c - C随机数生成器

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                                7年前关闭。
            
                    
我编写了以下代码以在C中生成随机数。

int main (int argc, char *argv[])
{
    unsigned int iseed = (unsigned int)time(NULL);
    srand (iseed);

    /* Generate random number*/
    int i;
    for (i = 0; i < 1; i++)
    {
        printf ("Random[%d]= %u\n", i, rand ());
    }
    return 0;
}

输出给我一个10位数的随机数，如何更改输出中打印的位数？

最佳答案

rand()为您提供一个介于0和RAND_MAX之间的数字，该数字可能很大。

如果要在[0, N)范围内获得均匀样本，则需要将范围划分为多个区域：

int my_max = (RAND_MAX / N) * N;

int result;

while ((result = rand()) >= my_max) { } // #1

return result % N;

#1行中的条件很少会得到满足，但是如果结果不在N的倍数范围内，我们需要重新滚动，以免偏向于高结果。

关于c - C随机数生成器，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/12400320/