point.cpp

c++模板小实验

#include <iostream.h>
class point
{
	int x,y;
public:
	point(int vx,int vy)
	{
		x=vx;
		y=vy;
	}
	void print() { cout<<'('<<x<<','<<y<<')'<<endl;}
	point& operator++();
	point  operator++(int);
	friend point& operator--(point& m);
	point  operator--(int);
	point  operator=(point p)
	{
		x=p.x;
		y=p.y;
		return *this;// error C4716: 'point::operator=' : must return a value

	}

};

point& point:: operator++()
{
	x++;
	y++;
	return *this;
}

point point:: operator++(int)
{
	point temp=*this;
	x++;
	y++;
	return temp;
}

 point& operator--(point& m)
 { 
	m.x--;
	m.y--;
	return m;
}
point point::operator --(int)
{
	point temp=*this;
	x--;
	y--;
    return temp;
}
void main()
{
	point a (12,13);
	point b(32,34);
	a.print();
	(++a).print();
	++a=b;
	a.print();
	(a++).print();
	a++=b;
	a.print();
	--a;
	a.print();
	a--;
	a.print();	
	a=b;
	a.print();


}