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#include <stdio.h>
#include "mpi.h"
main(int argc, char** argv) {
int my_rank;
int p,k,res,finres,a1,b1,num;
int source;
int target;
int tag1 = 50;
int tag2 = 60;
int endnum;
MPI_Status status;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
MPI_Comm_size(MPI_COMM_WORLD, &p);
if (my_rank == 0) {
printf("Dose plithos aritmon:\n");
scanf("%d", &endnum);
for (target = 1; target < p; target++)
MPI_Send(&endnum, 1, MPI_INT, target, tag1, MPI_COMM_WORLD);
}
else
MPI_Recv(&endnum, 1, MPI_INT, 0, tag1, MPI_COMM_WORLD, &status);
res = 0;
num = endnum/p;
a1 = (my_rank * num) + 1;
b1 = a1 + num - 1;
for (k=a1; k<=b1; k++)
res = res + (k*k);
if (my_rank != 0) {
MPI_Send(&res, 1, MPI_INT, 0, tag2, MPI_COMM_WORLD);
}
else {
finres = res;
printf("\n Apotelesma of process %d: %d\n", my_rank, res);
for (source = 1; source < p; source++) {
MPI_Recv(&res, 1, MPI_INT, source, tag2, MPI_COMM_WORLD, &status);
finres = finres + res;
printf("\n Apotelesma of process %d: %d\n", source, res);
}
printf("\n\n\n Teliko Apotelesma: %d\n", finres);
}
MPI_Finalize();
}