外观模式

#include <iostream>
using namespace std;

/*
  为一组子类提供一个高层一致接口，使得这一组子列更加容易被使用
  1、设计之初有意识将不同的层次分离，定义合适的外观接口
  2、增加外观可以接口，减少依赖
  3、维护遗留大型系统
*/

class SubOne {
public:
    void Method() {
        cout<<"1"<<endl;
    }
};

class SubTwo {
public:
    void Method() {
        cout<<"2"<<endl;
    }
};

class SubThree {
public:
    void Method() {
        cout<<"3"<<endl;
    }
};

class Facade {
public:
    Facade() {
        one = new SubOne();
        two = new SubTwo();
        three = new SubThree();
    }

    void MethodA()
    {
        one->Method();
        two->Method();
        three->Method();
    }

    void MethodB()
    {
        three->Method();
        one->Method();
    }

private:
    SubOne* one;
    SubTwo* two;
    SubThree* three;
};

int main()
{
    Facade* pFacade = new Facade();
    pFacade->MethodA();
    pFacade->MethodB();

    return 0;
}

转载于:https://www.cnblogs.com/yanjiu/archive/2012/08/08/2628438.html