{"id":159781,"date":"2020-09-21T14:27:33","date_gmt":"2020-09-21T06:27:33","guid":{"rendered":"http:\/\/4563.org\/?p=159781"},"modified":"2020-09-21T14:27:33","modified_gmt":"2020-09-21T06:27:33","slug":"go-%e8%af%ad%e8%a8%80-%e6%9c%89%e5%be%88%e5%a4%9a%e4%bd%8d%e5%b0%8f%e6%95%b0%e7%9a%84-big-float-%e8%bd%ac%e6%8d%a2%e6%88%90-string-%e7%b1%bb%e5%9e%8b%e5%a6%82%e4%bd%95%e4%b8%8d%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=159781","title":{"rendered":"go \u8bed\u8a00 \u6709\u5f88\u591a\u4f4d\u5c0f\u6570\u7684 big.Float \u8f6c\u6362\u6210 string \u7c7b\u578b\u5982\u4f55\u4e0d\u4f7f\u7528\u79d1\u5b66\u8ba1\u6570\u6cd5\u3002"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  go \u8bed\u8a00 \u6709\u5f88\u591a\u4f4d\u5c0f\u6570\u7684 big.Float \u8f6c\u6362\u6210 string \u7c7b\u578b\u5982\u4f55\u4e0d\u4f7f\u7528\u79d1\u5b66\u8ba1\u6570\u6cd5\u3002               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : rimutuyuan <\/span>  <span><i><\/i> 5<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\">                        res, _ := new(big.Float).SetString(&#8220;100000000000&#8221;)<br \/>res = res.Quo(res, big.NewFloat(1e18))<br \/>fmt.Println(res.String())<\/p>\n<p>\u8f93\u51fa 1e-07<\/p>\n<p>\u5982\u4f55\u8f93\u51fa 0.000001 \u5462      <\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>2<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"3440254\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : luwill <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             https:\/\/golang.org\/src\/math\/big\/ftoa.go<\/p>\n<p>\u8bfb\u4e00\u4e0b math\/big \u7684\u6e90\u4ee3\u7801\uff0c\u4f60\u4f1a\u53d1\u73b0 String \u8c03\u7528\u7684 Text \u65b9\u6cd5\u3002<br \/>&#8220;`<br \/>\/\/ String formats x like x.Text(&#8216;g&#8217;, 10).<br \/>\/\/ (String must be called explicitly, Float.Format does not support %s verb.)<br \/>func (x *Float) String() string {<br \/> return x.Text(&#8216;g&#8217;, 10)<br \/>}<br \/>&#8220;`<br \/>Text \u652f\u6301 formt \u53c2\u6570\uff0c\u4f60\u8981\u7684`res.Text(&#8216;f&#8217;, 10)`<\/p>\n<p>\/\/ &#8216;f&#8217; -ddddd.dddd, no exponent                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3440255\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : lysS <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u4f60\u53ef\u4ee5\u7528\u8fd9\u4e2a<br \/>a := 0.0000001<br \/>fmt.Println(strconv.FormatFloat(float64(a), &#8216;f&#8217;, 9, 64))<br \/>\/\/<br \/>0.000000100                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>go \u8bed\u8a00 \u6709\u5f88\u591a\u4f4d\u5c0f\u6570\u7684 big&hellip;<\/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\/159781"}],"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=159781"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/159781\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=159781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=159781"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=159781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}