继承和派生

class Point //基类Point类的声明 {public: //公有函数成员 void InitP(float xx=0, float yy=0) {X=xx;Y=yy;} void Move(float xOff, float yOff) {X+=xOff;Y+=yOff;} float GetX() {return X;} float GetY() {return Y;} private: float X,Y; };