---

设计一个不能被继承的类

class FinalClass1

{

public:

      static FinalClass1* GetInstance()

      {

            return new FinalClass1;

      }

      static void DeleteInstance( FinalClass1* pInstance)

      {

            delete pInstance;

            pInstance = 0;

      }

private:

      FinalClass1() {}

      ~FinalClass1() {}

};