{"id":232,"date":"2014-12-14T16:42:21","date_gmt":"2014-12-14T08:42:21","guid":{"rendered":"http:\/\/yangwang.hk\/?p=232"},"modified":"2015-05-30T22:29:20","modified_gmt":"2015-05-30T14:29:20","slug":"2-1%e3%80%81%e5%8f%98%e9%87%8f%e3%80%81%e5%b8%b8%e9%87%8f","status":"publish","type":"post","link":"https:\/\/yangwang.hk\/?p=232","title":{"rendered":"2.1\u3001\u53d8\u91cf\u3001\u5e38\u91cf"},"content":{"rendered":"<p>\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u5206\u4e3a<strong>\u5e38\u91cf<\/strong>\u548c<strong>\u53d8\u91cf<\/strong>\u4e24\u79cd<\/p>\n<h3>\u5e38\u91cf<\/h3>\n<p>\u987e\u540d\u601d\u4e49\uff0c\u5e38\u91cf\u5c31\u662f\u503c\u4e0d\u80fd\u6539\u53d8\u7684\u91cf\u3002\u6bd4\u5982\u6211\u4eec\u5728\u7f16\u7a0b\u4e2d\u76f4\u63a5\u4f7f\u7528\u7684\u6570\u5b57\uff0c\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u5c31\u50cfhello world\u7a0b\u5e8f\u4e2d\u5199\u7684\uff0cprintf(&#8220;hello world&#8221;);\u4e2d\u7684&#8221;hello world&#8221;\u4fbf\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u5e38\u91cf\u3002<\/p>\n<p>\u5e38\u91cf\u53ef\u4ee5\u5206\u4e3a\u4e24\u79cd\uff0c\u4e00\u4e2a\u662f<strong>\u7b26\u53f7\u5e38\u91cf<\/strong>\uff0c\u4e00\u4e2a\u662f<strong>\u76f4\u63a5\u5e38\u91cf<\/strong><\/p>\n<p>\u76f4\u63a5\u5e38\u91cf\u5c31\u662f\u50cf\u4e0a\u9762\u90a3\u6837\u7684\u5b57\u7b26\u4e32\uff0c\u8fd8\u6709\u76f4\u63a5\u7ed9\u51fa\u7684\u6570\u5b57\uff0c\u6bd4\u59823.14159\u3002<\/p>\n<p>\u81f3\u4e8e\u7b26\u53f7\u5e38\u91cf\uff0c\u5219\u662f\u6211\u4eec\u4f7f\u7528\u6807\u5fd7\u7b26\u53bb\u4ee3\u8868\u4e00\u4e2a\u76f4\u63a5\u5e38\u91cf\u3002<\/p>\n<p>\u6211\u4eec\u7528define\u6765\u5b9a\u4e49\u7b26\u53f7\u5e38\u91cf\u3002<\/p>\n<p>\u73b0\u5728\u8bf7\u770b\u4e0b\u9762\u4e00\u4e2a\u7a0b\u5e8f<\/p>\n<pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\r\n#include &lt;stdio.h&gt;\r\n#include &lt;stdlib.h&gt;\r\n\r\n#define PI 3.14\r\nint main()\r\n{\r\n    int r = 10;\r\n    double s;\r\n    s = PI * r * r;\r\n    printf(&quot;\u534a\u5f84r=%d\\n\u5706\u5468\u7387PI=%f\\n\u9762\u79efS=%f&quot;,r,PI,s);\r\n    return 0;\r\n}\r\n<\/pre>\n<p>\u8bf7\u590d\u5236\u5230\u7f16\u8f91\u5668\u4e2d\uff0c\u4fdd\u5b58\u7f16\u8bd1\u5e76\u6267\u884c\u3002\u89c2\u5bdf\u7ed3\u679c\u540e\u518d\u7ee7\u7eed\u5f80\u4e0b\u770b\u3002<\/p>\n<p>\u8fd9\u4e2a\u7a0b\u5e8f\u53ef\u4ee5\u7528\u6765\u8ba1\u7b97\u5706\u7684\u9762\u79ef\uff0c\u5728\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u76f4\u63a5\u5e38\u91cf\u548c\u7b26\u53f7\u5e38\u91cf\u3002\u90a3\u4e2aPI\u4fbf\u662f\u7b26\u53f7\u5e38\u91cf\u3002\u800c\u540e\u9762\u7684\u534a\u5f8410\u5219\u662f\u76f4\u63a5\u5e38\u91cf\u3002<\/p>\n<p>\u5f88\u663e\u7136\uff0c\u4f7f\u7528\u7b26\u53f7\u5e38\u91cf\u6709\u52a9\u4e8e\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u6bd5\u7adf\u5982\u679c\u4f60\u6254\u4e00\u5927\u4e32\u6570\u5b57\u5728\u4e0a\u9762\uff0c\u9b3c\u77e5\u9053\u4f60\u90a3\u4e9b\u6570\u5b57\u54ea\u513f\u6765\u7684\uff0c\u53c8\u4ee3\u8868\u7740\u4ec0\u4e48\u3002\u800c\u901a\u8fc7\u201cPI\u201d\u5374\u53ef\u4ee5\u731c\u51fa\uff0c\u8fd9\u53ef\u80fd\u662f\u5706\u5468\u7387\uff08\u5982\u679c\u5728\u540e\u9762\u4f7f\u7528\u6ce8\u91ca\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u80af\u5b9a\u8fd9\u662f\u5706\u5468\u7387\u4e86\uff09\u3002<\/p>\n<p>\u4f7f\u7528\u7b26\u53f7\u5e38\u91cf\u8fd8\u6709\u4e2a\u597d\u5904\uff0c\u5c31\u662f\u65b9\u4fbf\u503c\u7684\u4fee\u6539\u3002\u4f8b\u5982\u4e0a\u9762\u7684\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u4e24\u6b21\u4f7f\u7528\u5230\u4e86PI\u7684\u6570\u503c<\/p>\n<p>\u5728\u7a0b\u5e8f\u7f16\u597d\u540e\uff0c\u6211\u4eec\u53c8\u60f3\u4fee\u6539PI\u7684\u503c\uff08\u4f8b\u5982\u53d1\u73b0PI\u7684\u7cbe\u5ea6\u4e0d\u591f\uff0c\u5e0c\u671b\u6539\u62103.14159265\uff09\uff0c\u90a3\u4e48\u6211\u4eec\u53ea\u9700\u8981\u5728\u5b9a\u4e49\u7684\u5730\u65b9\u8fdb\u884c\u4fee\u6539\uff0c\u8fd9\u6837\u7a0b\u5e8f\u4e2d\u6240\u6709\u4f7f\u7528\u5230PI\u7684\u5730\u65b9\uff0c\u503c\u90fd\u81ea\u52a8\u53d8\u5316\u4e86\u3002\u5982\u679c\u6211\u4eec\u4f7f\u7528\u7684\u662f\u76f4\u63a5\u5e38\u91cf\uff0c\u90a3\u4e48\u4f60\u5c31\u9700\u8981\u4e00\u4e00\u8fdb\u884c\u4fee\u6539\uff0c\u7a0b\u5e8f\u77ed\u8fd8\u597d\u8bf4\uff0c\u5982\u679c\u6211\u4eec\u54ea\u5929\u5199\u4e86\u4e00\u4e2a10w\u884c\u7684\u7a0b\u5e8f\uff0c\u518d\u5bf9\u5b83\u8fdb\u884c\u8fd9\u79cd\u4fee\u6539\u7684\u8bdd\uff0c\u90a3\u7b80\u76f4\u662f\u4e00\u573a\u5669\u68a6\uff01<\/p>\n<p>\u4f7f\u7528define\u5b9a\u4e49\u7b26\u53f7\u5e38\u91cf\u7684\u683c\u5f0f\u4e3a<\/p>\n<p>#define <em>\u7b26\u53f7\u5e38\u91cf\u7684\u540d\u5b57 \u00a0\u00a0<\/em> <strong>\u6240\u4ee3\u8868\u7684\u76f4\u63a5\u5e38\u91cf<\/strong><\/p>\n<p>define\u5b9a\u4e49\u7684\u7b26\u53f7\u5e38\u91cf\u4f1a\u5728\u7f16\u8bd1\u7684\u65f6\u5019\u88ab\u66ff\u6362\uff08\u4e25\u683c\u7684\u8bf4\u662f\u5728\u9884\u5904\u7406\u9636\u6bb5\uff09\uff0c\u6211\u4eec\u4ece\u4e0a\u9762\u4e00\u7ae0\u7684\u5c94\u8def\u53e3\u4e2d\u7684\u5b9e\u9a8c\u53ef\u4ee5\u5f88\u6e05\u6670\u7684\u770b\u51fa\u6765\u3002\u6240\u4ee5\u5b9e\u9645\u4e0a\u6700\u540e\u4ea4\u7ed9\u7f16\u8bd1\u5668\u53bb\u5904\u7406\u7684\uff0c\u8fd8\u662f\u76f4\u63a5\u5e38\u91cf\u3002<\/p>\n<p>\u300e<\/p>\n<p>\u8bf7\u53c2\u7167\u4e0a\u9762\u7684\u4f8b\u5b50\u7a0b\u5e8f\uff0c\u8bd5\u7740\u5b8c\u6210\u4e0b\u9762\u7684\u7a0b\u5e8f<\/p>\n<p>\u8ba1\u7b97\u81ea\u7531\u843d\u4f53\u8fd0\u52a8t\u65f6\u95f4\u65f6\u7684\u901f\u5ea6\uff0c\u5df2\u77e5\u91cd\u529b\u52a0\u901f\u5ea6g=10m\/s\uff08\u8bf7\u4f7f\u7528\u7b26\u53f7\u5e38\u91cf\uff09<\/p>\n<p>t=5s\uff0ct\u65f6\u523b\u7684\u901f\u5ea6\u4e3av=g*t<\/p>\n<p>\u300f<\/p>\n<h3>\u53d8\u91cf<\/h3>\n<p>\u53d8\u91cf\u5f53\u7136\u5c31\u662f\u53ef\u4ee5\u6539\u53d8\u7684\u91cf\u54af\u3002<\/p>\n<p>\u53d8\u91cf\u7684\u5b9e\u8d28\u662f\u5185\u5b58\u4e0a\u7684\u4e00\u5c0f\u5757\u50a8\u5b58\u533a\u57df\uff0c\u8fd9\u4e2a\u533a\u57df\u7684\u5927\u5c0f\u6839\u636e\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\u6709\u533a\u522b\u3002\u800c\u6211\u4eec\u4fee\u6539\u53d8\u91cf\u7684\u503c\u4e5f\u6b63\u662f\u4fee\u6539\u8fd9\u4e2a\u5185\u5b58\u533a\u57df\u4e2d\u7684\u6570\u636e\u3002<\/p>\n<p>\u53d8\u91cf\u662f\u4e00\u4e2a\u7a0b\u5e8f\u5f88\u91cd\u8981\u7684\u7ec4\u6210\u90e8\u5206\uff0c\u56e0\u6b64\u672c\u7ae0\u5f88\u5927\u4e00\u90e8\u5206\u90fd\u5c06\u4ecb\u7ecd\u53d8\u91cf\u7684\u5185\u5bb9<\/p>\n<p>\u5173\u4e8e\u66f4\u591a\u53d8\u91cf\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u5c06\u5728\u4e0b\u9762\u5b66\u4e60<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u5206\u4e3a\u5e38\u91cf\u548c\u53d8\u91cf\u4e24\u79cd \u5e38\u91cf \u987e\u540d\u601d\u4e49\uff0c\u5e38\u91cf\u5c31\u662f\u503c\u4e0d\u80fd\u6539\u53d8\u7684\u91cf\u3002\u6bd4\u5982\u6211\u4eec\u5728\u7f16\u7a0b\u4e2d\u76f4\u63a5\u4f7f\u7528\u7684\u6570\u5b57\uff0c\u5b57\u7b26\u4e32\u2026 <span class=\"read-more\"><a href=\"https:\/\/yangwang.hk\/?p=232\">Read More: 2.1\u3001\u53d8\u91cf\u3001\u5e38\u91cf &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-232","post","type-post","status-publish","format-standard","hentry","category-c"],"views":3127,"_links":{"self":[{"href":"https:\/\/yangwang.hk\/index.php?rest_route=\/wp\/v2\/posts\/232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yangwang.hk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yangwang.hk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yangwang.hk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yangwang.hk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=232"}],"version-history":[{"count":4,"href":"https:\/\/yangwang.hk\/index.php?rest_route=\/wp\/v2\/posts\/232\/revisions"}],"predecessor-version":[{"id":441,"href":"https:\/\/yangwang.hk\/index.php?rest_route=\/wp\/v2\/posts\/232\/revisions\/441"}],"wp:attachment":[{"href":"https:\/\/yangwang.hk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yangwang.hk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yangwang.hk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}