#include<iostream>
#define PI 3.14
using namespace std;
class Shape
{
public:
Shape(){cout<<"shape构造"<<endl;}
virtual double getArea()=0;
virtual double getPerim()=0;
~Shape(){cout<<"shape析构"<<endl;}
};
class Rectangle:public Shape
{
public:
Rectangle(double h,double w):height(h),weight(w){cout<<"rectangle 构造"<<endl;}
double getArea(){return height*weight;}
double getPerim(){return 2*(height+weight);}
~Rectangle(){cout<<"rectangle 析构"<<endl;}
private:
double height;
double weight;
};
class Circle:public Shape
{
public:
Circle(double r):radius(r){cout<<"Circle 构造"<<endl;}
double getArea(){return PI*radius*radius;}
double getPerim(){return 2*PI*radius;}
~Circle(){cout<<"Circle 析构"<<endl;}
private:
double radius;
};
int main()
{
Rectangle r(3.0,2.0);
cout<<"矩形面积为："<<r.getArea();
cout<<" 矩形周长为："<<r.getPerim()<<endl;
Circle c(4.0);
cout<<"圆的面积为："<<c.getArea();
cout<<" 圆的周长为："<<c.getPerim()<<endl;
return 0;
}