hello_pthread

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


#define MAX_THREADS 5


void *print_message(void *message)
{
    const char *msg = (char *) message;
    printf("%s!\n", msg);
    free(message);
    pthread_exit(NULL);
}


int main(int argc, char *argv[])
{
    const char *fmt = "Here is %d";
    pthread_t threads[MAX_THREADS];
    char *message;
    int i;

    for(i = 0; i < MAX_THREADS; ++i) {
        message = malloc(sizeof(char) * strlen(fmt));
        sprintf(message, fmt, i);
        if (pthread_create(&threads[i], NULL, print_message,
                (void *) message)) {
            fprintf(stderr,
                "[ERROR]: while creating thread %d\n", i);
            exit(EXIT_FAILURE);
        }
    }

    return EXIT_SUCCESS;
}