相关疑难解决方法(0)

我试着写一些非常快速计算随机数的东西,可以应用于多个线程.我目前的代码是:

/* Approximating PI using a Monte-Carlo method. */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <omp.h>
#define N 1000000000  /* As lareg as possible for increased accuracy */

double random_function(void);

int main(void)
{
   int i = 0;
    double X, Y;
   double count_inside_temp = 0.0, count_inside = 0.0;
   unsigned int th_id = omp_get_thread_num();
   #pragma omp parallel private(i, X, Y) firstprivate(count_inside_temp)
   {
      srand(th_id);
      #pragma omp for schedule(static)
      for (i = 0; i <= N; i++) {
         X = 2.0 …