http://blog.youkuaiyun.com/wuzhekai1985/article/details/6665869
//Singleton.h
class Singleton
{
public:
static Singleton* GetInstance();
private:
Singleton() {}
static Singleton *singleton;
};
//Singleton.cpp
Singleton* Singleton::singleton = NULL;
Singleton* Singleton::GetInstance()
{
if(singleton == NULL)
singleton = new Singleton();
return singleton;
}