{"id":361812,"date":"2021-02-21T18:16:32","date_gmt":"2021-02-21T10:16:32","guid":{"rendered":"http:\/\/4563.org\/?p=361812"},"modified":"2021-02-21T18:16:32","modified_gmt":"2021-02-21T10:16:32","slug":"php-%e6%b5%ae%e7%82%b9%e6%95%b0%ef%bc%8c%e4%b8%ba%e4%bb%80%e4%b9%88-1890-100-100-%e7%bb%93%e6%9e%9c%e4%b8%ba%e6%ad%a3%e7%a1%ae%e5%80%bc-1890%ef%bc%8c%e4%bd%86%e6%98%af-floor1890-100-100","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=361812","title":{"rendered":"PHP \u6d6e\u70b9\u6570\uff0c\u4e3a\u4ec0\u4e48 1890 \/ 100 * 100 \u7ed3\u679c\u4e3a\u6b63\u786e\u503c 1890\uff0c\u4f46\u662f floor(1890 \/ 100 * 100)\u7ed3\u679c\u4e3a 1889\uff1f"},"content":{"rendered":"
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PHP \u6d6e\u70b9\u6570\uff0c\u4e3a\u4ec0\u4e48 1890 \/ 100 * 100 \u7ed3\u679c\u4e3a\u6b63\u786e\u503c 1890\uff0c\u4f46\u662f floor(1890 \/ 100 * 100)\u7ed3\u679c\u4e3a 1889\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : UnrealEngine <\/span> <\/i> 6<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u6211\u77e5\u9053 php \u6d6e\u70b9\u6570\u6709\u5bf9\u5e94\u7684\u8ba1\u7b97\u51fd\u6570\uff0c\u4f46\u662f\u4e0a\u9762\u8fd9\u4e2a\u4f8b\u5b50\u8fd8\u662f\u4e0d\u77e5\u9053\u539f\u56e0<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (11<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zpfhbyx <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    bcmath \u5904\u7406\u8fd9\u4e2a\u95ee\u9898\uff0c \u7136\u540e\u8fd9\u4e2a\u4e0d\u662f php \u7684\u95ee\u9898\uff0c\u90fd\u6709\u8fd9\u4e2a\u95ee\u9898\uff0cGoogle \u4e00\u4e0b \u6d6e\u70b9\u6570\u9677\u9631 <\/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\u7ed3\u679c\u662f 1889.9999 \u4f60 floor \u4e00\u4e0b\u5f53\u7136\u5c31\u628a 0.9999 \u5e72\u6389\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : markgor <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u770b\u4f3c\u6709\u7a77\u7684\u5c0f\u6570, \u5728\u8ba1\u7b97\u673a\u7684\u4e8c\u8fdb\u5236\u8868\u793a\u91cc\u5374\u662f\u65e0\u7a77\u7684<\/p>\n

    var_dump((1890\/100*100) == 1890);\/\/<====false
    var_dump(1890\/100*100);\/\/float
    var_dump(1890);\/\/int<\/p>\n

    \u4f60\u53ef\u4ee5\u628a\u4ed6\u4eec\u8f6c\u4e3a 2 \u8fdb\u5236\uff0c\u518d\u8f6c\u56de 10 \u8fdb\u5236\u770b\u8fc7\u7a0b <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : weirdo <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6d4f\u89c8\u5668\u6253\u5f00 console
    \u8f93\u5165 1890\/100*100 \u56de\u8f66 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zagreb <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u662f\u4e0d\u662f\u8981\u8fd9\u6837\u53d6\u6574\uff1f
    floor(x – 0.5) + 1 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zagreb <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zagreb
    \u54e6\u3002\u6709 round() \u51fd\u6570\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : JJstyle <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u201c\u4e3a\u4ec0\u4e48 1890 \/ 100 * 100 \u7ed3\u679c\u4e3a\u6b63\u786e\u503c 1890\u201d \u5c31\u4e0d\u5bf9<\/p>\n

    > 1890\/100 * 100
    > 1889.9999999999998 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Phariel <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    IEEE 754 \u597d\u597d\u5b66\u4e60\u4e00\u4e0b <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dongisking <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e2a\u662f\u7cbe\u5ea6\u635f\u5931\u7684\u95ee\u9898\uff0c\u5fc5\u987b\u7528 bcmath \u3002
    https:\/\/www.cnblogs.com\/datang6777\/p\/7049159.html <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wh1012023498 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    IEEE754 \u6807\u51c6, \u9075\u5faa\u8fd9\u4e2a\u6807\u51c6\u7684\u90fd\u6709\u8fd9\u4e2a\u95ee\u9898\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : sorshion <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    https:\/\/www.laruence.com\/2013\/03\/26\/2884.html <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    PHP \u6d6e\u70b9\u6570\uff0c\u4e3a\u4ec0\u4e48 1890 …<\/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\/361812"}],"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=361812"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/361812\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=361812"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=361812"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=361812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}