cout << "It number = " << k << endl;
    for (int i = 0; i < n; i++)
        cout << "x[" << i << "] = " << P[k][i] << " " << endl;
    double sum;
    do
    {
        k++;
        for (int i = 0; i < n; i++)
        {
            P[k][i] = P[k - 1][i];
        }

        for (int i = 0; i < n; i++)
        {
            P[k][i] = 0;
            for (int j = 0; j < m; j++)
            {
                if (i == j)
                    P[k][i] += A1[i][j];
                else
                    P[k][i] += A1[i][j] * P[k][j];
            }
        }

        cout << "It number = " << k << endl;
        for (int i = 0; i < n; i++)
            cout << "x[" << i << "] = " << P[k][i] << " " << endl;

        sum = 0;
        for (int i = 0; i < n; i++)
        {
            sum += (P[k - 1][i] - P[k][i]) * (P[k - 1][i] - P[k][i]);
        }
    } while (pow(sum, 0.5) >= e);