{"id":318,"date":"2025-07-17T15:31:38","date_gmt":"2025-07-17T15:31:38","guid":{"rendered":"http:\/\/west.wangyuansheng.cn\/?p=318"},"modified":"2025-07-18T06:00:24","modified_gmt":"2025-07-18T06:00:24","slug":"%e6%b1%82%e5%9c%86%e7%8e%af%e7%9a%84%e9%9d%a2%e7%a7%af","status":"publish","type":"post","link":"http:\/\/west.wangyuansheng.cn\/?p=318","title":{"rendered":"\u6c42\u5706\u73af\u7684\u9762\u79ef"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"755\" height=\"1024\" src=\"http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1338-755x1024.jpg\" alt=\"\" class=\"wp-image-319\" srcset=\"http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1338-755x1024.jpg 755w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1338-221x300.jpg 221w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1338-768x1041.jpg 768w, http:\/\/west.wangyuansheng.cn\/wp-content\/uploads\/2025\/07\/1338.jpg 956w\" sizes=\"auto, (max-width: 755px) 100vw, 755px\" \/><\/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\u73af\u5c31\u50cf\u4e00\u4e2a\u94c1\u7247\u505a\u7684\u751c\u751c\u5708\uff1a\u5b83\u6709\u4e00\u4e2a\u5927\u5706\uff08\u5916\u5706\uff09\u548c\u4e00\u4e2a\u5c0f\u5706\uff08\u5185\u5706\uff0c\u7a7a\u5fc3\u90e8\u5206\uff09\u3002\u8981\u8ba1\u7b97\u94c1\u7247\u7684\u9762\u79ef\uff0c\u6211\u4eec\u53ea\u9700\u8981\u7528\u5927\u5706\u7684\u9762\u79ef\u51cf\u53bb\u5c0f\u5706\u7684\u9762\u79ef\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5927\u5706\u9762\u79ef<\/strong>\uff1a\u534a\u5f84\u662f ( r1 )\uff08\u6bd4\u5982 10 cm\uff09\uff0c\u9762\u79ef\u516c\u5f0f\u662f ( pi * r1 * r1 )\uff08\u03c0 \u8bfb\u4f5c\u201c\u6d3e\u201d\uff0c\u8fd9\u91cc\u53d6 3.14\uff09\u3002<\/li>\n\n\n\n<li><strong>\u5c0f\u5706\u9762\u79ef<\/strong>\uff1a\u534a\u5f84\u662f ( r2 )\uff08\u6bd4\u5982 6 cm\uff09\uff0c\u9762\u79ef\u516c\u5f0f\u662f ( pi * r2 * r2 )\u3002<\/li>\n\n\n\n<li><strong>\u94c1\u7247\u9762\u79ef<\/strong>\uff1a\u5927\u5706\u9762\u79ef\u51cf\u53bb\u5c0f\u5706\u9762\u79ef\uff0c\u5373 ( pi * r1 * r1 &#8211; pi * r2 * r2 )\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff0c\u5f53 ( r1 = 10 )\u3001( r2 = 6 )\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u5706\u9762\u79ef = ( 3.14 * 10 * 10 = 314.00 )<\/li>\n\n\n\n<li>\u5c0f\u5706\u9762\u79ef = ( 3.14 * 6 * 6 = 113.04 )<\/li>\n\n\n\n<li>\u94c1\u7247\u9762\u79ef = ( 314.00 &#8211; 113.04 = 200.96 )<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\uff0c\u7ed3\u679c\u8981\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff08\u6bd4\u5982 200.96\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5efa\u7acb\u6a21\u578b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8f93\u5165<\/strong>\uff1a\u4e24\u4e2a\u6574\u6570 ( r1 ) \u548c ( r2 )\uff08\u5206\u522b\u4ee3\u8868\u5916\u5706\u548c\u5185\u5706\u7684\u534a\u5f84\uff09\u3002<\/li>\n\n\n\n<li><strong>\u8ba1\u7b97<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ba1\u7b97\u5927\u5706\u534a\u5f84\u7684\u5e73\u65b9\uff1a( r1 * r1 )<\/li>\n\n\n\n<li>\u8ba1\u7b97\u5c0f\u5706\u534a\u5f84\u7684\u5e73\u65b9\uff1a( r2 * r2 )<\/li>\n\n\n\n<li>\u8ba1\u7b97\u9762\u79ef\u5dee\u503c\uff1aPI * r1 * r1 &#8211; PI * r2 * r2<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8f93\u51fa<\/strong>\uff1a\u9762\u79ef\uff0c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u7f16\u5199\u4ee3\u7801<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684 C++ \u7a0b\u5e8f\u3002\u7a0b\u5e8f\u4f1a\u8bfb\u53d6\u4e24\u4e2a\u6574\u6570\uff08\u5916\u5706\u548c\u5185\u5706\u534a\u5f84\uff09\uff0c\u8ba1\u7b97\u5706\u73af\u9762\u79ef\uff0c\u5e76\u8f93\u51fa\u7ed3\u679c\uff08\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff09\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;bits\/stdc++.h>\n\nusing namespace std;\nint main() {\n    \/\/ \u5b9a\u4e49 \u03c0 \u7684\u503c\u4e3a 3.14\n    const double PI = 3.14;\n    int r1, r2; \/\/ \u5b9a\u4e49\u4e24\u4e2a\u53d8\u91cf\uff0c\u5b58\u50a8\u5916\u5706\u548c\u5185\u5706\u7684\u534a\u5f84\n    cin >> r1 >> r2; \/\/ \u4ece\u8f93\u5165\u8bfb\u53d6\u4e24\u4e2a\u6574\u6570\uff08\u4f8b\u5982\uff1a\u8f93\u5165 \"10 6\"\uff09\n    \/\/ \u8ba1\u7b97\u94c1\u7247\u9762\u79ef\uff1a\u03c0 * (r1\u00b2 - r2\u00b2)\n    double area = PI * r1 * r1 - PI * r2 * r2;\n    \/\/ \u8f93\u51fa\u7ed3\u679c\uff0c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff08\u4f8b\u5982\uff1a\u8f93\u51fa 200.96\uff09\n    cout &lt;&lt; fixed &lt;&lt; setprecision(2) &lt;&lt; area &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<ul class=\"wp-block-list\">\n<li><strong>\u8f93\u5165\u793a\u4f8b<\/strong>\uff1a<code>10 6<\/code>\uff08\u8868\u793a\u5916\u5706\u534a\u5f84 10 cm\uff0c\u5185\u5706\u534a\u5f84 6 cm\uff09<\/li>\n\n\n\n<li><strong>\u8f93\u51fa\u793a\u4f8b<\/strong>\uff1a<code>200.96<\/code><\/li>\n\n\n\n<li><strong>\u6ce8\u610f<\/strong>\uff1a\u7a0b\u5e8f\u5047\u8bbe \u03c0 \u7684\u503c\u662f 3.14\uff0c\u7ed3\u679c\u603b\u662f\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff08\u5982 200.96 \u800c\u4e0d\u662f 200.960000\uff09\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5206\u6790\u95ee\u9898 \u60f3\u8c61\u4e00\u4e0b\uff0c\u5706\u73af\u5c31\u50cf\u4e00\u4e2a\u94c1\u7247\u505a\u7684\u751c\u751c\u5708\uff1a\u5b83\u6709\u4e00\u4e2a\u5927\u5706\uff08\u5916\u5706\uff09\u548c\u4e00\u4e2a\u5c0f\u5706\uff08\u5185\u5706\uff0c\u7a7a\u5fc3\u90e8\u5206\uff09\u3002\u8981\u8ba1\u7b97\u94c1\u7247\u7684\u9762\u79ef\uff0c\u6211\u4eec\u53ea\u9700\u8981\u7528\u5927\u5706\u7684\u9762\u79ef\u51cf\u53bb\u5c0f\u5706\u7684\u9762\u79ef\u3002 \u4f8b\u5982\uff0c\u5f53&#8230; <a class=\"read-more\" href=\"http:\/\/west.wangyuansheng.cn\/?p=318\">\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-318","post","type-post","status-publish","format-standard","hentry","category-problem"],"_links":{"self":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/318","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=318"}],"version-history":[{"count":2,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/318\/revisions"}],"predecessor-version":[{"id":337,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=\/wp\/v2\/posts\/318\/revisions\/337"}],"wp:attachment":[{"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=318"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/west.wangyuansheng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}