C++的Singleton模式实现

Singleton.h



classA {

private:

staticA_instance;

protected:

A();

public:

staticAgetInstance();

voidsayhello();

};



Singleton.cpp



#include<iostream>

#include"singleton.h"

usingnamespacestd;



AA::_instance=0;



A::A() {}

AA::getInstance() {

if(_instance==0)

_instance=newA;

return_instance;

}

voidA::sayhello() {

cout<<"Hello!"<<endl;

}



testsingleton.cpp



#include"singleton.h"

#include<iostream>

usingnamespacestd;



intmain()

{

A*abc=A::getInstance();

abc->sayhello();

return0;

}原文链接: https://www.cnblogs.com/super119/archive/2011/04/05/2005624.html

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