Java开发网 - 看不懂的double

Topic: 看不懂的double

1.看不懂的double	Copy to clipboard
Posted by: aiff Posted on: 2004-09-18 17:30 public class yuan{ public static void main(String args[]) { double s,r=10,pi=3.1415; s=pirr; System.out.println("the s is "+s); } } 答案是

2.Re:看不懂的double [Re: aiff]	Copy to clipboard
Posted by: 牛老板 Posted on: 2004-09-18 18:01 浮点是非精确的实数. 可以使用java.text.DecimalFormat得到你期望的有效数字.

3.Re:看不懂的double [Re: aiff]	Copy to clipboard
Posted by: liuyongsu Posted on: 2004-09-19 07:53 确实，浮点数总是要丢失精度的。