#include<iostream>
using namespace std;
class Rectangle 
{
private:
    double length;
    double width;
public:
    Rectangle(double l, double w)
    {
        this->length = l;
        this->width = w;
    }
    Rectangle(Rectangle & r)
    {
        cout << "拷贝构造函数：";
        length = r.length;
        width = r.width;
    }
    ~Rectangle() 
    {
        cout << "析构函数" << "\n";
    }
    void get();
    void input();
    double RArea();
    double RCircumference();
};
void Rectangle::input()
{
    double l, w;
    cout << "请分别输入矩形的长和宽：";
    cin >> l >> w;
    length = l;
    width = w;
}
void Rectangle::get()
{
    cout << "长为" << length << "\t宽为" << width << "的矩形\n";
}
double Rectangle::RArea()
{
    double area = 0;
    area = length * width;
    return area;
}
double Rectangle::RCircumference()
{
    double Circumference = 0;
    Circumference = 2 * (length + width);
    return Circumference;
}
void main()
{
    Rectangle r1(6.7, 8.6);
    Rectangle r2(12.13,13.14);
    r1.get();
    cout << "面积为：" << r1.RArea() << "\n";
    cout << "周长为：" << r1.RCircumference() << "\n";
    r2.input();
    r2.get();
    cout << "面积为：" << r2.RArea() << "\n";
    cout << "周长为：" << r2.RCircumference() << "\n";
    system("pause");
}