对象3：继承

#include <iostream>
#include <string>
using namespace std;

class Animal
{
public:
    string mouth;
    void eat();
    void sleep();
    void drool();
};

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

class Turtle : public Animal
{
public:
    void swim();
};

void Animal::eat()
{
    cout << "I am eating " << endl;
}

void Animal::sleep()
{
    cout << "I am sleeping , don't disturb me " << endl;
}

void Animal::drool()
{
    cout << " i am female , when i look male , i will flow water" << endl;
}


void Pig::climb()
{
    cout << " 我是一个漂亮的母猪， 我会上树， 我正在上树" << endl;
}

void Turtle::swim()
{
    cout << "我是一只小甲鱼，当母猪要来抓我的时候，我就游到海里。。 哈哈" << endl;
}


int main()
{
    Pig pig;
    Turtle turtle;

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

    return 0;
}