设计模式-Facade(结构型模式) 针对 最终类的实现通过一系列类的相关操作，重点关注 起始与结尾的操作。

以下代码来源： 设计模式精解－GoF 23种设计模式解析附C++实现源码

//Facade.h

#pragma once
class Subsystem1
{
public:
    Subsystem1();
    virtual ~Subsystem1();
    void Operation();
protected:
private:
};

class Subsystem2
{
public:
    Subsystem2();
    virtual ~Subsystem2();
    void Operation();
};

class Facade {
public:
    Facade();
    virtual ~Facade();
    void OperationWrapper();
protected:
private:
    Subsystem1* _s1;
    Subsystem2* _s2;
};

//Facade.cpp

#include"Facade.h"
#include<iostream>
Subsystem1::Subsystem1(){}
Subsystem1::~Subsystem1(){}
void Subsystem1::Operation()
{
    std::cout << "Subsystem Operation I" << std::endl;
}

Subsystem2::Subsystem2(){}
Subsystem2::~Subsystem2(){}
void Subsystem2::Operation()
{
    std::cout << "Subsystem Operation II" << std::endl;
}
Facade::Facade()
{
    this->_s1 = new Subsystem1();
    this->_s2 = new Subsystem2();
}
Facade::~Facade()
{
    delete _s1;
    delete _s2;
}
void Facade::OperationWrapper()
{
    this->_s1->Operation();
    this->_s2->Operation();
}

//main.cpp

#include"Facade.h"

int main(int args, char* argv)
{
    Facade* fac = new Facade();
    fac->OperationWrapper();
    return ;
}