Openmp并行计算 入门程序

Posted 2021-07-23 各可

Openmp并行计算 入门程序

#include <iostream>
#include "omp.h"
int main(int argc, char *argv[])
{
   int nthreads, tid;
   int nprocs;
   char buf[32];
   /*     Fork a team of threads      */
#pragma omp parallel private(nthreads, tid)
   {
      /*     Obtain and print thread id  */
      tid = omp_get_thread_num();
      printf("Hello World from OMP thread %d\\n", tid);
      /*     Only master thread does this  */
      if (tid == 0)
      {
         nthreads = omp_get_num_threads();
         printf("Number of threads %d\\n", nthreads);
      }
   }
   return 0;
}

编译运行结果如下：

使用的编译器是g++；工具借助vscode；大家也可以使用visual studio配置一下openmp就行。
进一步体会Openmp计算π