1
可能重複:
Is JavaScript's Math broken?
Elegant workaround for JavaScript floating point number problemJavaScript變量操縱
,當我運行下面的代碼
<html>
<head>
<script type="text/javascript">
var a=0.1;
var b=0.2;
var c=0.3;
document.write((a+b)+c);
document.write(' ');
document.write(a+(b+c));
document.write(' ');
document.write(a+b);
</script>
</head>
<body>
</body>
</html>
它顯示我follwoing結果
0.6000000000000001 0.6 0.30000000000000004
我不明白如何a+b=0.30000000000000004
也0.30000000000000004 + 0.3如何等於0.6?
[什麼每臺計算機科學家應該知道關於浮點運算(http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg你的問題。 HTML) – 2012-04-20 11:06:53