paradigma comput paralela

hello.c

#include <stdio.h>
#ifdef _OPENMP
#include <omp.h>
#else
#define omp_get_thread_num() 0
#endif

int main(){
    #pragma omp parallel
    {
        int id_omp = omp_get_thread_num();
        long int id_sys = (long int) pthread_self();
        printf("Thread[%d,%lu]:Hello World!!!\n",id_omp,id_sys);
    }
    return 0;
}