#include <mpi.h>
#include <stdio.h>

int main(argc, argv)
int argc;
char **argv;
{
    int myid, numprocs;     char name[256];     int resultlen;

    MPI_Init(&argc, &argv);
    MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
    MPI_Comm_rank(MPI_COMM_WORLD,&myid);

    if(myid==0) printf("This program is running on %d processes\n", 
                        numprocs);

    MPI_Get_processor_name(name, &resultlen); 

    MPI_Barrier(MPI_COMM_WORLD); 
         
    printf("From Process-%d/%d: Hello MPI world! I am running on %s \n ", myid,numprocs, name);


    MPI_Finalize();
 
    return 0;
}