实现一个图形类（Shape），包含受保护成员属性：周长、面积，

公共成员函数：特殊成员函数书写

定义一个圆形类（Circle），继承自图形类，包含私有属性：半径

公共成员函数：特殊成员函数、以及获取周长、获取面积函数

定义一个矩形类（Rect），继承自图形类，包含私有属性：长度、宽度

公共成员函数：特殊成员函数、以及获取周长、获取面积函数

在主函数中，分别实例化圆形类对象以及矩形类对象，并测试相关的成员函数。

#include <iostream>

using namespace std;
class Shape
{
protected:
    double round;
    double area;
public:
    Shape()
    {
        cout<<"无参构造"<<endl;
    }

    Shape(double r,double a):round(r),area(a)
    {
        cout<<"有参构造"<<endl;
    }

    ~Shape()
    {
        cout<<"析构函数"<<endl;
    }
    Shape(const Shape &other):round(other.round),area(other.area)
    {
        cout<<"拷贝构造"<<endl;
    }
    Shape & operator=(const Shape &other)
    {
        this->area=other.area;
        this->round=other.round;
        cout<<"拷贝赋值"<<endl;
        return *this;
    }
    Shape & operator=(Shape &&other)
    {
        this->area=other.area;
        this->round=other.round;
        cout<<"移动赋值"<<endl;
        return *this;
    }

};
class Circle:public Shape
{
private:
    double bj;
public:
    Circle() {}
    Circle(double r):bj(r)
    {
        cout<<"有参构造"<<endl;
    }

    ~Circle()
    {
        cout<<"析构函数"<<endl;
    }
    Circle(const Circle &other):Shape(other.round,other.area),bj(other.bj)
    {
        cout<<"拷贝构造"<<endl;
    }
    Circle & operator=(const Circle &other)
    {
        this->area=other.area;
        this->round=other.round;
        this->bj=other.bj;
        cout<<"拷贝赋值"<<endl;
        return *this;
    }
    Circle & operator=(Circle &&other)
    {
        this->area=other.area;
        this->round=other.round;
        this->bj=other.bj;
        cout<<"移动赋值"<<endl;
        return *this;
    }
    void zc()
    {
        this->round=this->bj*2*(3.14);
        cout<<"周长="<<round<<endl;
    }
    void mj()
    {
        this->area=this->bj*this->bj*(3.14);
        cout<<"面积="<<area<<endl;
    }
    void show()
    {
        cout<<"周长="<<round<<endl;
        cout<<"面积="<<area<<endl;
    }
};
class Rect:public Shape
{
private:
    double hight;
    double wight;
public:
    Rect() {}
    Rect(double h,double w):hight(h),wight(w)
    {
        cout<<"有参构造"<<endl;
    }

    ~Rect()
    {
        cout<<"析构函数"<<endl;
    }
    Rect(const Rect &other):Shape(other.round,other.area),hight(other.hight),wight(other.wight)
    {
        cout<<"拷贝构造"<<endl;
    }
    Rect & operator=(const Rect &other)
    {
        this->area=other.area;
        this->round=other.round;
        this->hight=other.hight;
        this->wight=other.wight;
        cout<<"拷贝赋值"<<endl;
        return *this;
    }
    Rect & operator=(Rect &&other)
    {
        this->area=other.area;
        this->round=other.round;
        this->hight=other.hight;
        this->wight=other.wight;
        cout<<"移动赋值"<<endl;
        return *this;
    }
    void zc()
    {
        this->round=(this->hight+this->wight)*2;
        cout<<"周长="<<round<<endl;
    }
    void mj()
    {
        this->area=this->hight*this->wight;
        cout<<"面积="<<area<<endl;
    }
    void show()
    {
        cout<<"周长="<<round<<endl;
        cout<<"面积="<<area<<endl;
    }
};
int main()
{
    Circle c1(10);
    c1.zc();
    c1.mj();
    Circle c2(c1);
    c2.show();
    Circle c3;
    c3=c1;
    c3.show();
    Circle c4;
    c4=move(c3);
    c3.show();
    c4.show();
    cout<<"******************************************"<<endl;
    Rect r1(10,5);
    r1.mj();
    r1.zc();
    Rect r2=r1;
    r2.show();
    Rect r3;
    r3=r1;
    r3.show();
    return 0;
}