第十三节 测试

#include<iostream>
using namespace std;

class Shape
{
public:
    Shape(){}
    virtual ~Shape(){}
    virtual void print()const =0;//打印
};      
class Point
{
public:
    int x;
    int y;
    Point(int _x,int _y):x(_x),y(_y)
    {}
};
class Rectangle:public Shape
{
    int width;
    int height;
    Point* leftUp;
public:
    Rectangle(int _width,int _height,int _x,int _y);//构造
    Rectangle(const Rectangle& other);//拷贝构造
    Rectangle& operator=(const Rectangle& other);//重载'='
    ~Rectangle();//析构

    void print()const;
};
inline 
Rectangle::Rectangle(int _width,int _height,int _x,int _y):width(_width),height(_height),leftUp(new Point(_x,_y))
{
}
inline void 
Rectangle::print() const
{
    cout<<"width:"<<width<<",height:"<<height<<",Point("<<leftUp->x<<","<<leftUp->y<<")"<<endl;
}
inline 
Rectangle::Rectangle(const Rectangle& other)
{
    width=other.width;
    height=other.height;
    if(other.leftUp!=NULL)
        leftUp=new Point(other.leftUp->x,other.leftUp->y);
    else
    {
        delete leftUp;
        leftUp=NULL;
    }
}
inline Rectangle&
Rectangle::operator = (const Rectangle& other)
{
    if (this == &other)
    {
        return *this;
    }
   // delete leftUp;
    width = other.width;
    height = other.height;
    if(leftUp==NULL)//我空
    {
        //我空它空省略
        if(other.leftUp!=NULL)//我空它不空
        {
             leftUp = new Point(other.leftUp->x, other.leftUp->y);
        }
    }
    else//我不空
    {
        if(other.leftUp==NULL)//我不空它空
        {
            delete leftUp;
            leftUp=NULL;
        }
        else//我不空它不空
        {
            leftUp=new Point(*(other.leftUp));
        }
    }
    return *this;
}
inline 
Rectangle::~Rectangle()
{
    delete leftUp;
}
int main()
{
    Rectangle a(1,1,2,2);//构造
    Rectangle b(a);//拷贝构造
    Rectangle c(3,3,4,4);
    Rectangle d(0,0,0,0);
    d=c;//重载'='
    a.print();//打印
    b.print();
    c.print();
    d.print();
    return 0;
}

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