一、外观模式中的角色与职责
Facade(外观角色)：为调用方, 定义简单的调用接口SubSystem(子系统角色)：功能提供者。指提供功能的类群（模块或子系统）
二、适用场景
(1) 复杂系统需要简单入口使用 (2) 客户端程序与多个子系统之间存在很大的依赖性
三、示例代码
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;
//电视机
class Television{
public:
void On(){
cout << "电视机打开..." << endl;
}
void Off(){
cout << "电视机关闭..." << endl;
}
};
//灯
class Light{
public:
void On(){
cout << "灯打开..." << endl;
}
void Off(){
cout << "灯关闭..." << endl;
}
};
//音箱
class Audio{
public:
void On(){
cout << "音响打开..." << endl;
}
void Off(){
cout << "音响关闭..." << endl;
}
};
//麦克风
class Mircophone{
public:
void On(){
cout << "麦克风打开..." << endl;
}
void Off(){
cout << "麦克风关闭..." << endl;
}
};
//DVD播放器
class DVDPlayer{
public:
void On(){
cout << "DVD播放器打开..." << endl;
}
void Off(){
cout << "DVD播放器关闭..." << endl;
}
};
//游戏机
class Gamemachine{
public:
void On(){
cout << "游戏机打开..." << endl;
}
void Off(){
cout << "游戏机关闭..." << endl;
}
};
class KTVMode{
public:
KTVMode(){
pTv = new Television;
pLight = new Light;
pAudio = new Audio;
pMicrophone = new Mircophone;
pDvd = new DVDPlayer;
}
void OnKTV(){
pTv->On();
pLight->Off();
pAudio->On();
pMicrophone->On();
pDvd->On();
}
void OffKTV(){
pTv->Off();
pLight->On();
pAudio->Off();
pMicrophone->Off();
pDvd->Off();
}
~KTVMode(){
delete pTv;
delete pLight;
delete pAudio;
delete pMicrophone;
delete pDvd;
}
public:
Television* pTv;
Light* pLight;
Audio* pAudio;
Mircophone* pMicrophone;
DVDPlayer* pDvd;
};
void test(void){
KTVMode* ktv = new KTVMode;
ktv->OnKTV();
}
int main(void)
{
test();
system("pause");
return 0;
}
