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();
 }