Deplasarea la dreapta & stanga sub diagonala principala

int A[10][10], n, m, k, aux;

void afisare() {
    cout << endl;

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
            cout << A[i][j] << " ";
        cout << endl;
    }
    cout << endl;
}

int main()
{
    cout << "k: "; cin >> k;
    cout << "n: "; cin >> n;

    /* initialize random seed: */
    srand(time(NULL));

    /* generate secret number between 1 and 10: */
    int nrGeneratRandom;

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            nrGeneratRandom = rand() % 7 + 1;
            A[i][j] = nrGeneratRandom; //Introducere date in matrice
        }
    }

    afisare();


 /*Deplasarea cu o pozitie spre dreapta*/

    aux = A[k][k - 1];

    for (int j = k - 2; j >= 1; j--)
        A[k][j + 1] = A[k][j];

    A[k][1] = aux;



/* Deplasarea cu o pozitie spre stanga
   sub diagonala principala!           */

    aux = A[k][1];

    for (int j = 1; j <= k - 2; j++)
        A[k][j] = A[k][j + 1];

    A[k][k - 1] = aux;


    afisare();

    cout << endl;

    return 0;
}