www.pudn.com > MPI.rar > mpi.cpp

#include  
#include 
#include  
#define  totalsize 256 
#define  mysize (totalsize/4) 
void main(int argc,char *argv[]) 
{ 
   int steps=13; 
   int myid,numprocs,i,j,n; 
   float a[mysize+2][totalsize]; 
   float b[mysize+2][totalsize]; 
   int begin_row; 
   int end_row; 
   int top,down; 
   int tag1,tag2; 
   MPI_Status status; 
   MPI_Init(&argc,&argv); 
   MPI_Comm_rank(MPI_COMM_WORLD,&myid); 
   MPI_Comm_size(MPI_COMM_WORLD, &numprocs); 
   cout<< "Process "<<' '<0) 
   { 
	  top=myid-1; 
   } 
   else 
   { 
	  top=MPI_PROC_NULL; 
   } 
   if(myid<3) 
   { 
	   down=myid+1; 
   } 
   else 
   { 
	   down=MPI_PROC_NULL; 
   } 
   for(n=0;n