/*张三可以开关家里的任何电器，比如电灯、电视、电扇等。 使用继承和多态来实现开关 电器的方法。*/

class ElectricAppliance {
public:
virtual void turnOn() = 0;
virtual void turnOff() = 0;
};

class Light : public ElectricAppliance {
public:
void turnOn() override {
// 开灯的操作
}
void turnOff() override {
// 关灯的操作
}
};

class TV : public ElectricAppliance {
public:
void turnOn() override {
// 开电视的操作
}
void turnOff() override {
// 关电视的操作
}
};

class Fan : public ElectricAppliance {
public:
void turnOn() override {
// 开电扇的操作
}
void turnOff() override {
// 关电扇的操作
}
};

int main() {
ElectricAppliance* appliances[3];
appliances[0] = new Light();
appliances[1] = new TV();
appliances[2] = new Fan();

for (int i = 0; i < 3; i++) {
appliances[i]->turnOn();
appliances[i]->turnOff();
}

for (int i = 2; i >= 0; i--) {
delete appliances[i];
}

return 0;
}