int matr_multiply_matr(int m_width_0, int m_height_0, int m_width_1, int m_height_1)
{
    if (m_width_1 != m_height_0)
    {
        cout << endl << "ERROR!" << "number of colomns first matrix <> number of strings of second matrix" << endl;
        return 1;
    }

    int **f_matrix = new int*[m_width_0], **s_matrix = new int*[m_width_1], **res_matrix = new int*[m_width_0], i = 0, j = 0, l = 0;

    for (i = 0; i < m_height_0; i++)
        f_matrix[i] = new int[m_width_0];
    for (i = 0; i < m_height_1; i++)
        s_matrix[i] = new int[m_width_1];
    for (i = 0; i < m_height_1; i++)
        res_matrix[i] = new int[m_width_0];

    cout << "Enter members of first matrix ";
    for (i = 0; i < m_height_0; i++)
        for (j = 0; j < m_width_0; j++)
            cin >> f_matrix[i][j];
    cout << "Enter members of second matrix ";
    for (i = 0; i < m_height_1; i++)
        for (j = 0; j < m_width_1; j++)
            cin >> s_matrix[i][j];


    cout << endl << endl;
    for (i = 0; i < m_height_0; i++)
        {
            for (j = 0; j < m_width_0; j++)
                cout << "|" << f_matrix[i][j] << "| ";
            cout << endl;
        }
    cout << endl << " x" << endl << endl;
    for (i = 0; i < m_height_1; i++)
            {
                for (j = 0; j < m_width_1; j++)
                    cout << "|" << s_matrix[i][j] << "| ";
                cout << endl;
            }

        for (i = 0; i < m_height_1; i++)
            for (j = 0; j < m_width_0; j++)
                res_matrix[i][j] = 0;

        for (i = 0; i < m_height_0; i++)
            for (l = 0; l < m_height_1; l++)
                for (j = 0; j < m_width_0; j++)
                    res_matrix[i][l] += f_matrix[i][j] * s_matrix[j][l];

        cout << endl << "Result" << endl;
    for (i = 0; i < m_height_0; i++)
            {
                for (j = 0; j < m_width_1; j++)
                    cout << "|" << res_matrix[i][j] << "| ";
                cout << endl;
            }
    system("pause");
    return 0;
};