c++桥接模式_output is: fancy switch on 风扇打开 fancy switch off 风

要求：

Output is:

定义两个父类

class IElectricalEquipment {
public:
      virtual void PowerOn() = 0; //每种电器都能打开
      virtual void PowerOff() = 0; //每种电器都能关闭
      virtual ~IElectricalEquipment() { cout << "\nThis is Virtual ~IElectricalEquipment()"; };
};
class Switch {
public:
      IElectricalEquipment *Elec;
      virtual void On() = 0;
      virtual void Off() = 0;
      virtual ~Switch() { cout << "\nThis is Virtual ~Switch()"; }
};
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包含纯虚函数的类，称为抽象类。

实现

#include <iostream>
using namespace std;
class IElectricalEquipment {
public:
      virtual void PowerOn() = 0; //每种电器都能打开
      virtual void PowerOff() = 0; //每种电器都能关闭
      virtual ~IElectricalEquipment() { cout << "\nThis is Virtual ~IElectricalEquipment()"; };
};
class Switch {
public:
      IElectricalEquipment *Elec;
      virtual void On() = 0;
      virtual void Off() = 0;
      virtual ~Switch() { cout << "\nThis is Virtual ~Switch()"; }
};
class Fan: public IElectricalEquipment {
public:
      void PowerOn() {cout << "风扇打开" << endl;}
      void PowerOff() {cout << "风扇关闭" << endl;}
};
class Light : public IElectricalEquipment {
public:
      void PowerOn() { cout << "电灯打开" << endl;}
      void PowerOff() {cout << "电灯关闭" << endl;}
};
class FancySwitch: public Switch {
public:
      void On() {            cout << "Fancy Switch On" << endl; Elec->PowerOn();      }
      void Off() {           cout << "Fancy Switch Off" << endl; Elec->PowerOff();    }
};
class NormalSwitch: public Switch {
public:
      void On() {            cout << "Normal Switch On" << endl;  Elec->PowerOn();    }
      void Off() {           cout << "Normal Switch Off" << endl; Elec->PowerOff();     }
};
int main(int argc, char** argv) {
      //构造电器设备:风扇,开关
      IElectricalEquipment *fan = new Fan();
      IElectricalEquipment *light = new Light();
      //构造开关
      Switch * fancySwitch = new FancySwitch();
      Switch * normalSwitch = new NormalSwitch();
      //把风扇连接到时尚开关
      fancySwitch->Elec = fan;
      //开关连接到电器,那么当开关打开或关闭时电器应该打开/关闭
      fancySwitch->On();
      fancySwitch->Off();
      //把电灯连接到普通开关
      normalSwitch->Elec = light;
      normalSwitch->On(); //打开电灯
      normalSwitch->Off(); //关闭电灯
      //把电灯连接到时尚开关
      fancySwitch->Elec = light;
      fancySwitch->On();
      fancySwitch->Off();
      delete fan;
      delete light;
      delete fancySwitch;
      delete normalSwitch;
      return 0;
}
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