需要加omp.h这个库,编译的时候加-fopenmp
参数:
并行执行的代码在
#pragma omp parallel
{
}
代码块里,如果要将for循环拆分多个线程执行,则在for循环前加#pragma omp parallel for
#include <stdio.h>
#include <omp.h>
int main()
{
#pragma omp parallel for
for (int i = 0; i < 6; i++) {
printf("i=%d, 线程编号=%d\n", i, omp_get_thread_num());
}
return 0;
}