Separate Focus HTML for Basic Foil 15 Hello World in C plus MPI

Basic HTML version of Foils prepared 10 Oct 1995

Foil 15 Hello World in C plus MPI

From Fox Presentation Fall 1995 CPS615 Basic Simulation Track for Computational Science -- Fall Semester 95. by Geoffrey C. Fox

1	#include <stdio.h>
2	#include <mpi.h>
3	*void main(int argc,char argv[])**
4	{ int ierror, rank, size MPI_Init(&argc, &argv); # Initialize MPI_Comm_rank(MPI_COMM_WORLD, &rank); # Find Processor Number if( rank == 0) printf ("hello World!\n"); ierror=MPI_Comm_size(MPI_COMM_WORLD, &size); if( ierror != MPI_SUCCESS ) # Find Total number of processors above MPI_Abort(MPI_COMM_WORLD,ierror); # Abort printf("I am processor %d out of total of %d\n", rank, size); MPI_Finalize(); # Finalize
5	}