{
        char x = 0xFF;//-1
        char y = 10;//10

        if ( x < y ) {
            cout << "x < y" << endl;
        }
    }

    {
        unsigned char x = 0xFF;//255
        unsigned char y = 10;//10

        if ( y < x ) {
            cout << "y < x" << endl;
        }
    }
    return 0;