：单件模式：Singleton

#ifndef __SINGLETON_H__

#define __SINGLETON_H__

class Singleton

{

private:

	static Singleton* instance;

	Singleton(){}

public:

	static Singleton* getInstance()

	{

		if (instance == NULL)

		{

			instance = new Singleton();

		}

		return instance;

	}

	~Singleton(){}

};

Singleton* Singleton::instance = NULL;

#endif

#include <iostream>

#include "Singleton.h"

using namespace std;

int main()

{

	Singleton *p = Singleton::getInstance();

	return 0;

}