#include "mpi.h"
#include <stdio.h>
int main( int argc, char **argv ){
 int rank, size;
 MPI_Init( &argc, &argv );
 MPI_Comm_rank( MPI_COMM_WORLD, &rank );
 MPI_Comm_size( MPI_COMM_WORLD, &size );
 char processor_name[MPI_MAX_PROCESSOR_NAME];
 int name_len;
 MPI_Get_processor_name(processor_name,&name_len);

 printf( "Hello world form %s, rank  %d out of %d proc\n",processor_name,rank, size );

 MPI_Finalize();
 return 0;
}