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// This code is for Chapter 2
// Reference to Listing 2.1
// 
// For compilation, using Intel compiler
// User must install Intel compiler, before running this code
//
// Possible compilation instructions:
//
// Windows: icl /Qopenmp -o Hello_World_omp Hello_World_omp.c
// Linux:   icc -openmp -o Hello_World_omp Hello_World_omp.c
// 
// Note: There is a Makefile in this package as well. 
//       The Makefile is used for both OpenMP and pthread examples. 

#include <stdio.h>
#include <omp.h>
int main()
{
    int threadID, totalThreads;
 /* OpenMP pragma specifies that following block is
    going to be parallel and the threadID variable is
    private in this openmp block. */
    #pragma omp parallel private(threadID)
    {
       threadID = omp_get_thread_num();
       printf("\nHello World is from thread %d\n",
              (int)threadID); 
       
	   /* Master thread has threadID = 0 */
       if (threadID == 0) {
           printf("\nMaster thread being called\n");
           totalThreads = omp_get_num_threads();
           printf("Total number of threads are %d\n",
                  totalThreads);
       }
   }

   return 0;

}