hello_world.c

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

int thread_count;

void *Hello(void* rank){
    long my_rank = (long) rank;

    printf("Hello from thread %1ld of %d\n", my_rank, thread_count);

    return NULL;
}

int main(int argc, char* argv[]) {
    long thread;
    pthread_t* thread_handles;

    thread_count = strtol(argv[1], NULL, 10);

    thread_handles = malloc (thread_count*sizeof(pthread_t));

    for (thread = 0; thread < thread_count; thread++)
        pthread_create(&thread_handles[thread], NULL, Hello, (void*) thread);

    printf("Hello from the main thread\n");
    printf("%d", strcmp("Member", "Member"));

    for (thread = 0; thread < thread_count; thread++)
        pthread_join(thread_handles[thread], NULL);

    free(thread_handles);
    
    return 0;
} /* simple concurrent program */