{"id":152205,"date":"2020-09-07T06:13:18","date_gmt":"2020-09-06T22:13:18","guid":{"rendered":"http:\/\/4563.org\/?p=152205"},"modified":"2020-09-07T06:13:18","modified_gmt":"2020-09-06T22:13:18","slug":"%e6%b5%ae%e7%82%b9%e6%95%b0%e7%b2%be%e5%ba%a6%e9%97%ae%e9%a2%98%e6%b1%82%e8%a7%a3%ef%bc%8c%e6%af%94%e5%a6%82-floor297-9-100-100-%e4%b8%ba%e4%bb%80%e4%b9%88%e4%bc%9a%e5%8f%98%e6%88%90-297-89","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=152205","title":{"rendered":"\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u6c42\u89e3\uff0c\u6bd4\u5982 floor(297.9 * 100) \/ 100 \u4e3a\u4ec0\u4e48\u4f1a\u53d8\u6210 297.89\uff1f"},"content":{"rendered":"
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\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u6c42\u89e3\uff0c\u6bd4\u5982 floor(297.9 * 100) \/ 100 \u4e3a\u4ec0\u4e48\u4f1a\u53d8\u6210 297.89\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : UnrealEngine <\/span> <\/i> 11<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u7528 floor \u4f1a\u51fa\u73b0\u8fd9\u79cd\u95ee\u9898\uff0c\u4f46\u662f round \u5c31\u6ca1\u4e8b<\/p>\n

\u4f46\u662f\u5176\u4ed6\u6d6e\u70b9\u6570\u6211\u4e5f\u8bd5\u4e86\u4e0b floor \u6b63\u5e38<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (14<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ClarkAbe <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8ba1\u7b97\u673a\u6d6e\u70b9 0.1+0.2 \u4e0d\u7b49\u4e8e 0.3 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ClarkAbe <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u597d\u5427\u2026\u2026\u773c\u775b\u5feb\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : UnrealEngine <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ClarkAbe 297.9 \u4f1a\u51fa\u73b0 297.89 \uff0c\u4f46\u662f 1297.9 \u5c31\u6ca1\u95ee\u9898\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : cheng6563 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6d6e\u70b9\u6570 k \u9ed8\u8ba4\u7b97\u4e0d\u51c6\u5427\uff0c\u4e0d\u8981\u9760\u78b0\u5de7\u4e86\u3002
    \u6982\u7387\u4ec0\u4e48\u7684\u7528\u7528\u6d6e\u70b9\u6570\u8fd8\u884c, \u5176\u4ed6\u5730\u65b9\u5c31\u4e0d\u8981\u7528\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : misaka19000 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    IEEE754 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mxT52CRuqR6o5 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8bd5\u4e00\u4e0b\u5c31\u77e5\u9053\u4e86
    floor(297.9 * 100)\u548c round(297.9 * 100)\u7684\u7ed3\u679c\u5c31\u5df2\u7ecf\u4e0d\u4e00\u6837\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jimages <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u56e0\u4e3a 297.9 * 100 = 29789.999999999996 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : UnrealEngine <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @jimages \u819c\u62dc\u5927\u4f6c~~~~ <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u56e0\u4e3a\u8ba1\u7b97\u673a\u65e0\u6cd5\u7528\u6709\u9650\u4f4d\u6570\u6d6e\u70b9\u6765\u5b58\u50a8 297.9 \u3002<\/p>\n

    \u6700\u63a5\u8fd1\u7684\u53ef\u4ee5\u7528 IEEE-754 \u8868\u793a\u7684\u6570\uff0c\u662f 297.899993896484375 \u3002
    \u4ed6\u4e0b\u4e00\u4e2a\u53ef\u4ee5\u7528 IEEE-754 \u8868\u793a\u7684\u6570\uff0c\u662f 297.9000244140625 \u3002
    \u53ef\u4ee5\u770b\u5230\uff0c297.9 \u662f\u4e00\u4e2a\u65e0\u6cd5\u5b58\u50a8\u7684\u6570\u5b57\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : lovecy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7cbe\u5ea6\u95ee\u9898\u4e0a\u9762\u5927\u4f6c#9 \u8bf4\u5f97\u5f88\u6e05\u695a\u4e86\u3002\u53e6\u5916 floor \u5411\u4e0b\u53d6\u6574\uff0c\u8fd4\u56de float \uff1b round \u56db\u820d\u4e94\u5165\uff0c\u8fd4\u56de float \u3002\u5bf9\u4e8e 297.9\uff0c\u4e24\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u672c\u6765\u5c31\u4e0d\u4e00\u6837\uff0c\u4e0d\u77e5\u9053\u4f60\u8fd9\u91cc\u4e3a\u5565\u8981\u7528\u8fd9\u91cc\u4fe9\u5bf9\u6bd4\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ClutchBear <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8ba1\u7b97\u673a\u6d6e\u70b9\u6570\u5b58\u50a8\u673a\u5236\u7684\u95ee\u9898 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : b00tyhunt3r <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    floating-point-gui.de\/errors\/comparison\/ <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : a7217107 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    IEEE754 \u6708\u7ecf\u8d34 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : CodeCodeStudy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u7528 var_export(297.9 * 100); \u5c31\u77e5\u9053\u4e86\uff0c\u5f97\u5230\u7684\u662f 29789.999999999996 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u6c42\u89e3\uff0c\u6bd4\u5982 floo…<\/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\/152205"}],"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=152205"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/152205\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=152205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=152205"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=152205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}