#include #include #include int main(int argc, char** argv) { int size, rank; MPI_Init(NULL, NULL); MPI_Comm_size(MPI_COMM_WORLD, &size); MPI_Comm_rank(MPI_COMM_WORLD, &rank); if(size != 3) { if(rank == 0) { printf("This program needs to run on exactly 3 processes "); } } else { if(rank ==0){ int parcel; MPI_Recv(&parcel, 1, MPI_INT, 1, 1, MPI_COMM_WORLD, MPI_STATUS_IGNORE); printf("Received %d from process %d ", x, 1); int number = rank + 1; MPI_send(&parcel, 1, MPI_INT, 2, 2, MPI_COMM_WORLD, MPI_STATUS_IGNORE); printf("Received %d from process %d ", y, 2); } else { if(rank == 1){ usleep(5000000); } } MPI_Finalize(); return 0; }

could you fix my code please I want to write a "Pass-the-parcel" MPI program that will run with 3 or more nodes, such that process rank 0 will send an integer variable call "parcel" initialised with 1, to Process rank 1 which will add 1 to the parcel and then send it to process rank 2, and so on until the highest rank process will send it back to Process rank 0, at which point the parcel variable should contain the value of the number of nodes there are above is my code but it doesn't run correctly.