why core dumped error occurs with openmp (C language)

Question

I'm a starter for openmp. I wrote very very simple code like below. when I compile that code and implement ./a.out, 'Segmentation fault (core dumped)' occurs. Why core dumped in this simple code?

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

int main(void){

    #pragma omp parallel
    {printf("thread num %d: first hello world!
",omp_get_thread_num());
    printf("thread num %d; second hello world!
",omp_get_thread_num());
    }
    return 0;
}

Answer 1

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