class Singleton
{
public:
    static Singleton *GetInstance()
    {
        return m_Instance;
    }
 
    int GetTest()
    {
        return m_Test;
    }
 
private:
    Singleton(){ m_Test = 10; }
    static Singleton *m_Instance;
    int m_Test;
 
    // This is important
    class GC
    {
    public :
        ~GC()
        {
            // We can destory all the resouce here, eg:db connector, file handle and so on
            if (m_Instance != NULL )
            {
                cout<< "Here is the test" <<endl;
                delete m_Instance;
                m_Instance = NULL ;
            }
        }
    };
    static GC gc;
};
 
Singleton *Singleton ::m_Instance = new Singleton();
Singleton ::GC Singleton ::gc;//此时在类外部用gc不应该是Singleton ::gc？为什么要加GC Singleton

Singleton::gc 是变量名？
gc不应该才是变量名嘛？

能不能这样理解：
Singleton ::GC/*变量类型*/ Singleton/*作用域*/ ::gc;

好的谢谢。。您有没有详细介绍这方面的资料呢？

嗯好的 c++编程思想里面有这部分没

我有pdf版的。刚找了没找到在哪个部分。。

恩好的谢了