ParallelAdder.c

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

void printHostName();

int main(int argc, char **argv) {
	
	int rank;
	int number[] = {10, 20, 30, 40, 50, 60};
	int slave = 0;
	int master = 0;
	
	MPI_Init(&argc, &argv);
	MPI_Comm_rank(MPI_COMM_WORLD, &rank);
	MPI_Status status;
	
	if (rank==0) {	//slave pc
		int i;
	
		for(i=0; i<3; i++){
			slave += number[i];
		}
		printHostName();
		printf("\n %d \n", slave);
		
		MPI_Send(&slave, 1, MPI_INT, 1, 123, MPI_COMM_WORLD);
	}
	else if(rank==1) {	//master pc
		int i;
	
		for(i=3; i<6; i++){
			master += number[i];
		}
		printHostName();
		printf("\n %d \n", master);
		
		MPI_Recv(&slave, 1, MPI_INT, 0, 123, MPI_COMM_WORLD, &status);
		
		master += slave;
		
		printf("\n\n\n %d", master);
	}
	
	MPI_Finalize();
	
	return 0;
}


void printHostName(){
    char hostname[1024];
    gethostname(hostname, 1024);
    puts(hostname);

    return;
}