急急急!!!!!!!各位大侠们帮帮忙,在C++中如何才能用rand()返回一个0-1之间的随机值????????

[zhze]

谢谢了!

[proware]

别急,可能你要重写之,因为他返回一个整数

[zhouwander]

The rand function returns a pseudorandom integer in the range 0 to RAND_MAX. Use the srand function to seed the pseudorandom-number generator before calling rand.
可以 如下写：

#define RAND_MAX 10
float MyRand()
{
srand(RAND_MAX);
return static_cast<float>(rand()) / 10.0;
}

[Behard]

使用 random()

[Behard]

Math.random
Class Overview | Class Members | This Package | All Packages

Syntax
public static synchronized double random()
Returns
a pseudorandom double between 0.0 and 1.0.
Description
Returns a random number between 0.0 and 1.0. Random number generators are often referred to as pseudorandom number generators because the numbers produced tend to repeat themselves after a period of time.

[Paris_Luo]

float a = ( (float)rand() )/RAND_MAX;

[cafeeee]

rand()%1024/1024.0

[超级管理员9527]

float a = ( (float)rand() )/RAND_MAX;

[enoloo]

#include<stdlib.h>
#include<time.h>
srand(time(0));


float a=((float)rand())/RAND_MAX;
其中RAND_MAX是已定的产生随机树的最大的.具体可以看看msdn.