{"id":68620,"date":"2020-07-23T04:46:56","date_gmt":"2020-07-22T20:46:56","guid":{"rendered":"http:\/\/www.xiaoyebailong.com\/?p=68620"},"modified":"2020-07-23T04:46:58","modified_gmt":"2020-07-22T20:46:58","slug":"%e5%b0%8f%e7%a8%8b%e5%ba%8f%e4%bf%9d%e7%95%99%e4%b8%a4%e4%bd%8d%e5%b0%8f%e6%95%b0%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"http:\/\/www.xiaoyebailong.com\/index.php\/2020\/07\/23\/68620.htm","title":{"rendered":"\u5c0f\u7a0b\u5e8f\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u65b9\u6cd5"},"content":{"rendered":"\n<p>1.\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u51e0\u4f4d\u5c0f\u6570\uff0c\u76f4\u63a5\u7528.toFixed()\u5373\u53ef.\u62ec\u53f7\u5185\u7684\u6570\u5b57\u8868\u793a\u4fdd\u7559\u7684\u4f4d\u6570.\u5982\u679c\u662f\u6574\u6570,\u5c31\u4f1a\u4e0d\u4e0a0\uff0c<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20190410113027639.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyMDc5Mzcx,size_16,color_FFFFFF,t_70\" alt=\"\"\/><\/figure>\n\n\n\n<p>2.\u83b7\u53d6\u51e0\u4f4d\u6570 toPrecision()<\/p>\n\n\n\n<p>\u65b9\u6cd5\u4e00\uff1a\u6307\u5b9a\u8981\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570(0.1+0.2).toFixed(1) = 0.3;\u8fd9\u4e2a\u65b9\u6cd5toFixed\u662f\u8fdb\u884c\u56db\u820d\u4e94\u5165\u7684\u4e5f\u4e0d\u662f\u5f88\u7cbe\u51c6\uff0c\u5bf9\u4e8e\u8ba1\u7b97\u91d1\u989d\u8fd9\u79cd\u4e25\u8c28\u7684\u95ee\u9898\uff0c\u4e0d\u63a8\u8350\u4f7f\u7528\uff0c\u800c\u4e14\u4e0d\u901a\u6d4f\u89c8\u5668\u5bf9toFixed\u7684\u8ba1\u7b97\u7ed3\u679c\u4e5f\u5b58\u5728\u5dee\u5f02\u3002<\/p>\n\n\n\n<p>\u65b9\u6cd5\u4e8c\uff1a\u628a\u9700\u8981\u8ba1\u7b97\u7684\u6570\u5b57\u5347\u7ea7\uff08\u4e58\u4ee510\u7684n\u6b21\u5e42\uff09\u6210\u8ba1\u7b97\u673a\u80fd\u591f\u7cbe\u786e\u8bc6\u522b\u7684\u6574\u6570\uff0c\u7b49\u8ba1\u7b97\u5b8c\u6bd5\u518d\u964d\u7ea7\uff08\u9664\u4ee510\u7684n\u6b21\u5e42\uff09\uff0c\u8fd9\u662f\u5927\u90e8\u5206\u7f16\u7a0b\u8bed\u8a00\u5904\u7406\u7cbe\u5ea6\u5dee\u5f02\u7684\u901a\u7528\u65b9\u6cd5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/20190410112831512.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyMDc5Mzcx,size_16,color_FFFFFF,t_70\" alt=\"\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1.\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u51e0\u4f4d\u5c0f\u6570\uff0c\u76f4\u63a5\u7528.toFixed()\u5373\u53ef.\u62ec\u53f7\u5185\u7684\u6570\u5b57\u8868\u793a\u4fdd\u7559\u7684\u4f4d\u6570.\u5982\u679c\u662f\u6574\u6570,\u5c31\u4f1a\u4e0d\u4e0a0\uff0c 2.\u83b7\u53d6\u51e0\u4f4d\u6570 toPrecision() \u65b9\u6cd5\u4e00\uff1a\u6307\u5b9a\u8981\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570(0.1+0.2).toFixed(1) = 0.3;\u8fd9&#8230;<\/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":[],"topic":[],"class_list":["post-68620","post","type-post","status-publish","format-standard","hentry","category-wx"],"_links":{"self":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/68620","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/comments?post=68620"}],"version-history":[{"count":1,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/68620\/revisions"}],"predecessor-version":[{"id":68621,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/68620\/revisions\/68621"}],"wp:attachment":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/media?parent=68620"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/categories?post=68620"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/tags?post=68620"},{"taxonomy":"topic","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/topic?post=68620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}