Topic: 怎么让2个long型数相除得到double型?

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1.怎么让2个long型数相除得到double型? Copy to clipboard
Posted by: ysonic
Posted on: 2005-06-17 15:16

怎么让2个long型数相除得到double型?
试了一下午都不行,烦死了.
2.Re:怎么让2个long型数相除得到double型? [Re: ysonic] Copy to clipboard
Posted by: ysonic
Posted on: 2005-06-17 15:26

例如让 2/5=0.4而不是0
3.Re:怎么让2个long型数相除得到double型? [Re: ysonic] Copy to clipboard
Posted by: linux_china
Posted on: 2005-06-17 15:49

(0.0+2)/5 or (double)2/5
4.Re:怎么让2个long型数相除得到double型? [Re: ysonic] Copy to clipboard
Posted by: menzy
Posted on: 2005-06-17 15:55

首先对一个数据进行强制转换
5.Re:怎么让2个long型数相除得到double型? [Re: ysonic] Copy to clipboard
Posted by: happyboyandgirl
Posted on: 2005-06-17 20:54

你看这样行吗？
long x=2,y=5;
double z;
z=(double)(x/y);
6.Re:怎么让2个long型数相除得到double型? [Re: happyboyandgirl] Copy to clipboard
Posted by: why
Posted on: 2005-06-17 21:12

happyboyandgirl wrote:
你看这样行吗？
long x=2,y=5;
double z;
z=(double)(x/y);

For sure not! (x/y) is a long division and results in 0; (double)0 is still 0.
z = (double)x/y;
7.Re:怎么让2个long型数相除得到double型? [Re: ysonic] Copy to clipboard
Posted by: ysonic
Posted on: 2005-06-17 22:34

3x

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