/******************************************************************************
* FILE: hellox.c
* DESCRIPTION:
*   A "hello world" Pthreads program.  Demonstrates thread creation and
*   termination.
* AUTHOR: Blaise Barney
* LAST REVISED: 04/05/05
******************************************************************************/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>

void *PrintHello(void *threadid)
{
   printf("\n%d: Hello World!\n", threadid);
   pthread_exit(NULL);
}

int main(int argc, char *argv[])
{if (argc<2) {
  printf("Form: hellox <# threads>\n");
  exit(1);
 }
 int numThreads=atoi(argv[1]);
 pthread_t *threads=malloc(sizeof(pthread_t)*numThreads);
 int rc, t;
 for(t=0;t<numThreads;t++){
  printf("Creating thread %d\n", t);
  rc = pthread_create(&threads[t], NULL, PrintHello, (void *)t);
  if (rc){
    printf("ERROR; return code from pthread_create() is %d\n", rc);
    exit(-1);
  }
 }
 pthread_exit(NULL);
}