多态应用实例--制作饮品

#include<iostream>
using namespace std;

class AbstractDrinking
{
public: // 注意这里不写的话默认是private的
    // 纯虚函数
    // 这个类叫抽象类，无法实例化对象，子类必须重写父类中的函数
    virtual void boil() = 0;
    virtual void Brew() = 0;
    virtual void PourIncup() = 0;
    virtual void Add() = 0;
    void makeDrink() {
        boil();
        Brew();
        PourIncup();
        Add();
    }
};

class Coffee : public AbstractDrinking
{
public:
    void boil() {
        cout << "煮水" << endl;
    }
    virtual void Brew() {
        cout << "加咖啡" << endl;
    }
    virtual void PourIncup() {
        cout << "倒水" << endl;
    }
    virtual void Add() {
        cout << "加牛奶" << endl;
    }
    
};

class Tea : public AbstractDrinking
{
public:
    void boil() {
        cout << "煮水" << endl;
    }
    virtual void Brew() {
        cout << "加茶叶" << endl;
    }
    virtual void PourIncup() {
        cout << "倒水进杯" << endl;
    }
    virtual void Add() {
        cout << "加点枸杞" << endl;
    }

};
void doWork(AbstractDrinking * abs) {
    abs->makeDrink();
    delete abs; // 释放堆区的数据
}
void test01() {
    doWork(new Coffee);

    cout << "chaye " << endl;

    doWork(new Tea);
}



int main() {

    test01();
    return 0;
}