adt.cpp

来自「《24学时精通c++》的光盘内容」· C++ 代码 · 共 11 行

 class Shape
 {
 public:
      Shape(){}
      virtual ~Shape(){}
      virtual long GetArea() = 0; 
      virtual long GetPerim()= 0;
      virtual void Draw() = 0;
 private:
};