写出程序运行结果 #include [iostream.h] class Point { private: int x; int y; public: Point (int a,int b) { x=a; y=b; } virtual int area() {return 0;} }; class Rectangle:public Point { private: int length; int width; public: Rectangle(int a,int b,int l,int w): Point(a,b) { length=l; width=w; } virtual int area() { return length*width;} }; void disp(Point &p) { cout<<“面积是：”<

发布时间：2024-04-25 16:43:04