類的繼承: 當使用class Pig:public Animal{} 就可以繼承Animal裡面的屬性，

類的函式改寫: 對於繼承父類的屬性，可以在子類裡面重新被定義和改寫

#include <iostream>

class Animal{
public:
    std::string mouth;

    Animal();
    ~Animal();
    void eat();
    void sleep();
    void drool();
};

Animal::Animal() {
    std::cout << "請開始你的表演" << std::endl;
}

Animal::
 
~Animal() {
    std::cout << "遊戲結束" << std::endl;
}

void Animal::eat() {
    std::cout << "正在吃飯" << std::endl;
}

void Animal::sleep() {
    std::cout << "我正在吃飯" << std::endl;
}

void Animal::drool() {
    std::cout << "我正在流口水" << std::endl;
}


class
 
 Pig : public Animal {
public:
    void eat();
    void climb();
};

void Pig::climb() {
    std::cout << "我是豬我會爬樹" << std::endl;
}

void Pig::eat() {
    std::cout << "豬正在吃飯" << std::endl;
}

class Turble : public Animal {
public:
    void eat();
    void swim();
};

void Turble::swim() {
    std::cout 
 
<< "小烏龜正在游泳" << std::endl;
}
void Turble::eat() {
    std::cout << "小烏龜正在吃飯" << std::endl;
}
int main() {

    Turble turble;
    Pig pig;

    turble.eat();
    turble.swim();
    pig.eat();
    pig.climb();


}