{"id":298,"date":"2025-07-17T14:41:32","date_gmt":"2025-07-17T14:41:32","guid":{"rendered":"http:\/\/west.wangyuansheng.cn\/?p=298"},"modified":"2025-07-18T06:01:31","modified_gmt":"2025-07-18T06:01:31","slug":"%e5%b7%b2%e7%9f%a5%e4%b8%80%e4%b8%aa%e5%9c%86%e7%9a%84%e5%8d%8a%e5%be%84%ef%bc%8c%e6%b1%82%e8%a7%a3%e8%af%a5%e5%9c%86%e7%9a%84%e9%9d%a2%e7%a7%af%e5%92%8c%e5%91%a8%e9%95%bf","status":"publish","type":"post","link":"http:\/\/west.wangyuansheng.cn\/?p=298","title":{"rendered":"\u5df2\u77e5\u4e00\u4e2a\u5706\u7684\u534a\u5f84\uff0c\u6c42\u89e3\u8be5\u5706\u7684\u9762\u79ef\u548c\u5468\u957f"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"961\" height=\"780\" src=\"http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1005.png\" alt=\"\" class=\"wp-image-299\" srcset=\"http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1005.png 961w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1005-300x243.png 300w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1005-768x623.png 768w\" sizes=\"auto, (max-width: 961px) 100vw, 961px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u5206\u6790\u95ee\u9898<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u60f3\u8c61\u4e00\u4e0b\uff0c\u5706\u5c31\u50cf\u4e00\u4e2a\u7f8e\u5473\u7684\u62ab\u8428\ud83c\udf55\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u534a\u5f84<\/strong>\uff08\u7528\u5b57\u6bcd ( r ) \u8868\u793a\uff09\uff1a\u5c31\u662f\u4ece\u62ab\u8428\u4e2d\u5fc3\u5230\u62ab\u8428\u8fb9\u7684\u8ddd\u79bb\uff08\u6bd4\u5982\u4ece\u5706\u5fc3\u5230\u997c\u8fb9\uff09\u3002<\/li>\n\n\n\n<li><strong>\u9762\u79ef<\/strong>\uff1a\u5c31\u662f\u6574\u5f20\u62ab\u8428\u7684\u5927\u5c0f\uff0c\u80fd\u653e\u591a\u5c11\u9985\u6599\u3002<\/li>\n\n\n\n<li><strong>\u5468\u957f<\/strong>\uff1a\u5c31\u662f\u62ab\u8428\u5916\u5708\u7684\u957f\u5ea6\uff0c\u5c31\u50cf\u7ed9\u62ab\u8428\u9576\u829d\u58eb\u8fb9\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u79d1\u5b66\u5bb6\u544a\u8bc9\u6211\u4eec\u8ba1\u7b97\u5706\u7684\u4e24\u4e2a\u9b54\u6cd5\u516c\u5f0f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9762\u79ef<\/strong> = \u03c0 \u00d7 \u534a\u5f84 \u00d7 \u534a\u5f84<br>\uff08\u5c31\u50cf\u628a\u62ab\u8428\u5207\u6210\u5c0f\u5757\u518d\u62fc\u6210\u957f\u65b9\u5f62\uff09<\/li>\n\n\n\n<li><strong>\u5468\u957f<\/strong> = 2 \u00d7 \u03c0 \u00d7 \u534a\u5f84<br>\uff08\u5c31\u50cf\u7528\u7ef3\u5b50\u7ed5\u62ab\u8428\u4e00\u5708\u518d\u62c9\u76f4\uff09<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u9898\u76ee\u7ed9\u4e86\u6211\u4eec\u4e00\u4e2a\u795e\u5947\u6570\u5b57 <strong>\u03c0\uff08p\u00e0i\uff09= 3.1415926<\/strong>\uff0c\u5c31\u50cf\u505a\u62ab\u8428\u7684\u79d8\u5bc6\u914d\u65b9\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f8b\u5b50<\/strong>\uff1a\u5982\u679c\u534a\u5f84\u662f 1\uff08\u6bd4\u5982\u4e00\u4e2a\u5c0f\u62ab\u8428\uff09\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9762\u79ef = 3.1415926 \u00d7 1 \u00d7 1 = 3.14\uff08\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff09<\/li>\n\n\n\n<li>\u5468\u957f = 2 \u00d7 3.1415926 \u00d7 1 = 6.28\uff08\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff09<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u5efa\u7acb\u6a21\u578b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5\u628a\u95ee\u9898\u5206\u6210\u56db\u6b65\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8f93\u5165<\/strong>\uff1a\u62ff\u5230\u5706\u7684\u534a\u5f84\uff08\u6574\u6570\uff0c\u6bd4\u5982 1\uff09<\/li>\n\n\n\n<li><strong>\u8ba1\u7b97\u9762\u79ef<\/strong>\uff1a\u7528\u516c\u5f0f \u9762\u79ef=<em>\u03c0<\/em>\u00d7<em>r<\/em>\u00d7<em>r<\/em><\/li>\n\n\n\n<li><strong>\u8ba1\u7b97\u5468\u957f<\/strong>\uff1a\u7528\u516c\u5f0f \u5468\u957f=2\u00d7<em>\u03c0<\/em>\u00d7<em>r<\/em><\/li>\n\n\n\n<li><strong>\u8f93\u51fa<\/strong>\uff1a\u7b2c\u4e00\u884c\u663e\u793a\u9762\u79ef\uff0c\u7b2c\u4e8c\u884c\u663e\u793a\u5468\u957f\uff08\u90fd\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff09<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c31\u50cf\u505a\u62ab\u8428\u7684\u6b65\u9aa4\uff1a<br>\u51c6\u5907\u9762\u56e2\uff08\u8f93\u5165\uff09\u2192 \u6492\u9985\u6599\uff08\u7b97\u9762\u79ef\uff09\u2192 \u9576\u829d\u58eb\u8fb9\uff08\u7b97\u5468\u957f\uff09\u2192 \u7aef\u4e0a\u684c\uff08\u8f93\u51fa\uff09<\/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&gt;\nusing namespace std;\n\nint main() {\n    const double PI = 3.1415926; \/\/ \u5b9a\u4e49\u03c0\u7684\u503c\uff08\u56fa\u5b9a\u4e0d\u53d8\uff09\n    int r;          \/\/ \u6b65\u9aa41\uff1a\u51c6\u5907\u88c5\u534a\u5f84\u7684\u76d2\u5b50\n    cin &gt;&gt; r;       \/\/ \u8f93\u5165\u534a\u5f84\uff08\u6bd4\u59821\uff09\n\n    double area = PI * r * r;     \/\/ \u6b65\u9aa42\uff1a\u8ba1\u7b97\u62ab\u8428\u5927\u5c0f\uff08\u9762\u79ef\uff09\n    double c = 2 * PI * r; \/\/ \u6b65\u9aa43\uff1a\u8ba1\u7b97\u829d\u58eb\u8fb9\u957f\u5ea6\uff08\u5468\u957f\uff09\n\n    \/\/ \u6b65\u9aa44\uff1a\u8f93\u51fa\u7ed3\u679c\uff08\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff09\n    cout &lt;&lt; fixed &lt;&lt; setprecision(2) &lt;&lt; area &lt;&lt; endl;\n    cout &lt;&lt; c &lt;&lt; endl;\n\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>\u7a0b\u5e8f\u8bf4\u660e<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>const double PI = 3.1415926;<\/code>\uff1a\u628a\u03c0\u7684\u503c\u5b58\u8fdb&#8221;\u9b54\u6cd5\u7f50\u5b50&#8221;\uff08\u5e38\u91cf\uff09\uff0c\u4e0d\u4f1a\u6539\u53d8<\/li>\n\n\n\n<li><code>int r;<\/code>\uff1a\u51c6\u5907\u76d2\u5b50\u88c5\u534a\u5f84<\/li>\n\n\n\n<li><code>cin >> r;<\/code>\uff1a\u8bfb\u53d6\u534a\u5f84\u503c<\/li>\n\n\n\n<li><code>area = PI * r * r<\/code>\uff1a\u8ba1\u7b97\u9762\u79ef\uff08\u03c0\u00d7\u534a\u5f84\u00d7\u534a\u5f84\uff09<\/li>\n\n\n\n<li><code>perimeter = 2 * PI * r<\/code>\uff1a\u8ba1\u7b97\u5468\u957f\uff082\u00d7\u03c0\u00d7\u534a\u5f84\uff09<\/li>\n\n\n\n<li><code>setprecision(2)<\/code>\uff1a\u8ba9\u7ed3\u679c\u50cf\u94b1\u4e00\u6837\u7cbe\u786e\u5230\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd0\u884c\u793a\u4f8b<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8f93\u5165\uff1a<code>1<\/code><\/li>\n\n\n\n<li>\u8f93\u51fa\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  3.14\n  6.28<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5206\u6790\u95ee\u9898 \u60f3\u8c61\u4e00\u4e0b\uff0c\u5706\u5c31\u50cf\u4e00\u4e2a\u7f8e\u5473\u7684\u62ab\u8428\ud83c\udf55\uff1a \u79d1\u5b66\u5bb6\u544a\u8bc9\u6211\u4eec\u8ba1\u7b97\u5706\u7684\u4e24\u4e2a\u9b54\u6cd5\u516c\u5f0f\uff1a&#8230; <a class=\"read-more\" href=\"http:\/\/west.wangyuansheng.cn\/?p=298\">\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-298","post","type-post","status-publish","format-standard","hentry","category-problem"],"_links":{"self":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/298","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=298"}],"version-history":[{"count":2,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/298\/revisions"}],"predecessor-version":[{"id":342,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/298\/revisions\/342"}],"wp:attachment":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=298"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}