基类中的成员函数包装

#include <iostream>

// 基类
class Animal {
public:
    virtual void makeSound() {
        std::cout << "Animal makes a sound" << std::endl;
    }
};

// 子类1：简单包装
class Dog : public Animal {
public:
    void makeSound() override {
        Animal::makeSound(); // 调用基类的成员函数
        std::cout << "Dog barks" << std::endl;
    }
};

// 子类2：增强包装
class Cat : public Animal {
public:
    void makeSound() override {
        std::cout << "Cat starts to purr..." << std::endl;
        Animal::makeSound(); // 调用基类的成员函数
        std::cout << "Cat stops purring." << std::endl;
    }
};

// 子类3：完全重写
class Duck : public Animal {
public:
    void makeSound() override {
        std::cout << "Duck quacks" << std::endl;
    }
};

int main() {
    Animal* animals[3];
    animals[0] = new Dog();
    animals[1] = new Cat();
    animals[2] = new Duck();

    for (int i = 0; i < 3; ++i) {
        animals[i]->makeSound();
        delete animals[i];
    }

    return 0;
}