/* Illustrates non-interference of collectives and point-to-point operations. * Program is erroneous since MPI_Recv cannot receive message from Bcast. */ #include double x; void main() { int argc; char **argv; int rank; x = 0; MPI_Init(&argc,&argv); MPI_Comm_rank(MPI_COMM_WORLD, &rank); if (rank==0) { MPI_Bcast(&x, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD); } else { MPI_Recv(&x, 1, MPI_DOUBLE, 0, MPI_ANY_TAG, MPI_COMM_WORLD, MPI_STATUS_IGNORE); } MPI_Finalize(); }