Headfirst设计模式的C++实现——外观模式(Facade)

light.h

 #ifndef _LIGHT_H_

 #define _LIGHT_H_

 #include <iostream>

 class LIGHT {

 public:

     void dim(int level) { std::cout << "LIGHT dim to " << level << std::endl; }

 };

 #endif

popper.h

 #ifndef _POPPER_H_

 #define _POPPER_H_

 #include <iostream>

 class POPPER {

 public:

     void on() { std::cout << "POPPER on" << std::endl; }

     void pop() { std::cout << "POPPER pop" << std::endl; }

 };

 #endif

facade.h

 #ifndef _FACADE_H_

 #define _FACADE_H_

 #include "light.h"

 #include "popper.h"

 class FACADE {

 private:

     POPPER & popper;

     LIGHT & light;

 public:

     FACADE(POPPER &_popper, LIGHT &_light) : popper(_popper), light(_light) {}

     void watch_movie() {

         popper.on();

         popper.pop();

         light.dim();

     }

 };

 #endif

main.cpp

 #include "facade.h"

 int main()

 {

     LIGHT light;

     POPPER popper;

     FACADE facade(popper, light);

     facade.watch_movie();

 }