建造者模式
#include <iostream>
#include <string>
#include <vector>
using namespace std;
class Packing {
public:
virtual string pack() {
return "";
}
};
class Wraper : public Packing {
public:
string pack() {
return "纸包装的食物";
}
};
class Botton : public Packing{
public:
string pack() {
return "杯子包装的食物";
}
};
class Item {
public:
virtual string name() = 0;
virtual Packing *packing() = 0;
virtual float price() = 0;
};
class Burger : public Item {
public:
float price() {
return 17.5;
}
Packing *packing() {
Packing *pack = new Wraper();
return pack;
}
string name() {
string n = "这是堡";
return n;
}
};
class Drank : public Item {
public:
float price() {
return 12.5;
}
Packing *packing() {
Packing *pack = new Botton();
return pack;
}
string name() {
string n = "这是饮料";
return n;
}
};
class VerBurger : public Burger {
public:
float price() {
return 10.5;
}
string name() {
string n = "田园果蔬堡";
return n;
}
};
class ChenBurger : public Burger {
public:
float price() {
return 20.5;
}
string name() {
string n = "奥尔良烤鸡腿堡";
return n;
}
};
class CocaColo : public Drank {
float price() {
return 15.5;
}
string name() {
string n = "可口可乐";
return n;
}
};
class Mail {
public:
vector<Item*> mailList;
void Order() {
int type = 0;
Item *it = nullptr;
cout << "输入1-3点餐，其他数字完成点餐^_^" << endl;
while (type != 100) {
cin >> type;
switch (type) {
case 1: it = new VerBurger(); mailList.push_back(it); break;
case 2: it = new ChenBurger(); mailList.push_back(it); break;
case 3: it = new CocaColo(); mailList.push_back(it); break;
default: type = 100; break;
}
}
}
void showDetal() {
float sum = 0.0;
for (int i = 0; i != mailList.size(); i++) {
sum += mailList[i]->price();
cout << mailList[i]->packing()->pack() << "包装的" << mailList[i]->name() << endl;
}
cout << "价值:" << sum << "元" << endl;
}
};
int main()
{
Mail *order = new Mail();
order->Order();
order->showDetal();
std::cout << "Hello World!\n";
}
