openmp测试程序

#include <stdio.h>
#include <unistd.h>
#include <omp.h>

void main() {
  int j;

  //#pragma omp parallel for
  //#pragma omp taskwait
  //#pragma omp barrier
  //#pragma omp for ordered 
  //#pragma omp parallel for num_threads(40)  

  omp_set_num_threads(40);
  #pragma omp parallel for

  for(j=1;j<41;j++){
     printf("j=%d.\n",j);
     if( j % 2 == 0)
         //printf("j=%d.\n",j);
         sleep(j);
  }
  printf("OK!\n");
  sleep(100);
}

gcc -fopenmp -o hello hello.c 

（aix机器需要显示指定库-lgomp）