CODE:

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

protected:
   Singleton();

private:
   static Singleton* _Instance;
}




Singleton  Singleton::Instance()
{
   if(_Instance == 0)
      _Instance = new Singleton;

   return _Instance;
}

CODE:

class Singleton
{
public:
	static Singleton* Instance();
	
protected:
	Singleton(){}
	Singleton( const Singleton& );
	Singleton& operator=( const Singleton& );
};

Singleton* Singleton::Instance()
{
	static Singleton _Instance;	//一度しか生成されない
	return &_Instance;
}