11.cpp

10 Mpi source examples for begginers

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



int main(int argc, char* argv[]){
	double x[100];
	double TotalSum, ProcSum = 0.0, t1, t2, dev1,dev2, PartSum;
	int  ProcRank, ProcNum, N=100, k, i1, i2;
	MPI_Status Status;
	MPI_Init(&argc,&argv); 
	MPI_Comm_size(MPI_COMM_WORLD,&ProcNum); 
	MPI_Comm_rank(MPI_COMM_WORLD,&ProcRank);

	if ( ProcRank == 0 ) 
	{
		for (int i=0; i<N; i++)
		{
			x[i]=rand()%1000;
		printf("+ %1.0f ",x[i]);
		}
		printf("=");
	}

	
	MPI_Bcast(x, N, MPI_DOUBLE, 0, MPI_COMM_WORLD);

	// 蔓麒耠屙桢 鬣耱梓眍