运算符重载

 先奉上代码：

#include <iostream.h>

class Point

{

public:

       int x,y;

       Point(){x=y=0;}

       Point(int i,int j){x=i;y=j;}

       Point(Point &);

       ~Point(){}

       void offset(int,int);          //提供对点的偏移

       void offset(Point &a);            //重载，偏移量用Point类对象表示

       bool operator ==(Point &a);      //运算符重载，判断两个对象是否相同

    bool operator !=(Point &a);      //运算符重载，判断两个对象是否不相同

       void operator +=(Point &a);      //运算符重载,将两个点对象相加

    void operator -=(Point &a);      //运算符重载,将两个点对象相减

       Point operator +(Point &a);      //运算符重载,相加并将结果放在左操作数中

    Point operator -(Point &a);      //运算符重载,相减并将结果放在左操作数中

    int getx(){return x;}

       int gety(){return y;}

       void display();

};

void Point::offset(int a,int b)

{

   x=x+a;

  y=y+b;

}

 

void Point::offset(Point &a)

{ x=x+a.x;

  y=y+a.y;

}

 

bool Point::operator==(Point &a)

{

       if( getx()==a.getx()&&gety()==a.gety())

              return true;

          else

                 return false;

}

 

bool Point::operator!=(Point &a)

{

       if( getx()==a.getx()&&gety()==a.gety())

              return false;

          else

                 return true;

}

 

 

void Point::operator +=(Point &a)

{

  x=x+a.x;

  y=y+a.y;

}

 

void Point::operator -=(Point &a)

{

  x=x-a.x;

  y=y-a.y;

}

 

Point Point::operator +(Point &a)

{

  x=x+a.x;

  y=y+a.y;

  return Point(x,y);

}

 

Point Point::operator -(Point &a)

{

 x=x-a.x;

  y=y-a.y;

  return Point(x,y);

}

 

 

void Point::display()

{ cout<<"("<<x<<","<<y<<")"<<endl;

}

 

 

 

 

int main()

{ Point a(3,6),b(7,9),c;

 cout<<"please input the x and y of point";

cin>>a.x>>a.y;

int m,n;

   m=a==b;

   if(m==1)

          cout<<"a==b";

     else

               cout<<"a!=b"<<endl;

        a.offset(5,6);

              a.display();

        a.offset(b);

              a.display();

        a+=b;

       a.display();

          a-=b;

       a.display();

          c=a+b;

        c.display();

          c=a-b;

        c.display();

   return 0;

}

 

 

 

最近学习了重载，写了个代码。不是很好，请大家批评指正。重载我感觉很好玩，以后有时间再写一下。睡觉去啦！！！！！！！！！！！！！！11