當基類建構函式中需要傳入引數進行構造時，定義子類建構函式時，構造相同名字的基類建構函式，對於基類也可以傳入自身的引數

#include <iostream>

using namespace std;

class Animal{
public:
    void eat();
    void sleep();
    void drool();
    Animal(string TheName);//子類的輸入引數 
    string name;
};

Animal::Animal(string TheName) {
    name = TheName;
}

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

void Animal::sleep() {
    cout << "正在睡" << endl;
}

void Animal::drool() {
    cout << "正在留口水" << endl;
}

class Pig:public Animal{
public:
    Pig(string TheName, string TheSex); //TheName表示與父類相同的引數,TheSex表示子類獨有的引數 
    string
 
 sex;
    void climb();
};

class Turbol:public Animal{
public:
    Turbol(string TheName, string TheSex);
    string sex;
    void swim();
};

Pig::Pig(string TheName, string TheSex) : Animal(TheName){ //TheName表示與父類相同的輸入引數, TheSex表示子類獨有的輸入引數
    sex = TheSex;
}

Turbol::Turbol(string TheName, string
 
 TheSex) : Animal(TheName){
    sex = TheSex;
}


int main() {
    Pig pig("小豬豬", "女");
    Turbol turtle("小甲魚", "男");
    cout << "世上每一隻豬都叫" << pig.name << " 性別是" << pig.sex << endl;
    cout << "世上每一隻烏龜都叫" << turtle.name << " 性別是" << turtle.sex << endl;
}