class square_t {
    private:
        bool m_bColour;

    public:
        square_t(bool _bColour) {
            m_bColour = _bColour;
        }
};

class square_t {
    private:
        bool m_bColour;

    public:
        square_t(bool _bColour) : m_bColour(_bColour) { }
}