6211\u4eec\u4eca\u5929\u8981\u89e3\u51b3\u4e00\u4e2a\u5173\u4e8e\u6b63\u591a\u8fb9\u5f62\u5185\u89d2\u5ea6\u6570\u7684\u95ee\u9898\u3002\u6b63\u591a\u8fb9\u5f62\u5c31\u662f\u6240\u6709\u8fb9\u90fd\u76f8\u7b49\u3001\u6240\u6709\u89d2\u90fd\u76f8\u7b49\u7684\u56fe\u5f62\uff0c\u6bd4\u5982\u7b49\u8fb9\u4e09\u89d2\u5f62\u3001\u6b63\u65b9\u5f62\u3002 \u8fd9\u91cc\u6709\u4e24\u4e2a\u5173\u952e\u77e5\u8bc6\u70b9\uff1a&#8230; <a class=\"read-more\" href=\"http:\/\/west.wangyuansheng.cn\/?p=321\">\u9605\u8bfb\u66f4\u591a&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-321","post","type-post","status-publish","format-standard","hentry","category-problem"],"_links":{"self":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=321"}],"version-history":[{"count":3,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions"}],"predecessor-version":[{"id":336,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions\/336"}],"wp:attachment":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=321"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}