Java开发网 - 浮点数,分别输出整数和小数部分,

Java开发网

您没有登录

» Java开发网 » Java SE 综合讨论区

打印话题 寄给朋友 订阅主题

作者	浮点数,分别输出整数和小数部分,
kimyier 发贴: 2 积分: 0	于 2005-07-08 21:11 import java.io.*; public class dx{ public static void main(String args[]){ double k=43535.6455; String s,sf,se; s=""+k; int i; i=s.indexOf('.'); sf=s.substring(0,i-1); se=s.substring(i+1); System.out.println(sf); System.out.println("0."+se); } } 输出结果为: 54 0.57899857 不知道为什么会这样?请指教.

作者

Re:浮点数,分别输出整数和小数部分, [Re:kimyier]

ranchgirl

版主

发贴: 801
积分: 132

于 2005-07-08 21:25

整数部分: System.out.println((int)k);
小数部分:System.out.println(k-(int)k);

If you only want the digits of 小数部分, then
String s = "" + (k-(int)k);
System.out.println(s.substring(2));

BTW, please don't use k as double or float names.

i, j, k are used as int variable names by programmers since FORTRAN time, we should respect the tradition or history.

In FORTRAN, they are automatic as integers. FORTRAN is the first high level language in history (1950's) Smile

FORTRAN is still the most efficient high level language in scientific calculation.

FORTRAN is still used in NASA space shuttle programs. It is them who sent men on the moon!!!

gongshi edited on 2005-07-08 22:06

已读帖子

新的帖子

被删除的帖子