兄弟们啊，帮我看看我的泊松分布生成随机数

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void)
{
long cls_random::random Possion(double lambda)
{
    double x = -1, u;  
    double log1, log2;
    log1 = 0;
    log2 = -lambda;
    do
    {
        u = cls_random::randomUniform();   
        log1 += log(u);
        x++;   
    }while(log1 >= log2);
    return x;   
}
}