//
// Hello World
//
#include <omp.h>
#include <stdio.h>

// #define NUM_THREADS 4

int main()
{
    int nthreads=4, tid=10; 

    // Fork a team of threads
    #pragma omp parallel private(tid,nthreads) // private(nthreads,tid)
    {
        tid=omp_get_thread_num(); // Obtain thread id
        printf("Hello world from OpenMP thread %d\n", tid);
        
        if (tid==0) // Only master thread does this 
        {
            nthreads=omp_get_num_threads(); // Obtain the number of threads
            printf("Number of threads: %d\n", nthreads);
        }
    }

    printf("\noutside:\n"); 
    printf("nthreads=%d, tid=%d\n", nthreads,tid); 
    
    return 0;
}