mpi run command error : process excited without calling finalize - c

Question

I'm making an MPI program with Visual studio and a problem occurred.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <mpi.h>
int main(void) {
int a[1000], b[1000];
int my_rank, p;
int source = 0, tag = 5;
int count[100], result = 0;
MPI_Status status;
MPI_Init(NULL, NULL);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
MPI_Comm_size(MPI_COMM_WORLD, &p);
srand(time(NULL));
if (my_rank == 0) {
for (int j = 0; j < p; j++) {
for (int i = j / p; i < 1000 * ((j+1) / p); i++) {
a[i] = rand() % 100;
MPI_Send(a[i], 1, MPI_INT, j, tag, MPI_COMM_WORLD);
}
}
printf("&d", a[30]);
for (int i = 0; i < 1000 / p; i++) {
MPI_Recv(&b[i], 1, MPI_INT, source, tag, MPI_COMM_WORLD, &status);
if (b[i] % 2 != 0) {
count[my_rank] += b[i];
}
}
}
else if (my_rank != 0) {
count[my_rank] = 0;
for (int j = 0; j < 1000 / p; j++) {
MPI_Recv(&b[j], 1, MPI_INT, source, tag, MPI_COMM_WORLD, &status);
if (b[j] % 2 != 0) {
count[my_rank] += b[j];
}
}
}
for (int i = 0; i < p; i++) {
result += count[i];
}
printf("The sum of the odd numbers is %d.", result);
MPI_Finalize();
return 0;
}
If I run the code above (I inserted mpiexec -n 4 HW1.exe at the command prompt), I get an error message like this :
0: samsungpc: 0xc0000005: process excited without calling finalize
1: samsungpc: terminated
2: samsungpc: terminated
3: samsungpc: terminated
---error analysis---
0: HW1.exe ended prematurely and may have crashed on samsungpc
---error analysis---