一、题目分析

同学们应该都去麦当劳或肯德基吃过快餐吧？请同学们参考肯德基官网的信息模拟肯德基快餐店的收银系统，合理使用C++或Java或Python结合设计模式（2种以上）至少实现系统的以下功能：

1.正常餐品结算和找零。
2.基本套餐结算和找零。
3.使用优惠劵购买餐品结算和找零。
4.可在一定时间段参与店内活动（自行设计或参考官网信息）。
5.模拟打印小票的功能（写到文件中）。

基本要求：

程序设计风格良好，控制台界面友好，最多两人一组完成任务。
实现功能测试代码，确保程序的健壮性。
画出使用的设计模式图。

提高要求：

实现可视化界面（使用MFC）。
实现会员储值卡功能，完成储值卡消费。
实现当天营业额和餐品销量计算和统计，用数据库记录

二、类图设计

三、程序实现

#include<iostream> #include<string> #include<fstream> using namespace std; class Food { 
    protected: string name; double price; int num; public: virtual double get_sum() { 
    double sum = price * num; return sum; } virtual void set_name(string name) { 
    this->name = name; } virtual string get_name() { 
    return name; } virtual void set_price(double price) { 
    this->price = price; } virtual double get_price() { 
    return price; } virtual void set_num(int num) { 
    this->num = num; } virtual int get_num() { 
    return num; } }; class Hamburger :public Food { 
    public: virtual double get_sum() { 
    double sum = price * num; return sum; } }; class Snack :public Food { 
    public: virtual double get_sum() { 
    double sum = price * num; return sum; } }; class Drink :public Food { 
    public: virtual double get_sum() { 
    double sum = price * num; return sum; } }; class Set :public Food { 
    public: virtual double get_sum() { 
    double sum = price * num; return sum; } }; class Factory { 
    public: virtual Food* food() = 0; }; class Factory_Hamburger :public Factory { 
    public: Food* food() { 
    return new Hamburger; } }; class Factory_Snack :public Factory { 
    public: Food* food() { 
    return new Snack; } }; class Factory_Drink :public Factory { 
    public: Food* food() { 
    return new Drink; } }; class Factory_Set :public Factory { 
    public: Food* food() { 
    return new Set; } }; class xiaopiao { 
    public: virtual void output() = 0; } ; class H1 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "巨无霸--" << num << "份" <<endl; outfile << "巨无霸--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class H2 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "双层吉士汉堡--" << num << "份" <<endl; outfile << "双层吉士汉堡--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class H3 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "麦辣鸡腿汉堡--" << num << "份" <<endl; outfile << "麦辣鸡腿汉堡--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class S1 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "大薯条--" << num << "份" <<endl; outfile << "大薯条--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class S2 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "麦乐鸡--" << num << "份" <<endl; outfile << "麦乐鸡--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class D1 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "可口可乐--" << num << "份" <<endl; outfile << "可口可乐--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class D2 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "七喜--" << num << "份" <<endl; outfile << "七喜--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class D3 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "麦乐酷--" << num << "份" <<endl; outfile << "麦乐酷--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class SET1 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "巨无霸超值套餐--" << num << "份" <<endl; outfile << "巨无霸超值套餐--" << num << "份" << endl; outfile.close(); } } protected: int num; }; class SET2 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    if(0 != num) { 
    ofstream outfile("receipt.dat", ios::out); cout << "双层吉士汉堡超值套餐--" << 1 << "份" <<endl; outfile << "双层吉士汉堡超值套餐--" << 1 << "份" << endl; outfile.close(); } } protected: int num; }; //运用策略模式简化  class Context { 
    public: Context(xiaopiao *p) : pStrategy(p) { 
    } void Interface() { 
    pStrategy->output(); } private: xiaopiao *pStrategy; }; class collect { 
    private: public: void main_menu() { 
    cout << " +++ +++ " << endl; cout << " ++ ++ ++ ++ " << endl; cout << " ++ ++ ++ ++ " << endl; cout << " ++ ++ ++ ++ " << endl; cout << " ++ ++ ++ ++ " << endl; cout << " ++ ++ ++ ++ " << endl; cout << "++ +++ ++" << endl; cout << "++ +++ ++" << endl; cout << "---------------------" << endl; cout << "欢迎进入麦当劳点餐系统！" << endl; cout << "---------------------" << endl; cout << "请问你选择单点(1)或者套餐(2)：" << endl; } void single_menu() { 
    cout << "---------------------" << endl; cout << "请选择您要点的产品: " << endl; cout << "主食: " << endl; cout << " 1.巨无霸 --17 " << endl; cout << " 2.双层吉士汉堡--15 " << endl; cout << " 3.麦辣鸡腿汉堡--15 " << endl; cout << "配餐: " << endl; cout << " 4.大薯条 --11 " << endl; cout << " 5.麦乐鸡 --9 " << endl; cout << "饮料: " << endl; cout << " 6.可口可乐 --7 " << endl; cout << " 7.七喜 --7 " << endl; cout << " 8.麦乐酷 --10 " << endl; cout << "若点餐结束，请输入0以结束点餐！" << endl; } void set_menu() { 
    cout << "---------------------" << endl; cout << "请选择您要点的套餐: " << endl; cout << " 1.巨无霸超值套餐 --25" << endl; cout << " （包含巨无霸一份、大薯条一份、可口可乐一份）" << endl; cout << " 2.双层吉士汉堡超值套餐 --23" << endl; cout << " （包含双层吉士汉堡一份、大薯条一份、可口可乐一份）" << endl; cout << "若点餐结束，请输入0以结束点餐！" << endl; } void menu() { 
    main_menu(); int choose; int hamburger[3], snack[2], drink[3],set[2]; for (int i = 0; i < 3; i++) { 
    hamburger[i] = 0; drink[i] = 0; } for (int i = 0; i < 2; i++) { 
    snack[i] = 0; set[i] = 0; } cin >> choose; if (1 == choose) { 
    single_menu(); int ch,flag=1; while(flag) { 
    cout << "请输入对应商品的序号:" ; cin >> ch; switch (ch) { 
    case(0): { 
    flag = 0; break; } case(1): { 
    cout << "请输入需要几份?:"; int number; cin >> number; hamburger[0] = number; break; } case(2): { 
    cout << "请输入需要几份?:"; int number; cin >> number; hamburger[1] = number; break; } case(3): { 
    cout << "请输入需要几份?:"; int number; cin >> number; hamburger[2] = number; break; } case(4): { 
    cout << "请输入需要几份?:"; int number; cin >> number; snack[0] = number; break; } case(5): { 
    cout << "请输入需要几份?:"; int number; cin >> number; snack[1] = number; break; } case(6): { 
    cout << "请输入需要几份?:"; int number; cin >> number; drink[0] = number; break; } case(7): { 
    cout << "请输入需要几份?:"; int number; cin >> number; drink[1] = number; break; } case(8): { 
    cout << "请输入需要几份?:"; int number; cin >> number; drink[2] = number; break; } default: { 
    cout << "请输入正确的序号！" << endl; break; } } } } else if (2 == choose) { 
    set_menu(); int ch, flag = 1; while (flag) { 
    cout << "请输入对应商品的序号:"; cin >> ch; switch (ch) { 
    case(0): { 
    flag = 0; break; } case(1): { 
    cout << "请输入需要几份?:"; int number; cin >> number; set[0] = number; break; } case(2): { 
    cout << "请输入需要几份?:"; int number; cin >> number; set[1] = number; break; } default: { 
    cout << "请输入正确的序号！" << endl; break; } } } } //生成汉堡工厂类 Factory_Hamburger* fac_h = new Factory_Hamburger(); //生成具体的汉堡类 Food* hamburger1 = fac_h->food(); Food* hamburger2 = fac_h->food(); Food* hamburger3 = fac_h->food(); //实例化各个汉堡 //巨无霸 hamburger1->set_name("巨无霸"); hamburger1->set_price(17); hamburger1->set_num(hamburger[0]); //双层吉士汉堡 hamburger2->set_name("双层吉士汉堡"); hamburger2->set_price(15); hamburger2->set_num(hamburger[1]); //麦辣鸡腿汉堡 hamburger3->set_name("麦辣鸡腿汉堡"); hamburger3->set_price(15); hamburger3->set_num(hamburger[2]); //生成小吃工厂类 Factory_Snack* fac_s = new Factory_Snack(); //生成具体的小吃类 Food* snack1 = fac_s->food(); Food* snack2 = fac_s->food(); //实例化各个小吃 //大薯条 snack1->set_name("大薯条"); snack1->set_price(11); snack1->set_num(snack[0]); //麦乐鸡 snack2->set_name("麦乐鸡"); snack2->set_price(9); snack2->set_num(snack[1]); //生成饮料工厂类 Factory_Drink* fac_d = new Factory_Drink(); //生成具体的饮料类 Food* drink1 = fac_d->food(); Food* drink2 = fac_d->food(); Food* drink3 = fac_d->food(); //实例化各个饮料 //可口可乐 drink1->set_name("可口可乐"); drink1->set_price(7); drink1->set_num(drink[0]); //七喜 drink2->set_name("七喜"); drink2->set_price(7); drink2->set_num(drink[1]); //麦乐酷 drink3->set_name("麦乐酷"); drink3->set_price(7); drink3->set_num(drink[2]); //生成套餐工厂类 Factory_Set* fac_se = new Factory_Set(); //生成具体的套餐类 Food* set1 = fac_se->food(); Food* set2 = fac_se->food(); //实例化各个套餐 //巨无霸超值套餐 set1->set_name("巨无霸超值套餐"); set1->set_price(25); set1->set_num(set[0]); //双层吉士汉堡超值套餐 set2->set_name("双层吉士汉堡超值套餐"); set2->set_price(23); set2->set_num(set[1]); //找零部分 cout << "---------------------" << endl; double sum = 0; sum = sum + hamburger1->get_sum(); sum = sum + hamburger2->get_sum(); sum = sum + hamburger3->get_sum(); sum = sum + snack1->get_sum(); sum = sum + snack2->get_sum(); sum = sum + drink1->get_sum(); sum = sum + drink2->get_sum(); sum = sum + drink3->get_sum(); sum = sum + set1->get_sum(); sum = sum + set2->get_sum(); cout << "您共计消费:" << sum << endl; cout << "请问您是否使用优惠券？(输入0已接受)"; int ch; cin >> ch; int yhq=0; if (0 == ch) { 
    cout << "您拥有如下优惠券:" << endl; cout << "-1.满50减5" << endl; cout << "-2.满100减15" << endl; cout << "-3.满200减40" << endl; cout << "每次消费仅能使用一张优惠券,请选择使用的优惠券" << endl; int flag = 1; while (flag) { 
    int ch; cin >> ch; if (ch == 1) { 
    if (sum > 50) { 
    sum -= 5; cout << "使用消费券成功!"; } else { 
    cout << "您的消费金额还不能使用优惠券！" << endl; } flag = 0; } if (ch == 2) { 
    if (sum > 100) { 
    sum -= 15; cout << "使用消费券成功!";} else { 
    cout << "您的消费金额还不能使用优惠券！" << endl; } flag = 0; } if (ch == 3) { 
    if (sum > 200) { 
    sum -= 40; cout << "使用消费券成功!";} else { 
    cout << "您的消费金额还不能使用优惠券！" << endl; } flag = 0; } if (ch == 0) { 
    cout << "不使用优惠券" << endl; flag = 0; } } } cout << "请问您支付多少:"; double pay; cin >> pay; double payback = pay - sum; while (0 > payback) { 
    cout << "想吃霸王餐？说！到底给多少?"; cin >> pay; payback = pay - sum; } cout << "共计收您" << pay << "。" << endl; cout << "找零为:" << payback << "" << endl; int cho; cout << "---------------------" << endl; cout << "请选择是否打印小票:(输入0以打印)" << endl; cin >> cho; if (0 == cho) { 
    //打印小票部分 /* ofstream outfile("receipt.dat", ios::out); cout << "---------------------" << endl; outfile << "---------------------" << endl; cout << "欢迎来到麦当劳欢乐餐厅！" << endl; outfile << "欢迎来到麦当劳欢乐餐厅！" << endl; cout << "您共计点餐:" << endl; outfile << "您共计点餐:" << endl; cout << endl; outfile << endl; if (0 != hamburger[0]) { cout << "巨无霸--" << hamburger[0] << "份" <<endl;outfile << "巨无霸--" << hamburger[0] << "份" << endl; } if (0 != hamburger[1]) { cout << "双层吉士汉堡--" << hamburger[1] << "份" << endl;outfile << "双层吉士汉堡--" << hamburger[1] << "份" << endl; } if (0 != hamburger[2]) { cout << "麦辣鸡腿汉堡--" << hamburger[2] << "份" << endl; outfile << "麦辣鸡腿汉堡--" << hamburger[2] << "份" << endl;} if (0 != snack[0]) { cout << "大薯条--" << snack[0] << "份" << endl;outfile << "大薯条--" << snack[0] << "份" << endl; } if (0 != snack[1]) { cout << "麦乐鸡--" << snack[1] << "份" << endl; outfile << "麦乐鸡--" << snack[1] << "份" << endl;} if (0 != drink[0]) { cout << "可口可乐--" << drink[0] << "份" << endl;outfile << "可口可乐--" << drink[0] << "份" << endl; } if (0 != drink[1]) { cout << "七喜--" << drink[1] << "份" << endl; outfile << "七喜--" << drink[1] << "份" << endl;} if (0 != drink[2]) { cout << "麦乐酷--" << drink[2] << "份" << endl;outfile << "麦乐酷--" << drink[2] << "份" << endl; } if (0 != set[0]) { cout << "巨无霸超值套餐--" << set[0] << "份" << endl;outfile << "巨无霸超值套餐--" << set[0] << "份" << endl; } if (0 != set[1]) { cout << "双层吉士汉堡超值套餐--" << set[1] << "份" << endl; outfile << "双层吉士汉堡超值套餐--" << set[1] << "份" << endl;} cout << "---------------------" << endl; outfile << "---------------------" << endl; cout << "共计收您" << pay << "。" << endl; outfile << "共计收您" << pay << "。" << endl; cout << "找零为:" << payback << "" << endl; outfile << "找零为:" << payback << "" << endl; */ ofstream outfile("receipt.dat", ios::out); cout << "---------------------" << endl; outfile << "---------------------" << endl; cout << "欢迎来到麦当劳欢乐餐厅！" << endl; outfile << "欢迎来到麦当劳欢乐餐厅！" << endl; cout << "您共计点餐:" << endl; outfile << "您共计点餐:" << endl; cout << endl; outfile << endl; H1 *h1 = new H1; h1->get_num(hamburger[0]); H2 *h2 = new H2; h2->get_num(hamburger[1]); H3 *h3 = new H3; h3->get_num(hamburger[2]); S1 *s1 = new S1; s1->get_num(snack[0]); S2 *s2 = new S2; s2->get_num(snack[1]); D1 *d1 = new D1; d1->get_num(drink[0]); D2 *d2 = new D2; d2->get_num(drink[1]); D3 *d3 = new D3; d3->get_num(drink[2]); SET1 *set1 = new SET1; set1->get_num(set[0]); SET2 *set2 = new SET2; set2->get_num(set[1]); Context *ph1 = new Context(h1); Context *ph2 = new Context(h2); Context *ph3 = new Context(h3); Context *ps1 = new Context(s1); Context *ps2 = new Context(s1); Context *pd1 = new Context(d1); Context *pd2 = new Context(d2); Context *pd3 = new Context(d3); Context *pset1 = new Context(set1); Context *pset2 = new Context(set2); ph1->Interface(); ph2->Interface(); ph3->Interface(); ps1->Interface(); ps2->Interface(); pd1->Interface(); pd2->Interface(); pd3->Interface(); pset1->Interface(); pset2->Interface(); cout << endl; outfile << endl; cout << "---------------------" << endl; outfile << "---------------------" << endl; cout << "---------------------" << endl; outfile << "---------------------" << endl; cout << endl; outfile << endl; cout << "共计收您" << pay << "。" << endl; outfile << "共计收您" << pay << "。" << endl; cout << "找零为:" << payback << "" << endl; outfile << "找零为:" << payback << "" << endl; outfile.close(); //运用策略模式简化上列大量if语句 } } }; int main() { 
    collect c; c.menu(); } 

四、测试及运行结果

（1）测试

#include <iostream> #include <fstream> using namespace std; class xiaopiao { 
    public: virtual void output() = 0; } ; class H1 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "巨无霸--" << num << "份" <<endl; outfile << "巨无霸--" << num << "份" << endl; outfile.close(); } protected: int num; }; class H2 : public xiaopiao { 
    public: void get_num(int n) { 
    num = n; } void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "双层吉士汉堡--" << num << "份" <<endl; outfile << "双层吉士汉堡--" << num << "份" << endl; outfile.close(); } protected: int num; }; class H3 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "麦辣鸡腿汉堡--" << 1 << "份" <<endl; outfile << "麦辣鸡腿汉堡--" << 1 << "份" << endl; outfile.close(); } }; class S1 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "大薯条--" << 1 << "份" <<endl; outfile << "大薯条--" << 1 << "份" << endl; outfile.close(); } }; class S2 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "麦乐鸡--" << 1 << "份" <<endl; outfile << "麦乐鸡--" << 1 << "份" << endl; outfile.close(); } }; class D1 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "可口可乐--" << 1 << "份" <<endl; outfile << "可口可乐--" << 1 << "份" << endl; outfile.close(); } }; class D2 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "七喜--" << 1 << "份" <<endl; outfile << "七喜--" << 1 << "份" << endl; outfile.close(); } }; class D3 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "麦乐酷--" << 1 << "份" <<endl; outfile << "麦乐酷--" << 1 << "份" << endl; outfile.close(); } }; class SET1 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "巨无霸超值套餐--" << 1 << "份" <<endl; outfile << "巨无霸超值套餐--" << 1 << "份" << endl; outfile.close(); } }; class SET2 : public xiaopiao { 
    public: void output() { 
    ofstream outfile("receipt.dat", ios::out); cout << "双层吉士汉堡超值套餐--" << 1 << "份" <<endl; outfile << "双层吉士汉堡超值套餐--" << 1 << "份" << endl; outfile.close(); } }; class Context { 
    public: Context(xiaopiao *p) : pStrategy(p) { 
    } void Interface() { 
    pStrategy->output(); } private: xiaopiao *pStrategy; }; int main() { 
    ofstream outfile("receipt.dat", ios::out); cout << "---------------------" << endl; outfile << "---------------------" << endl; cout << "欢迎来到麦当劳欢乐餐厅！" << endl; outfile << "欢迎来到麦当劳欢乐餐厅！" << endl; cout << "您共计点餐:" << endl; outfile << "您共计点餐:" << endl; cout << endl; outfile << endl; H1 *h1 = new H1; h1->get_num(2); H2 *h2 = new H2; h2->get_num(3); H3 *h3 = new H3; S1 *s1 = new S1; S2 *s2 = new S2; D1 *d1 = new D1; D2 *d2 = new D2; D3 *d3 = new D3; SET1 *set1 = new SET1; SET2 *set2 = new SET2; Context *ph1 = new Context(h1); Context *ph2 = new Context(h2); Context *ph3 = new Context(h3); Context *ps1 = new Context(s1); Context *ps2 = new Context(s1); Context *pd1 = new Context(d1); Context *pd2 = new Context(d2); Context *pd3 = new Context(d3); Context *pset1 = new Context(set1); Context *pset2 = new Context(set2); ph1->Interface(); ph2->Interface(); ph3->Interface(); ps1->Interface(); ps2->Interface(); pd1->Interface(); pd2->Interface(); pd3->Interface(); pset1->Interface(); pset2->Interface(); if (h1) delete h1; if (h2) delete h2; if (h3) delete h3; if (s1) delete s1; if (s2) delete s2; if (d1) delete h1; if (d2) delete d2; if (d3) delete d3; if (set1) delete set1; if (set2) delete set2; } 

（2）运行结果

五、经验归纳

这次的作业量比较大，代码的行数很多，写起来比较吃力，算是又一个写的比较大的工程了。在这次的作业中，主要是运用到了这段时间学习的设计模式中的策略模式和工厂模式，期中工厂模式负责生产餐厅中的各种食物的对象，策略模式负责在生成小票时避免出现冗杂的if语句。这次没有完成提高要求是一个遗憾，希望在今后能够将可视化的界面和数据库的连接在学习和运用后对程序进行改进。