c++ - Trying to fill a 2 dimensional array with random numbers using a function

I'm trying to fill an array with random numbers using pointers. Here's my code so far:

#include 

#include 
#include 
#include 
using namespace std;

const int mRows = 3;
const int mCols = 5;

void fillMatrix(int ** m_ptr_ptr, int, int);


int main()
{
    unsigned seed;
    seed = time(0);
    srand(47);

    int matrix[mRows][mCols];
    int* matrix_ptr[mRows];
    int** matrix_ptr_ptr = &matrix_ptr[0];



    for (int i = 0; i < mRows; i++)
    {
        matrix_ptr[i] = &matrix[i][0];
    }


    fillMatrix(matrix_ptr_ptr, mRows, mCols);

    cout << endl << endl;


    for (int j = 0; j < mRows; j++)
    {
        for (int k = 0; k < mCols; k++)
        {
            cout << setw(9) << *((*matrix_ptr_ptr + j) + k) << setw(6);
        }
            cout << endl << endl;
    }
}


void fillMatrix(int **matrix_ptr_ptr, int N, int P)
{
    for (int j = 0; j < N; j++)
    {
        cout << left;
        for (int k = 0; k < P; k++)
        {
            *((*matrix_ptr_ptr + j) + k) = rand() % 25;
            cout << setw(9) << *((*matrix_ptr_ptr + j) + k) << setw(6);

        }

        cout << endl << endl;
    }
}

When I print the matrix using the fillMatrix function I get the following

17 24 11 0 20


13 3  0 13 22

20 21 11 19 18

After printing out the matrix_ptr_ptr in main by using the for loop in main I get:

17 13 20 21 11


13 20 21 11 19

20 21 11 19 18

How can I get matrix_ptr_ptr in main to equal the matrix outputted by the fillMatrix function? Any help would be appreciated