#include <stdlib.h>
#include <stdio.h>

int **allocate_matrix(int rows, int cols)
{
    int **matrix = malloc(rows * sizeof(int *));//creation du tableau X hauteur
    if (!matrix)
        return NULL;
    for (int i = 0; i < rows; i++)
    {
        matrix[i] = malloc(cols * sizeof(int));//creation des colonnes
        //on free les cols si la matrice n'existe pas
        if (!matrix[i])
        {
            for (int j = 0; j < i; j++)
                free(matrix[j]);
            free(matrix);
            return NULL;
        }
    }
    return matrix;
}

void free_matrix(int **matrix, int rows)
{
    if (!matrix)
        return;
    //ajout
    for (int j = 0; j < rows; j ++)
        free(matrix[j]);
    free(matrix);
    return;
}

int main(void)
{
    int rows = 5;
    int cols = 5;
    int **matrix = allocate_matrix(rows, cols);
    if (!matrix)
    {
        return EXIT_FAILURE;
    }

    for (int i = 0; i < rows; i++)
    {
        for (int j = 0; j < cols; j++)
        {
            matrix[i][j] = i * cols + j;
        }
    }

    free_matrix(matrix, rows);
    //free(matrix);
    return EXIT_SUCCESS;
}