单例模式-c++实现

结合前辈们的博客，写下自己写的单例模式实现，暂时没有考虑多线程情况下

#include <iostream>
using namespace std;

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;

int main(int argc , char *argv [])
{
Singleton *singletonObj = Singleton ::GetInstance();
cout<<singletonObj->GetTest()<<endl;

return 0;
}