when I execute my program nothing appears, it must use a parallelism even for reading our text file !?

this is my code:

#include <stdio.h>

#include <stdlib.h>

#include "mpi.h"

#define MAX_LIGNE 40

#define MAX_COL 40

#define Matrice_adjacence "fichier22.txt"

#define Matrice_General "fichier111.txt"

typedef int Matrice[MAX_LIGNE][MAX_COL];

int main(int argc, char** argv)

{

int nbr_proc, rang_proc;

Matrice E;

int m1, n1;

FILE * aLire = fopen(Matrice_General, "r");

if (aLire == NULL)

{

printf("No file");

}

else

{

fscanf(aLire, "%d%d", &n1, &m1);

for (int i = 0; i < n1; i++) {

for (int j = 0; j < m1; j++)

fscanf(aLire, "%d", &E[i][j]);

fscanf(aLire, "\n");

}

fclose(aLire);

MPI_Init(&argc, &argv);

MPI_Comm_rank(MPI_COMM_WORLD, &rang_proc);

MPI_Comm_size(MPI_COMM_WORLD, &nbr_proc);

printf("Hi from proc %d ", rang_proc);

MPI_Barrier(MPI_COMM_WORLD);

MPI_Finalize();

}