多态案例02-制作饮品

示例：

#include<iostream>
using namespace std;
class AbstractDrinking
{
    public:
    //煮水 boil煮水 
        virtual void Boil()=0;
    //沏茶brew 
        virtual void Brew()=0;
    //倒入杯中
        virtual void Incup()=0;
    // 加入佐料
        virtual void PutSomething()=0;
    void show()
    {
        Boil();
        Brew();
        Incup();
        PutSomething();
    }
};
class Coffee:public AbstractDrinking
{
    public:
        void Boil()
        {
            cout<<"煮露水"<<endl;
        }
        void Brew()
        {
            cout<<"沏咖啡"<<endl;
        }
        void Incup()
        {
            cout<<"倒入杯中"<<endl;
        } 
        void PutSomething()
        {
            cout<<"加入牛奶"<<endl;
        }
};
class Tea:public AbstractDrinking
{
    public:
        void Boil()
        {
            cout<<"煮水"<<endl; 
        }
        void Brew()
        {
            cout<<"沏茶"<<endl; 
        }
        void Incup()
        {
            cout<<"倒入杯中"<<endl;
        }
        void PutSomething()
        {
            cout<<"加入柠檬"<<endl; 
        }
};
void test(AbstractDrinking *pre)//这里相当于AbstractDrinking *per=new Coffee 
{
    pre->show();
    return ;
}
void test01()
{
    test(new Coffee);
    cout<<"*****************"<<endl;
    test(new Tea);
} 
int main()
{
    test01();
    return 0;