{"id":254,"date":"2019-07-21T01:38:11","date_gmt":"2019-07-20T17:38:11","guid":{"rendered":"http:\/\/www.mustenaka.cn\/?p=254"},"modified":"2019-07-21T12:01:41","modified_gmt":"2019-07-21T04:01:41","slug":"funsomethingofcandcpp","status":"publish","type":"post","link":"https:\/\/www.mustenaka.cn\/index.php\/2019\/07\/21\/funsomethingofcandcpp\/","title":{"rendered":"C++\u4e0eC\u8fdb\u884c\u8f93\u51fa\u6d41\u7ed1\u5b9a\u540e\u7684\u8da3\u4e8b"},"content":{"rendered":"

[\u7814\u7a76C++\u4e0eC\u8bed\u8a00\u7b80\u5355\u7684\u8f93\u51fa\u8bed\u53e5\u7684\u6548\u7387]<\/h2>\n

\u67d0\u56de\u5de5\u4f5c\u5185\u5bb9\u9700\u8981\u5bf9C++\u8f93\u5165\u8f93\u51fa\u6d41\u7684\u901f\u5ea6\u8fdb\u884c\u4e00\u6b21\u6d4b\u7b97\uff0c\u671f\u95f4\u53d1\u73b0\u4e86\u4e00\u4e2a\u6709\u8da3\u7684\u73b0\u8c61\uff0c\u6545\u5728\u6b64\u8fdb\u884c\u5206\u4eab\u3002<\/p>\n

<\/p>\n

\u51c6\u5907\u4e86\u56db\u5206\u4ee3\u7801\uff0c\u4ed6\u4eec\u90fd\u662f\u7b80\u5355\u76841+1\u8fdb\u884c\u76f4\u63a5\u7684\u8f93\u51fa\uff1a<\/p>\n

\u5206\u522b\u4e3a C++\u4f7f\u7528\u89e3\u9664\u8f93\u5165\u8f93\u51fa\u6d41\u7ed1\u5b9a\uff0c C++\u4e0d\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9a\uff0cC++\u76f4\u63a5\u4f7f\u7528C\u8bed\u8a00\u7684printf\uff0cC\u8bed\u8a00\u4f7f\u7528printf\u3002\u5b8c\u6210\u6d4b\u8bd5\u3002<\/p>\n

\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

\u3010 C++\u4f7f\u7528\u89e3\u9664\u8f93\u5165\u8f93\u51fa\u6d41\u7ed1\u5b9a\u3011<\/p>\n

#include<iostream>\r\n#include<cstdio>\r\n#include<ctime>\r\nusing namespace std;\r\nint main(){\r\n    ios::sync_with_stdio(false);\r\n    cin.tie(0);\r\n    cout.tie(0);\r\n\r\n    clock_t start,stop;\r\n    start=clock();\r\n\r\n    for(int i=0;i<=1e7;i++){\r\n        cout<<i<<endl;\r\n    }\r\n\r\n    stop=clock();\r\n    printf(\"\u603b\u8ba1\u7528\u65f6\u4e3a\uff1a%f\\n\",(double)(stop-start)\/CLOCKS_PER_SEC);\r\n    return 0;\r\n}\r\n\/\/C++ \u89e3\u9664\u7ed1\u5b9a\r\n<\/code><\/pre>\n
\u3010 C++\u4e0d\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9a\u3011<\/p>\n
#include<iostream>\r\n#include<cstdio>\r\n#include<ctime>\r\nusing namespace std;\r\nint main(){\u8017\u65f6\r\n    \/\/ ios::sync_with_stdio(false);\r\n    \/\/ cin.tie(0);\r\n    \/\/ cout.tie(0);\r\n\r\n    clock_t start,stop;\r\n    start=clock();\r\n\r\n    for(int i=0;i<=1e7;i++){\r\n        cout<<i<<endl;\r\n    }\r\n\r\n    stop=clock();\r\n    printf(\"\u603b\u8ba1\u7528\u65f6\u4e3a\uff1a%f\\n\",(double)(stop-start)\/CLOCKS_PER_SEC);\r\n    return 0;\r\n}\r\n\/\/C++ \u4e0d\u63a5\u89e6\u7ed1\u5b9a<\/code><\/pre>\n
\u3010C++\u76f4\u63a5\u4f7f\u7528C\u8bed\u8a00\u7684printf\u3011<\/p>\n
#include<iostream>\r\n#include<cstdio>\r\n#include<ctime>\r\nusing namespace std;\r\nint main(){\r\n    \/\/ ios::sync_with_stdio(false);\r\n    \/\/ cin.tie(0);\r\n    \/\/ cout.tie(0);\r\n\r\n    clock_t start,stop;\r\n    start=clock();\r\n\r\n    for(int i=0;i<=1e7;i++){\r\n        printf(\"%d\\n\",i);\r\n    }\r\n\r\n    stop=clock();\r\n    printf(\"\u603b\u8ba1\u7528\u65f6\u4e3a\uff1a%f\\n\",(double)(stop-start)\/CLOCKS_PER_SEC);\r\n    return 0;\r\n}\r\n\/\/C++ \u4f7f\u7528printf<\/code><\/pre>\n
\u3010C\u8bed\u8a00\u4f7f\u7528printf\u3011<\/p>\n
#include<stdio.h>\r\n#include<time.h>\r\nint main(){\r\n    \r\n    clock_t start,stop;\r\n    start=clock();\r\n\r\n    int i;\r\n    for(i=0;i<=1e7;i++){\r\n        printf(\"%d\\n\",i);\r\n    }\r\n\r\n    stop=clock();\r\n    \/\/printf(\"\u603b\u8ba1\u7528\u65f6\u4e3a\uff1a%f\\n\",(double)(stop-start)\/CLK_TCK);      \/\/Windows \u4e0b\u4f7f\u7528\r\n    printf(\"\u603b\u8ba1\u7528\u65f6\u4e3a\uff1a%f\\n\",(double)(stop-start)\/CLOCKS_PER_SEC); \/\/Linux \u4e0b\u4f7f\u7528\r\n    return 0;\r\n}\r\n\/\/C\u8bed\u8a00\u4f7f\u7528printf<\/code><\/pre>\n
\u4f7f\u7528clock()\u51fd\u6570\u8fdb\u884c\u8ba1\u65f6\uff0c\u5728\u8f93\u51fa\u6d4b\u8bd5\u4ee3\u7801\u8fd0\u884c\u524d\u8fdb\u884c\u6807\u8bb0\u8ba1\u65f6\uff0c\u7ed3\u675f\u540e\u540c\u6837\u8fdb\u884c\u6807\u8bb0\u8ba1\u65f6\uff0c\u5c06\u4e24\u6b21\u4e0d\u540c\u7684\u8ba1\u65f6\u529f\u80fd\u76f8\u51cf\u540e\u9664\u4ee5CLK_TCK<\/code>\u5c31\u53ef\u4ee5\u5f97\u5230\u4ee5\u79d2\u4e3a\u5355\u4f4d\u7684\u8017\u65f6\uff0c\u5728LINUX\u7cfb\u7edf\u4e0b\u9700\u8981\u628aCLK_TCK<\/code>\u66f4\u6362\u4e3aCLOCKS_PER_SEC<\/code>\u624d\u53ef\u4ee5\u6b63\u5e38\u8fd0\u884c\uff0c\u5426\u5219\u63d0\u793a\u62a5\u9519CLK_TCK<\/code> \u672a\u5b9a\u4e49\u3002<\/p>\n
\u6309\u7167\u4e2a\u4eba\u6240\u5b66\uff0c\u4ee3\u7801\u7684\u8fd0\u884c\u901f\u5ea6\u5e94\u8be5\u662f\uff08\u4ee5\u8017\u65f6\u4e3a\u6807\u51c6\uff09 C++\u4e0d\u89e3\u9664\u7ed1\u5b9a\u8017\u65f6 > C++\u89e3\u9664\u7ed1\u5b9a\u8017\u65f6 > C++\u4f7f\u7528printf\u8017\u65f6 > C\u8bed\u8a00\u4f7f\u7528printf\u8017\u65f6 \uff0cC\u8bed\u8a00\u5e94\u8be5\u662f\u6700\u5feb\u7684\u3002<\/p>\n
\u56e0\u6b64\u5206\u522b\u5728WINDOWS\u7cfb\u7edf\u4e0b\u4ee5\u4e00\u4e07\u6570\u636e(1e5<\/strong><\/em>)\u4e3a\u4f8b\uff0c\u8fdb\u884c\u4e86\u4e00\u6b21\u7b80\u5355\u7684\u6d4b\u8bd5\uff0c\u4e3a\u4e86\u6392\u9664\u7279\u6b8a\u60c5\u51b5\u6bcf\u4e2a\u60c5\u51b5\u53c8\u6d4b\u8bd5\u4e86\u4e09\u6b21\uff0c\u5728WINDOWS\u4e0b\u5f97\u51fa\u7684\u7ed3\u8bba\u5374\u4e3a\uff1a<\/p>\n
C++\u4f7f\u7528printf\u8017\u65f6 > C++\u4e0d\u89e3\u9664\u7ed1\u5b9a\u8017\u65f6 > C++\u89e3\u9664\u7ed1\u5b9a\u8017\u65f6 >\u00a0 C\u8bed\u8a00printf\u8017\u65f6<\/p><\/blockquote>\n
\u5728\u5e73\u65f6\u7684ACM\/\u84dd\u6865\u676f\u7b49\u8fd9\u4e9b\u8bad\u7ec3\u4e2d\uff0c\u7ed9\u6211\u7684\u5e38\u89c4\u6620\u50cf\u5e94\u8be5\u662fC++\u5982\u679c\u4e0d\u4f1a\u89e3\u9664\u7ed1\u5b9a\uff0c\u4f7f\u7528printf\u662f\u901f\u5ea6\u76f8\u5bf9\u800c\u8a00\u8f83\u5feb\u7684\uff0c\u7136\u800c\u73b0\u5728\u7684\u60c5\u51b5\u5374\u662f\u5f88\u660e\u663e\u7684C++\u76f4\u63a5\u4f7f\u7528printf\u6700\u6162\u3002<\/p>\n
\u4e3a\u4e86\u6a21\u62df\u771f\u5b9e\u7684\u6d4b\u8bc4\u673a(\u59ec)\u60c5\u51b5\uff0c\u6211\u8f6c\u5230\u81ea\u5df1\u7684LINUX\u7cfb\u7edf\u4e0a\u8fdb\u884c\u8fd0\u884c\uff0c\u8fd9\u91cc\u5148\u5199\u660e\u7cfb\u7edf\u548c\u7f16\u8bd1\u5668\u73af\u5883\uff1a\u3010\u7cfb\u7edf\uff1aElementaryOS5.0 (ubuntu18.04\u6539\u7248\u7cfb\u7edf) \u7f16\u8bd1\u5668 gcc 5.5.0 , g++ 5.5.0 \u3011<\/p>\n
\u7ed3\u679c\u5f88\u610f\u5916\uff0c\u540c\u6837\u7684\u7535\u8111\uff0cWindows\u4e0b\u8fd0\u884c\u7684\u8f93\u51fa\u4f18\u5316\u5230Linux\u5b8c\u5168\u53d8\u6210\u4e86\u53e6\u5916\u4e00\u79cd\u60c5\u51b5\uff0c\u5728\u4e00\u4e07\u6570\u636e\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e9b\u5c06\u8fd1\u4e00\u5206\u949f\u8fd0\u884c\u51fa\u6765\u7ed3\u679c\u7684\u4ee3\u7801\uff0c\u7edf\u7edf\u8fd0\u884c\u4e0d\u5230\u534a\u79d2\u949f\u5c31\u8fd0\u884c\u7ed3\u675f\u4e86\uff0c\u56e0\u6b64\u6211\u5c06\u6570\u636e\u7ffb\u4e86\u4e00\u767e\u500d\u5230\u4e00\u767e\u4e07\u7684\u6570\u636e\u91cf(1e7)\u8fdb\u884c\u518d\u5ea6\u7684\u6d4b\u8bd5\u3002\u4ee5\u4e0b\u662f\u4e09\u6b21\u6d4b\u8bd5\u7684\u7ed3\u679c<\/p>\n
<\/div>
<\/th><\/th><\/th><\/th><\/th><\/tr><\/thead>
WINDWOS\u4e0b[\u4e00\u4e07\u6570\u636e] <\/td>\u7b2c\u4e00\u6b21\u6d4b\u8bd5 <\/td>\u7b2c\u4e8c\u6b21\u6d4b\u8bd5 <\/td>\u7b2c\u4e09\u6b21\u6d4b\u8bd5 <\/td>\u5355\u4f4d(\u79d2) <\/td><\/tr>
\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9a\u7684cout <\/td>30.719000 <\/td>29.518000 <\/td>29.446000 <\/td><\/td><\/tr>
\u4e0d\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9acout <\/td>51.749000 <\/td> 49.383000 <\/td>47.605000 <\/td><\/td><\/tr>
C++\u6587\u4ef6\u7684printf <\/td>84.962000 <\/td>76.131000 <\/td>77.639000 <\/td><\/td><\/tr>
C\u8bed\u8a00\u6587\u4ef6\u7684printf <\/td>29.776000 <\/td>29.327000 <\/td>29.862000 <\/td><\/td><\/tr>
<\/td><\/td><\/td><\/td><\/td><\/tr>
LINUX\u4e0b[\u4e00\u4e07\u6570\u636e] <\/td><\/td><\/td><\/td><\/td><\/tr>
\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9a\u7684cout <\/td>0.199213 <\/td>0.195920 <\/td>0.195387 <\/td><\/td><\/tr>
\u4e0d\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9acout <\/td>0.199305 <\/td>0.188013 <\/td>0.199603 <\/td><\/td><\/tr>
C++\u6587\u4ef6\u7684printf <\/td>0.195575 <\/td>0.197582 <\/td>0.197400 <\/td><\/td><\/tr>
C\u8bed\u8a00\u6587\u4ef6\u7684printf <\/td>0.195144 <\/td>0.200245 <\/td>0.215732 <\/td><\/td><\/tr>
<\/td><\/td><\/td><\/td><\/td><\/tr>
LINUX\u4e0b[\u4e00\u767e\u4e07\u6570\u636e] <\/td><\/td><\/td><\/td><\/td><\/tr>
\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9a\u7684cout <\/td>18.359119 <\/td> 18.066489 <\/td>18.309879 <\/td><\/td><\/tr>
\u4e0d\u4f7f\u7528\u89e3\u9664\u7ed1\u5b9acout <\/td>18.655116 <\/td>18.655820 <\/td>18.657697 <\/td><\/td><\/tr>
C++\u6587\u4ef6\u7684printf <\/td>18.354496 <\/td>18.592422 <\/td>18.312166 <\/td><\/td><\/tr>
C\u8bed\u8a00\u6587\u4ef6\u7684printf <\/td>18.463724 <\/td>18.475845 <\/td>18.495757 <\/td><\/td><\/tr>
<\/td><\/td><\/td><\/td><\/td><\/tr><\/tbody><\/table><\/div>Table Plugin<\/a>\n
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[\u7814\u7a76C++\u4e0eC\u8bed\u8a00\u7b80\u5355\u7684\u8f93\u51fa\u8bed\u53e5\u7684\u6548\u7387] \u67d0\u56de\u5de5\u4f5c\u5185\u5bb9\u9700\u8981\u5bf9C++\u8f93\u5165\u8f93\u51fa\u6d41\u7684\u901f\u5ea6\u8fdb\u884c\u4e00\u6b21\u6d4b\u7b97\uff0c\u671f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[33,7],"class_list":["post-254","post","type-post","status-publish","format-standard","hentry","category-cpp","tag-c","tag-linux"],"views":1879,"_links":{"self":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts\/254","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/comments?post=254"}],"version-history":[{"count":10,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts\/254\/revisions"}],"predecessor-version":[{"id":256,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/posts\/254\/revisions\/256"}],"wp:attachment":[{"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/media?parent=254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/categories?post=254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mustenaka.cn\/index.php\/wp-json\/wp\/v2\/tags?post=254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}