drdrdrdr

const int N = 3;
    int a[N][N], b[N][N], c[N][N], s;

    for (int i = 0; i<N; i++)
    {
        for (int j = 0; j<N; j++)
        {
            a[i][j] = rand() % 10;
            cout << a[i][j] << '\t';
        }
        cout << endl;
    }

    cout << endl;

    for (int i = 0; i<N; i++)
    {
        for (int j = 0; j<N; j++)
        {
            b[i][j] = rand() % 10;
            cout << b[i][j] << '\t';
        }
        cout << endl;
    }

    cout << endl;

    for (int i = 0; i<N; i++)
    {
        for (int l = 0; l<N; l++)
        {
            s = 0;
            for (int j = 0; j<N; j++)
            {
                s += a[i][j] * b[j][l];
            }
            c[i][l] = s;
            cout << c[i][l] << '\t';
        }
        cout << endl;
    }