MPI Lab2 Zad4

#include <iostream>
#include <mpi.h>
#include <string.h>
#include <ctime>
#include <time.h>

int main(int argc, char* argv[])
{
    int rank, brp, prenos, i;
    int sum = 0;
    int buff[10];
    int randbuff[320];

    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    MPI_Comm_size(MPI_COMM_WORLD, &brp);

    if (rank == brp - 1)
    {
        srand(time(NULL));

        for (i = 0; i < brp * 10; i++)
        {
            randbuff[i] = rand() % 1000;
        }

        for (i = 0; i < 10; i++)
            sum = sum + randbuff[i];

        if (sum % 2 == 0)
        {
            prenos = 1;

            MPI_Send(&prenos, 1, MPI_INT, brp - 2, 0, MPI_COMM_WORLD);
        }
        else
        {
            prenos = 0;

            MPI_Send(&prenos, 1, MPI_INT, brp - 2, 0, MPI_COMM_WORLD);
        }
    }

    MPI_Scatter(randbuff, 10, MPI_INT, buff, 10, MPI_INT, brp - 1, MPI_COMM_WORLD);

    if (rank != 0 && rank != brp - 1)
    {
        MPI_Recv(&prenos, 1, MPI_INT, rank + 1, 0, MPI_COMM_WORLD, MPI_STATUSES_IGNORE);

        prenos = prenos << 1;

        for (i = 0; i < 10; i++)
            sum = sum + buff[i];

        if (sum % 2 == 0)
        {
            prenos++;

            MPI_Send(&prenos, 1, MPI_INT, rank - 1, 0, MPI_COMM_WORLD);
        }
        else
        {
            MPI_Send(&prenos, 1, MPI_INT, rank - 1, 0, MPI_COMM_WORLD);
        }
    }

    if (rank == 0)
    {
        MPI_Recv(&prenos, 1, MPI_INT, rank + 1, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);

        for (int i = 1; i < brp; i++)
        {
            //std::cout << "Proces: " << i << " ima prenos: " << prenos <<"\n";
            if ((prenos >> 0) & 1)
                std::cout << "Proces: " << i << " ima parnu sumu bafera\n";
            prenos = prenos >> 1;
        }
    }

    MPI_Finalize();
}