can代码
class CPoint{
private: //私有成员
float m_x, m_y;
protected: //保护成员
void SetPoint(float x, float y) {m_x = x; m_y = y;}
public: //公共成员
CPoint(float x, float y) {m_x = x; m_y = y;} //构造函数
void Move(float x, float y) {SetPoint(m_x + x, m_y + y);}
void Display() {cout<<m_x<<" "<<m_y<<endl;}
~CPoint(); //析构函数