八、外观模式

外观模式（Facade）为子系统中的一组接口提供一个一致的界面，此模式定义了一个高层接口，这个接口使得这一子系统更加容易使用。

//Facade.h#ifndef _FACADE_H#define _FACADE_Hclass SubSystemOne{public:void Operation();};class SubSystemTwo{public:void Operation();};class Facade{public:Facade();~Facade();void OperationWapper();SubSystemOne* _sub1;SubSystemTwo* _sub2;};#endif

//Facade.cpp#include "Facade.h"#include <iostream>using namespace std;void SubSystemOne::Operation(){cout<<"operation of subsystem one..."<<endl;}void SubSystemTwo::Operation(){cout<<"operation of subsystem two..."<<endl;}Facade::Facade(){_sub1 = new SubSystemOne();_sub2 = new SubSystemTwo();}Facade::~Facade(){delete _sub1;delete _sub2;}void Facade::OperationWapper(){_sub1->Operation();_sub2->Operation();}

//main.cpp#include "Facade.h"int main(){Facade * fa = new Facade();fa->OperationWapper();return 0;}