#include <iostream>
using namespace std;
class Point
{
int _x, _y;
public:
Point(int x=0, int y=0) : _x(x), _y(y) {}
Point& operator++();
Point operator++(int);
Point& operator--();
Point operator--(int);
friend ostream& operator << (ostream& o, Point& p);
};
Point& Point::operator++()
{
_x++;
_y++;
return *this;
}
Point Point::operator++(int)
{
Point temp = *this;
++*this;
return temp;
}
Point& Point::operator--()
{
_x--;
_y--;
return *this;
}
Point Point::operator--(int)
{
Point temp = *this;
--*this;
return temp;
}
ostream& operator << (ostream& o, Point& p) {
o << '(' << p._x << ", " << p._y << ')';
return o;
}
int main()
{
Point p(1, 2);
cout << p << endl;
cout << p++ << endl;
cout << ++p << endl;
cout << p-- << endl;
cout << --p << endl;
return 0;
}
