#include "stdafx.h"

class MyInterval
{
public:
	MyInterval(int x, int y)
	{	}

	int Subtract()
	{
		return 0;
	}
};

class MyThing
{
public:
	MyThing(int x):m_x(x)
	{}

	MyInterval operator- (const MyThing& x) const
	{
		return MyInterval(this->m_x, x.m_x);
	}
private:
	int m_x;
};

int _tmain(int argc, _TCHAR* argv[])
{
	MyThing thing1(5);
	MyThing thing2(6);

	int x = (thing2 - thing1).Subtract();
}