MPI program in C to find sum of an array of 8 elements using 3-d cube topology

Cube_ArraySum.c

#include<stdio.h>
#include<mpi.h>

int main(int argc, char **argv)
{
	int rank=0, n, src, dest;
	MPI_Init(&argc, &argv);
	MPI_Status status;
	MPI_Comm_rank(MPI_COMM_WORLD, &rank);
	MPI_Comm_size(MPI_COMM_WORLD, &n);
	int tag = 100;
	int receive;
	int array[8] = {10, 20, 30, 40, 50, 60, 70, 80};
	
	if (rank&1)
		MPI_Send(&array[rank], 1, MPI_INT, rank-1, tag, MPI_COMM_WORLD);
	else
	{
		MPI_Recv(&receive, 1, MPI_INT, rank+1, tag, MPI_COMM_WORLD, &status);
		array[rank] += receive;
		if (rank&2)
			MPI_Send(&array[rank], 1, MPI_INT, rank-2, tag, MPI_COMM_WORLD);
		else
		{
			MPI_Recv(&receive, 1, MPI_INT, rank+2, tag, MPI_COMM_WORLD, &status);
			array[rank] += receive;
			if (rank&4)
				MPI_Send(&array[rank], 1, MPI_INT, rank-4, tag, MPI_COMM_WORLD);
			else
			{
				MPI_Recv(&receive, 1, MPI_INT, rank+4, tag, MPI_COMM_WORLD, &status);
				array[rank] += receive;
				printf("\n%d \n", array[0]);
			}
		}
	}
	
	MPI_Finalize();
	return 0;
}