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31 lines
892 B
C
31 lines
892 B
C
#include <stdio.h>
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#include <mpi.h>
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int main(int argc, char **argv) {
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int a, b;
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int size, rank;
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int tag = 0;
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MPI_Status status;
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MPI_Request send_request, recv_request;
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MPI_Init(&argc, &argv);
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MPI_Comm_size(MPI_COMM_WORLD, &size);
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MPI_Comm_rank(MPI_COMM_WORLD, &rank);
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if (rank == 0) {
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a = 314159;
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MPI_Isend(&a, 1, MPI_INT, 1, tag, MPI_COMM_WORLD, &send_request);
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MPI_Irecv (&b, 1, MPI_INT, 1, tag, MPI_COMM_WORLD, &recv_request);
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MPI_Wait(&send_request, &status);
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MPI_Wait(&recv_request, &status);
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printf ("Process %d received value %d\n", rank, b);
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} else {
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a = 667;
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MPI_Isend (&a, 1, MPI_INT, 0, tag, MPI_COMM_WORLD, &send_request);
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MPI_Irecv (&b, 1, MPI_INT, 0, tag, MPI_COMM_WORLD, &recv_request);
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MPI_Wait(&send_request, &status);
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MPI_Wait(&recv_request, &status);
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printf ("Process %d received value %d\n", rank, b);
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}
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MPI_Finalize();
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return 0;
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}
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