Basic HTML version of Foils prepared
10 Oct 1995
Foil 28 Hello World:C Example of Broadcast
From
Fox Presentation Fall 1995 CPS615 Basic Simulation Track for Computational Science --
Fall Semester 95
.
by
Geoffrey C. Fox
#include "mpi.h"
main( int argc, char **argv )
{
char message[20];
int rank;
MPI_Init (&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank); # Who is this processor
if( rank == 0 ) # We are on "root" -- Processor 0
strcpy(message,"Hello MPI World"); # Generate message
# MPI_Bcast sends from root=0 and receives on all other processors
MPI_Bcast(message,20, MPI_CHAR, 0, MPI_COMM_WORLD);
printf("This is a message from node %d saying %s\n", rank,
message);
MPI_Finalize();
}
©
on Tue Oct 7 1997
Basic HTML version of Foils prepared 10 Oct 1995
