{"id":312781,"date":"2021-01-14T17:04:49","date_gmt":"2021-01-14T09:04:49","guid":{"rendered":"http:\/\/4563.org\/?p=312781"},"modified":"2021-01-14T17:04:49","modified_gmt":"2021-01-14T09:04:49","slug":"%e8%af%b7%e9%97%ae%e6%9c%89%e4%ba%ba%e7%9f%a5%e9%81%93-c%e9%87%8c%e9%9d%a2-time0-%e8%8e%b7%e5%8f%96%e6%97%b6%e9%97%b4%e4%bc%9a%e6%9c%89%e5%bc%82%e5%b8%b8%e7%9a%84%e6%83%85%e5%86%b5%e5%90%97","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=312781","title":{"rendered":"\u8bf7\u95ee\u6709\u4eba\u77e5\u9053 c++\u91cc\u9762 time(0) \u83b7\u53d6\u65f6\u95f4\u4f1a\u6709\u5f02\u5e38\u7684\u60c5\u51b5\u5417\uff1f"},"content":{"rendered":"
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\u8bf7\u95ee\u6709\u4eba\u77e5\u9053 c++\u91cc\u9762 time(0) \u83b7\u53d6\u65f6\u95f4\u4f1a\u6709\u5f02\u5e38\u7684\u60c5\u51b5\u5417\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : zuoanyx <\/span> <\/i> 2<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u4e4b\u524d\u505a\u4e00\u4e2a\u5d4c\u5165\u5f0f\u8bbe\u5907\u7684\u5f00\u53d1\uff0c\u7528 C\/C++\uff0c\u9700\u8981\u83b7\u53d6\u7cfb\u7edf\u65f6\u95f4\uff0c\u53ea\u9700\u8981\u6574\u79d2\u6570\u5c31\u53ef\u4ee5\u4e86\uff0c\u6240\u4ee5\u5c31\u76f4\u63a5\u7528\u8fd9\u79cd<\/p>\n

time_t currtime = time(0); <\/p>\n

\u6765\u83b7\u53d6\u65f6\u95f4\uff0c\u8fd9\u4e2a\u83b7\u53d6\u65f6\u95f4\u7684\u4ee3\u7801\u662f\u5728\u5355\u72ec\u7684\u4e00\u4e2a\u7ebf\u7a0b\u91cc\u4ee5 while(1) \u7684 loop \u8fdb\u884c\u7684\uff0c\u5f53\u7136\u4e5f\u6709 sleep\uff0c\u4e14\u4e0d\u6392\u9664\u5728\u5176\u4ed6\u7ebf\u7a0b\u4e2d\u4f1a\u5b58\u5728 time(0) \u540c\u65f6\u83b7\u53d6\u7cfb\u7edf\u65f6\u95f4\u3002<\/p>\n

\u540e\u6765\u5728\u6253\u5370\u7684\u65e5\u5fd7\u4e2d\u53d1\u73b0\u4e00\u4e2a\u95ee\u9898\uff0c\u5c31\u662f\u8fd9\u4e2a\u83b7\u53d6\u7684\u79d2\u6570\uff08\u6bcf\u95f4\u9694 10s \u83b7\u53d6\u4e00\u6b21\uff09\u4e00\u76f4\u90fd\u5f88\u6b63\u5e38\uff0c\u4f46\u662f\u4f1a\u6709\u51fa\u73b0\u7a81\u7136\u67d0\u4e00\u6b21\u83b7\u53d6\u7684\u79d2\u6570\u662f\u4e00\u4e2a\u660e\u663e\u7684\u5f02\u5e38\u503c\uff0c\u8f6c\u6362\u4e3a\u5e74\u6708\u65e5\u7684\u8bdd\u4f1a\u5dee\u4e86\u597d\u51e0\u5e74\u3002time()\u8fd9\u4e2a\u51fd\u6570\u5e94\u8be5\u4e5f\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u6240\u4ee5\u76ee\u524d\u8fd8\u662f\u6ca1\u6709\u641e\u6e05\u695a\u51fa\u73b0\u8fd9\u4e2a\u60c5\u51b5\u7684\u539f\u56e0\uff0c\u6709\u54ea\u4f4d\u5927\u795e\u6e05\u695a\u4e0d\uff1f\u6c42\u52a9<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (10<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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  • \n
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    \u8cc7\u6df1\u5927\u4f6c : linux40 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7ebf\u7a0b\u5b89\u5168\u662f POSIX \u7684\u8981\u6c42\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : wevsty <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7a81\u7136\u51fa\u73b0\u67d0\u4e2a\u6570\u5b57\u5f02\u5e38\uff0c\u4f60\u5e94\u8be5\u68c0\u67e5\u4e00\u4e0b\u662f\u4e0d\u662f\u5b58\u5728\u5185\u5b58\u8d8a\u754c\u7684\u60c5\u51b5\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zuoanyx <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wevsty \u5185\u5b58\u8d8a\u754c\u4e4b\u524d\u662f\u68c0\u67e5\u8fc7\u4e86\u7684\uff0c\u5e94\u8be5\u662f ok \u7684\uff0c\u5c31\u662f\u8fd9\u4e2a\u6570\u5b57\u5f02\u5e38\u4e00\u822c\u8868\u73b0\u4e3a\u4e4b\u524d\u83b7\u53d6\u4e86 1000 \u6b21\u90fd\u662f\u6b63\u5e38\u7684\u503c\uff0c\u7c7b\u4f3c 1611715150\uff0c\u7a81\u7136\u6709\u4e00\u6b21\u83b7\u53d6\u4e3a 1525415140\uff0c\u4e4b\u540e\u53c8\u83b7\u53d6\u4e86 1000 \u6b64\u4e5f\u90fd\u662f\u6b63\u5e38\u503c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : owenliang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5d4c\u5165\u5f0f\u7684\uff0c\u54b1\u4e0d\u597d\u8bf4\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : Huelse <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5d4c\u5165\u5f0f\u4e0d\u592a\u6e05\u695a\uff0c\u4f46 c++\u6211\u4e00\u822c\u4f1a\u7528 chrono \u5e93\uff0chttp:\/\/www.cplusplus.com\/reference\/chrono\/ <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : Huelse <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    C \u7684\u8bdd\u53ef\u4ee5\u770b\u8fd9\u4e2a http:\/\/www.cplusplus.com\/reference\/ctime\/time\/ <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : tienhua <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5206\u6790\u8fd9\u79cd\u95ee\u9898\u6700\u597d\u7ed9\u51fa\u65e5\u5fd7\u548c\u4ee3\u7801 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : laminux29 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd8\u6709 std::clock()\u5728\u865a\u62df\u5316\u7cfb\u7edf\u91cc\u7ecf\u5e38\u51fa\u95ee\u9898\u3002<\/p>\n

    \u8fd9\u4e24\u4e2a\u95ee\u9898\u7684\u672c\u8d28\u662f\uff0c\u73b0\u5728\u9ad8\u9636 c++\uff0c\u65f6\u95f4\u5904\u7406\u65b9\u9762\uff0c\u5927\u591a\u6570\u8f6c\u7528 chrono \u4e86\uff0c\u5c31\u7b97 chrono \u6709\u95ee\u9898\uff0c\u56e0\u4e3a\u7528\u7684\u4eba\u591a\uff0c\u5904\u7406\u5feb\uff0c\u89e3\u51b3\u65b9\u6848\u591a\u3002<\/p>\n

    \u800c time()\u3001std::clock()\u8fd9\u79cd\uff0c\u6b63\u597d\u76f8\u53cd\uff0c\u73b0\u5728\u57fa\u672c\u4e0a\u5f88\u5c11\u6709\u4eba\u7528\u4e86\uff0c\u66f4\u65b0\u540e\u9057\u7559 bug \u6216\u51fa\u95ee\u9898\uff0c\u6ca1\u4eba\u89e3\u51b3\uff0c\u4e5f\u5c31\u5f88\u6b63\u5e38\u4e86\u3002<\/p>\n

    IT \u754c\u8fd9\u79cd\u95ee\u9898\u5f88\u591a\uff0c\u6bd4\u5982\u5b89\u5353\uff0c\u8fd9\u7cfb\u7edf\u4e00\u5f00\u59cb\u5f88\u70c2\uff0c\u5f88\u591a\u57fa\u672c\u7ec4\u4ef6\u4e0e\u529f\u80fd\u90fd\u7f3a\u5931\u3002\u4f46\u662f\u67b6\u4e0d\u4f4f\u7528\u6237\u591a\uff0c\u5404\u79cd\u7f3a\u5931\u7ec4\u4ef6\u4e0e\u529f\u80fd\uff0c\u5c45\u7136\u9646\u9646\u7eed\u7eed\u5730\u88ab\u975e\u5b98\u65b9\u5f00\u53d1\u8005\uff0c\u89e3\u51b3\u5730\u5dee\u4e0d\u591a\u4e86… <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
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    \u8cc7\u6df1\u5927\u4f6c : js8510 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    c++ clock \u6709\u4e24\u79cd\u3002\u4e00\u79cd\u662f wall clock \u4e00\u79cd\u662f chrono clock. chrono clock \u662f\u4ece\u673a\u5668\u8d77\u6765\u4e4b\u540e\u5f00\u59cb count \u662f\u53ef\u4ee5\u51c6\u786e\u7684\u8ba1\u7b97\u65f6\u95f4\u5dee\u7684\u3002wall clock \u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u4e16\u754c\u7684\u65f6\u95f4\u3002\u95ee\u9898\u662f\u4e00\u5206\u949f\u4e0d\u662f 60s\uff0c\u5f53\u6da6\u5206\u949f\u7684\u65f6\u5019\u662f 61 \u79d2\u3002\u6240\u4ee5\u4ed6\u662f\u4e0d\u80fd\u7528\u6765\u51c6\u786e\u8ba1\u7b97\u65f6\u95f4\u5dee\u7684\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : zhongrs232 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u628a\u4e1a\u52a1\u903b\u8f91\u5168\u5e72\u6389\uff0c\u5199\u4e00\u4e2a main \u51fd\u6570\uff0c\u91cc\u9762\u53ea\u4fdd\u7559\u83b7\u53d6\u65f6\u95f4\u7684\u4ee3\u7801\uff0c\u770b\u770b\u6709\u6ca1\u6709\u95ee\u9898\uff0c\u6309\u6211\u7684\u7ecf\u9a8c\uff0c\u6000\u7591\u7f16\u8bd1\u5668\uff0c\u7cfb\u7edf\u8c03\u7528\uff0c\u6807\u51c6\u5e93\u6709\u95ee\u9898\uff0c\u4e00\u822c\u90fd\u4f1a\u88ab\u6253\u8138\uff0c\u53e6\u5916\uff0c\u4f60\u6709\u6ca1\u6709\u7528\u5230\u7c7b\u4f3c ctime\/gmtime \u4e4b\u7c7b\u7684\u51fd\u6570\uff0c\u8fd9\u4e9b\u51fd\u6570\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u8bf7\u95ee\u6709\u4eba\u77e5\u9053 c++\u91cc\u9762 time…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/312781"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=312781"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/312781\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=312781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=312781"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=312781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}