int main()
{
    unsigned char tab[9] = {'1', ' ', 'G', 'g', '<', 't', 'z', '2', '3'};
    for (int i = 0; i < 9; i++)
        cout<<(int)tab[i]<<' ';
    cout<<endl;
    processBrightness(&tab[0], -100, 9);
    for (int i = 0; i < 9; i++)
        cout<<(int)tab[i]<<' ';
    cout<<endl;
    return 0;
}