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52 lines
1.0 KiB
52 lines
1.0 KiB
4 years ago
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#include <stdio.h>
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#include "mpi.h"
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main(int argc, char** argv)
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{
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int my_rank;
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int p, k;
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int root;
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int a1_local;
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int a2_local;
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int local_num;
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int endnum;
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int local_res;
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int final_res;
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int namelen;
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char proc_name[MPI_MAX_PROCESSOR_NAME];
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MPI_Init(&argc, &argv);
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MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
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MPI_Comm_size(MPI_COMM_WORLD, &p);
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MPI_Get_processor_name(proc_name, &namelen);
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if (my_rank == 0)
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{
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printf("Dose plithos arithmvn:\n");
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scanf("%d", &endnum);
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}
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root = 0;
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MPI_Bcast(&endnum, 1, MPI_INT, root, MPI_COMM_WORLD);
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local_res = 0;
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local_num = endnum/p;
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a1_local = (my_rank * local_num) + 1;
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a2_local = a1_local + local_num - 1;
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for (k=a1_local; k<=a2_local; k++)
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local_res = local_res + (k*k);
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printf("\n Process %d on %s : local result = %d \n", my_rank, proc_name, local_res);
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root = 0;
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MPI_Reduce(&local_res, &final_res, 1, MPI_INT, MPI_SUM, root, MPI_COMM_WORLD);
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if (my_rank == 0)
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{
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printf("\n Total result for N = %d is equal to : %d \n", endnum, final_res);
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}
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MPI_Finalize();
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}
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