#include "stdafx.h"
#include <iostream>
using namespace std;


class Singleton 
{
public:
	static Singleton* Instance();
	static Singleton* ShowError();

private:
	static Singleton* _instance;
};


Singleton* Singleton::_instance = 0;

Singleton* Singleton::Instance () 
{
	if (_instance == 0) 
		_instance = new Singleton;
	return _instance;
}



int main() {
	
	Singleton *data1;
	Singleton *data2;
	data1->Instance();
	data2->Instance();

	cout<<endl<<endl;

}