Singleton

Singleton 模式文件

// .h//////////////////////////////////////////////////////////////////////////#pragma once#include <iostream>using namespace std;#define DECLEAR_SINGLE_INSTANCE(T)                             \private:static T m_SingletonInstance;                      \public:static T* Instance(){ return &m_SingletonInstance;}#define IMPLEMENT_SINGLE_INSTANCE(T)         \T T::m_SingletonInstance;class CSystemConfig{public:CSystemConfig(){}~CSystemConfig(){}public:DECLEAR_SINGLE_INSTANCE(CSystemConfig);public:void Initialize(){cout<<""<<endl;cout<<""<<endl;}};

测试文件

#include "Singleton.h"IMPLEMENT_SINGLE_INSTANCE(CSystemConfig) // 怎么解释这句话的功能呢?void main(){CSystemConfig::Instance()->Initialize();}