我的单例模式(C++)

单例模式类文件 Single.h Single.cpp

//Single.h

#pragma once

#include <iostream>

using namespace std;

class SingleClass

{

private:

SingleClass();

public:

static SingleClass* GetInstance()

{

if (instance == NULL)

{

instance = new SingleClass();

}

return instance;

}

private:

static SingleClass *instance;

class GcWorker

{

~GcWorker();

};

static GcWorker worker;

//以上是单例模式，下面是方法和属性

public:

void PrintAdd(int a,int b);

void PrintSub(int a,int b);

};

//Single.cpp

#include "Single.h"

SingleClass* SingleClass::instance = NULL;

SingleClass::SingleClass()

{

//初始化及一些状态

}

void SingleClass::PrintAdd( int a,int b )

{

cout<<"a + b = "<<a+b<<endl;

}

void SingleClass::PrintSub( int a,int b )

{

cout<<"a - b = "<<a-b<<endl;

}

SingleClass::GcWorker::~GcWorker()

{

if (SingleClass::instance != NULL)

{

delete SingleClass::instance;

SingleClass::instance = NULL;

}

}

客户端调用测试：

#include "Single.h"

int main()

{

SingleClass::GetInstance()->PrintAdd(2,5);

SingleClass::GetInstance()->PrintSub(5,2);

cout<<endl<<"Over!"<<endl;

}

结果：

原文链接: https://www.cnblogs.com/sharpfeng/archive/2011/03/23/1992977.html

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