C++中单例模式(Singleton)的简单实现

单例模式(Singleton)是设计模式中最为简单的模式之一,用于实现类的实例化.

以下代码将实现单例模式的简单功能,供大家交流学习,如有错误欢迎指正.



 1 #include <iostream>
 2 using std::cout;
 3 using std::endl;
 4 
 5 class Singleton
 6 {
 7     public:
 8         static Singleton * getInstance()
 9         {
10             if(NULL == _pInstance)
11             {
12                 _pInstance = new Singleton;
13             }
14             return _pInstance;
15         }
16 
17         static void destory()
18         {
19             if(_pInstance)
20             {
21                 delete _pInstance;
22             }
23         }
24 
25     private:
26         Singleton(){ cout << "Singleton()" << endl;}
27         ~Singleton(){ cout << "~Singleton()" << endl;}
28 
29     private:
30         static Singleton * _pInstance;
31 };
32 
33 Singleton * Singleton::_pInstance = NULL;

 测试用例因人而异,请自行测试.

posted @ 2017-06-16 23:48  m4ch0  阅读(286)  评论(0)  编辑  收藏  举报