point.h

谭浩强 《C++ 程序设计》第三版的部分课后练习题源码

class Point:public Shape
{
      private:
              float x,y;
      public:
             Point(float a=0,float b=0):x(a),y(b){}
             void showname() const{ cout<<"the information of a point: ";}
             void display()const;
};