設計模式——外觀模式（C++）

/*****************************************
Copyright (c) 2016 Jingshuang Hu

@filename:System.h
@datetime:2016.09.15
@author:HJS
@e-mail:[email protected]
@blog:http://blog.csdn.net/hujingshuang
*****************************************/
#ifndef _SYSTEM_H
#define _SYSTEM_H

class subSystemA {
public:
    void fun();
};

class subSystemB {
public:
    void fun();
};

class subSystemC {
public:
    void fun();
};

class subSystemD {
public:
    void fun();
};

#endif // _SYSTEM_H

/*****************************************
Copyright (c) 2016 Jingshuang Hu

@filename:System.cpp
@datetime:2016.09.15
@author:HJS
@e-mail:[email protected]
@blog:http://blog.csdn.net/hujingshuang
*****************************************/
#include "System.h"
#include <iostream>

using namespace std;

void subSystemA::fun() {
    cout << "system A" << endl;
}

void subSystemB::fun() {
    cout << "system B" << endl;
}

void subSystemC::fun() {
    cout << "system C" << endl;
}

void subSystemD::fun() {
    cout << "system D" << endl;
}

/*****************************************
Copyright (c) 2016 Jingshuang Hu

@filename:Facade.h
@datetime:2016.09.15
@author:HJS
@e-mail:[email protected]
@blog:http://blog.csdn.net/hujingshuang
*****************************************/
#ifndef _FACADE_H
#define _FACADE_H

class Facade {
public:
    void fun();
};

#endif // _FACADE_H

/*****************************************
Copyright (c) 2016 Jingshuang Hu

@filename:Facade.cpp
@datetime:2016.09.15
@author:HJS
@e-mail:[email protected]
@blog:http://blog.csdn.net/hujingshuang
*****************************************/
#include "Facade.h"
#include "System.h"

class System;

void Facade::fun() {
    subSystemA *system1 = new subSystemA();
    subSystemB *system2 = new subSystemB();
    subSystemC *system3 = new subSystemC();
    subSystemD *system4 = new subSystemD();

    system1->fun();
    system2->fun();
    system3->fun();
    system4->fun();
}

/*****************************************
Copyright (c) 2016 Jingshuang Hu

@filename:main.cpp
@datetime:2016.09.15
@author:HJS
@e-mail:[email protected]
@blog:http://blog.csdn.net/hujingshuang
*****************************************/
#include <iostream>

#include "Facade.h"
#include "System.h"

using namespace std;

int main() {
    Facade* facade = new Facade();
    facade->fun();

    system("pause");
    return 0;
}