다른방식의 싱글톤

class Singleton{
public:
    static Singleton &getInstance();

private:
    Singleton();
    Singleton( const Singleton & ); // 복사생성자를 막는다.
};

Singleton &Singleton::getInstance()
{
    static Singleton selfInstance;
    return selfInstance;
}

출처 : http://digitz.tistory.com/247