C++程序设计课程设计报告

一、任务要求

该系统为两种角色的用户提供服务，一种是餐厅管理员，一种是顾客。餐厅管理员根据账号、密码登录系统。顾客无需登录即可使用系统。

顾客通过该餐厅在系统中提供的菜单为自己点餐。系统能够根据顾客的要求正确打出订单，订单内容包括订单编号、菜品名称、每个菜品的价格、份数、折扣等；订单分两种，一种是在店消费，在店消费要求包括餐桌号，是否有包厢费，另一种是外卖，外卖要求包括送餐时间，送餐地点，客户手机号，外卖服务费，成绩≥60；
订单、用户信息保存在数据库中，其中，连接数据库所需信息（数据库服务器地址、用户名、密码、数据库名）存放在文件中，程序通过从文件中读取这些信息获得与数据库的连接。餐厅管理员可以根据订单编号或手机号查找、删除或修改某个订单，查询到的订单按照下单时间先后显示，成绩≥70；
菜单信息保存在数据库中，能够实现对餐厅菜式和价格的管理，包括对菜品和对应价格的增加、修改、删除、查找，折扣的设置，设置后，顾客在点餐时看到的是新设置后的菜单，成绩≥80；
系统可根据数据库中保存的订单记录对销售情况进行统计，根据餐厅管理员的输入日期统计某天的销售情况（包括一共接了多少单，销售额是多少，各个菜品的销售情况，外卖和在店销售的占比）并显示订单详情，成绩≥90；

二、业务流程图

图 1用户点餐流程图图 2用户查询流程图图 3 管理员注册流程图图 4管理员登录流程图图 5用户增添流程图图 6管理员删除流程图图 7管理员修改流程图图 8 管理员查询流程图图 9管理员更新流程图

三、系统功能结构图

图 10 系统功能结构图

四、类的设计

图 11 UML图

五、数据库设计

图 12 ER图

图 13 ER图

建表语句：

CREATE TABLE customer (name_ varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,address varchar(200) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,phone varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,id int NOT NULL AUTO_INCREMENT,PRIMARY KEY (id) USING BTREE,UNIQUE INDEX un(name_ ASC, phone ASC) USING BTREE) ENGINE = InnoDB AUTO_INCREMENT = 33 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;CREATE TABLE dish (ID int NOT NULL AUTO_INCREMENT,originalprice double NOT NULL,discountedprice double NOT NULL,dishname varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,sale int NULL DEFAULT 0,category int NULL DEFAULT NULL,PRIMARY KEY (ID) USING BTREE) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;CREATE TABLE dish_menu (d_id int NOT NULL,numberofdish int NULL DEFAULT 0,o_ID int NOT NULL,INDEX d_id(d_id ASC) USING BTREE,INDEX o_ID(o_ID ASC) USING BTREE,CONSTRAINT dish_menu_ibfk_1 FOREIGN KEY (d_id) REFERENCES dish (ID) ON DELETE RESTRICT ON UPDATE RESTRICT,CONSTRAINT dish_menu_ibfk_2 FOREIGN KEY (o_ID) REFERENCES order_ (ID) ON DELETE RESTRICT ON UPDATE RESTRICT) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;CREATE TABLE manager (worknumber varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,password varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,PRIMARY KEY (worknumber) USING BTREE) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;CREATE TABLE order_ (ID int NOT NULL AUTO_INCREMENT,servicefeescale double NOT NULL,diningstyle tinyint(1) NOT NULL,peoplenumber int NOT NULL,desknumber varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,deliverytime datetime NOT NULL,c_id int NOT NULL,PRIMARY KEY (ID) USING BTREE,INDEX m_idx(c_id ASC) USING BTREE,CONSTRAINT a FOREIGN KEY (c_id) REFERENCES customer (id) ON DELETE RESTRICT ON UPDATE RESTRICT) ENGINE = InnoDB AUTO_INCREMENT = 22 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

六、程序代码与说明

//由于篇幅较长，此处只贴了声明的代码Customer.h#ifndef CUSTOMER_H#define CUSTOMER_H#include <QString>class Customer{QString name;QString address;QString phone;int ID=0;public:Customer(QString name, QString address, QString phone);const QString& getName() const;void setName(const QString& newName);const QString& getAddress() const;void setAddress(const QString& newAddress);const QString& getPhone() const;void setPhone(const QString& newPhone);int getID() const;void setID(int newID);};CustomerManager.h#endif // CUSTOMER_H#ifndef CUSTOMERMANAGER_H#define CUSTOMERMANAGER_H#include "MysqlManager.h"#include "customer.h"#include <QString>#include "dish.h"#include<iostream>#include <map>using std::map;class CustomerManager{MysqlManager* sqlManager;public:CustomerManager(MysqlManager* sqlManager);//对于顾客进行增删改查void addCustomer(Customer& c);void deleteCustomer(Customer& c);void modifyCustomer(Customer& c);void reserchDish(QString str);void reserchByNameAndPhone(QString name, QString phone,QString &address, int& c_ID);Customer* reserchByID(int c_ID);};#endif // CUSTOMERMANAGER_H#ifndef DISH_H#define DISH_H#include<QString>Dish.hclass Dish {QString productName;int ID;double originalPrice;double discountedPrice;int sale;int category;const static char* cg[];//int leftNum;//剩余量public:Dish(QString productName, double originalPrice, double discountedPrice, int sale,int category);const QString& getProductName() const;void setProductName(const QString& newProductName);double getOriginalPrice() const;void setOriginalPrice(double newOriginalPrice);double getDiscountedPrice() const;void setDiscountedPrice(double newDiscountedPrice);int getSale() const;void setSale(int newSale);int getID() const;void setID(int newID);int getCategory() const;void setCategory(int newCategory);bool operator==(const Dish& dish) const;bool operator<(const Dish& dish) const;//int getLeftNum() const;//void setLeftNum(int leftNum);static const char * getCg(int category);};Dishmanager.h#endif // DISH_H#ifndef DISHMANAGER_H#define DISHMANAGER_H#include <QString>#include <iostream>#include <vector>#include"dish.h"#include "MysqlManager.h"using std::vector;class DishManager {MysqlManager* sqlManager;public:DishManager(MysqlManager* sqlManager);//增删改查void addDish(Dish& d);void deleteDish(int id);void modifyDishByID(Dish& d);void reserchDish(QString str);vector<Dish> queryByCategory(int cg);vector<Dish> queryAll();};Employee.h#endif // DISHMANAGER_H#ifndef EMPLOYEE_H#define EMPLOYEE_H#include <QString>class Employee {QString workNumber;QString password;public:Employee(QString workNumber, QString password);const QString& getPassword() const;void setPassword(const QString& newPassword);const QString& getWorkNumber() const;void setWorkNumber(const QString& newWorkNumber);};Employeemanager.h#endif // EMPLOYEE_H#ifndef EMPLOYEEMANAGER_H#define EMPLOYEEMANAGER_H#include<QString>#include "employee.h"#include "MysqlManager.h"class EmployeeManager {MysqlManager* sqlManager;public:EmployeeManager(MysqlManager* sqlManager);//增删改查void addEmployee(const Employee& e);void deleteEmployee(Employee& e);void modifyEmployee(Employee& e);void reserchEmployee(QString str);//登录后台管理系统bool logIn(QString workNumber, QString passWord);//注册账号bool register_(QString workNumber, QString password, QString passwordAgain);};#endif // EMPLOYEEMANAGER_HManager.h#pragma once#include "customermanager.h"#include "dishmanager.h"#include "employeemanager.h"#include "menumanager.h"#include"ordermanager.h"#include "MysqlManager.h"class Manager{CustomerManager* customerManager;DishManager* dishManager;EmployeeManager* employeeManager;MenuManager* menuManager;OrderManager* orderManager;public:Manager(MysqlManager* mm);CustomerManager* getCustomerManager() const;DishManager* getDishManager() const;EmployeeManager* getEmployeeManager() const;MenuManager* getMenuManager() const;OrderManager* getOrderManager() const;};Menu.h#pragma once#include "customermanager.h"#include "dishmanager.h"#include "employeemanager.h"#include "menumanager.h"#include"ordermanager.h"#include "MysqlManager.h"class Manager{CustomerManager* customerManager;DishManager* dishManager;EmployeeManager* employeeManager;MenuManager* menuManager;OrderManager* orderManager;public:Manager(MysqlManager* mm);CustomerManager* getCustomerManager() const;DishManager* getDishManager() const;EmployeeManager* getEmployeeManager() const;MenuManager* getMenuManager() const;OrderManager* getOrderManager() const;};Menumanager.h#ifndef MENUMANAGER_H#define MENUMANAGER_H#include <QString>#include "menu.h"#include "MysqlManager.h"class MenuManager{MysqlManager* sqlManager;public:MenuManager(MysqlManager* sqlManager);void addMenu(const Menu& m);void deleteMenu(Menu& m);void modifyMenu(Menu& m);Menu& queryById(int o_id);};#endif // MENUMANAGER_HMenuwindow.h#pragma once#include <qwidget.h>#include "dishmanager.h"#include "manager.h"#include <iostream>#include <map>#include <QTableWidgetItem>using std::map;namespace Ui {class MenuForm;}class MenuWindow:public QWidget{Q_OBJECTprivate:Ui::MenuForm* ui;Manager* manager;vector<Dish> currentDishes=nullptr;map<Dish, int> numOfDish;double sumMoney = 0;bool isUserChange = true;public:MenuWindow(Manager* manager,QWidget* parent = nullptr);void updateDishes(int category);void setAllbuttonunchecked();void setUnedited(int row, int currentrow, QString text);~MenuWindow();private slots:void onreCommendButtonClick();void onVegetableButtonClick();void onStapleButtonClick();void onSeafoodButtonClick();void onMeatButtonClick();void onDiscountedButtonClick();void onDessertButtonClick();void changeItem(QTableWidgetItem* item);void onCheckOutButtonClick();void onQueryButtonClick();};Mysqlmanager.h#ifndef CONNECTMYSQL_H#define CONNECTMYSQL_H#include <mysql.h>#include <string>using std::string;class MysqlManager{string host;string user;string psw;string schema;int port = 0;public:MysqlManager();MYSQL* connect();void close(MYSQL* mysql);};#endif // CONNECTMYSQL_HOrder.h#ifndef ORDER_H#define ORDER_H#include"dish.h"#include<vector>using std::vector;class Order{int ID;bool diningStyle;//0为堂食，1为外卖int peopleNumber;QString deskNumber;QString deliverTime;int c_id;public:Order(bool diningStyle, int peopleNumber, const QString& deskNumber, const QString& deliverTime, int c_id);//根据就餐方式，判断服务费或是外卖费，再根据桌号判断就餐费double getServiceFeeScale() const;int getC_id() const;void setC_id(int newC_id);bool getDiningStyle() const;void setDiningStyle(bool newDiningStyle);int getPeopleNumber() const;void setPeopleNumber(int newPeopleNumber);const QString& getDeskNumber() const;void setDeskNumber(const QString& newDeskNumber);int getID() const;void setID(int newID);const QString getDeliverTime() const;void setDeliverTime(const QString deliverTime);};#endif // ORDER_HOrderhallwindow.h#pragma once#include "qwidget.h"#include "manager.h"#include <iostream>#include <map>using std::map;namespace Ui {class OrderHallForm;}class OrderHallWindow : public QWidget{Q_OBJECTprivate:Ui::OrderHallForm* ui;Manager* manager;int orderNumber;bool mealFormat;QString tableNumber;double boxFee;map<Dish, int> numOfDish;double sumMoney;Customer* cus;public:OrderHallWindow(int orderNumber,bool mealFormat,QString tableNumber,double boxFee,map<Dish, int> numOfDish,double sumMoney,Customercus,Manager manager);void updateDishes();~OrderHallWindow();};Ordermanager.h#ifndef ORDERMANAGER_H#define ORDERMANAGER_H#include "MysqlManager.h"#include "order.h"class OrderManager{MysqlManager* sqlManager;public:OrderManager(MysqlManager* sqlManager);void addOrder(Order& o);void deleteOrder(int o_ID);void modifyOrder(Order& o);QString getTime(Order& o); void rearchByC_ID(int c_ID,int &o_ID, double& serviceFeeScale,bool &diningStyle,QString &deskNumber,QString &time);vector<Order> rearchAll(vector<int>* o_ID, vector<int>* c_ID);vector<Order> rearchByTime(QString time, vector<int>* o_ID, vector<int>* c_ID);vector<int>* rearchByC_ID();};#endif // ORDERMANAGER_HOrdertakewindow.h#pragma once#include "qwidget.h"#include "manager.h"#include <iostream>#include <map>OrderTakeWindow.husing std::map;namespace Ui {class OrderTakeForm;}class OrderTakeWindow : public QWidget{Q_OBJECTprivate:Ui::OrderTakeForm* ui;Manager* manager;int orderNumber;bool mealFormat;double takeFee;map<Dish, int> numOfDish;double sumMoney;Customer* cus;QString time;public:OrderTakeWindow(int orderNumber, bool mealFormat, double takeFee, map<Dish, int> numOfDish, double sumMoney, Customer* cus,QString time,Manager*manager);void updateDishes();~OrderTakeWindow();};#pragma once#include "qwidget.h"#include "manager.h"namespace Ui {class QueryWindow;};class QueryCustomerImformation:public QWidget{Q_OBJECT;private:Ui::QueryWindow* ui;Manager* manager;public:QueryCustomerImformation(Manager *manager);~QueryCustomerImformation();private slots:void onQueryButtonClicked();};Startwindow.h#ifndef STARTWINDOW_H#define STARTWINDOW_H#include <QWidget>#include "manager.h"QT_BEGIN_NAMESPACEnamespace Ui {class Form;}QT_END_NAMESPACEclass StartWindow:public QWidget{Q_OBJECTprivate:Manager* manager;Ui::Form* ui;public:StartWindow(Manager* manager,QWidget* parent = nullptr);~StartWindow();private slots:void onManagerButtonClick();void onCustomerButtonClick();};BackOfficeManagement.h#endif // STARTWINDOW_H#pragma once#include "manager.h"#include <qwidget.h>#include<QTableWidgetItem>namespace Ui {class BackForm;}class BackOfficeManagement:public QWidget{Q_OBJECTprivate:int orderNum=0;double sumMoney=0;int divisionNum=0;Ui::BackForm* ui;Manager* manager;vector<Dish> dishes=nullptr;vector<Order> orders;vector<Customer> cus;vector<int>* o_id;vector<int>* c_id;bool isUserChange =true;public:BackOfficeManagement(Manager* manager);void updateDishes();void setAllbuttonunchecked();void updateOrder();~BackOfficeManagement();private slots:void onMenuManagerButtonClick();void onOrderManagerButtonClick();void addItem();void deleteItem();void changeItem(QTableWidgetItem* item);};#pragma onceComboItemDelegate.h#include <QItemDelegate>#include <QStringList>#include <QStyledItemDelegate>#include <QValidator>#include <QWidget>class ComboItemDelegate : public QStyledItemDelegate {Q_OBJECTQStringList items;public:ComboItemDelegate(QStringList items, QObject* parent = 0);QWidget* createEditor(QWidget* parent, const QStyleOptionViewItem& option,const QModelIndex& index) const;void setEditorData(QWidget* editor, const QModelIndex& index) const;void setModelData(QWidget* editor, QAbstractItemModel* model,const QModelIndex& index) const;void updateEditorGeometry(QWidget* editor,const QStyleOptionViewItem& option,const QModelIndex& index) const;};#pragma once#include <qwidget.h>#include"manager.h"#include<QStatusBar>LogInWindow.hnamespace Ui {class LoginWindow;}class LogInWindow:public QWidget{Q_OBJECTprivate:Ui::LoginWindow* ui;Manager* manager; QStatusBar* m_statusBar;public:LogInWindow(Manager* manager);~LogInWindow();private slots:void onRegButtonClick();void onLoginButtonClick();};RegWindow.h#pragma once#include <qwidget.h>#include"manager.h"namespace Ui {class RegisterWindow;}class RegWindow:public QWidget{Q_OBJECTprivate:Ui::RegisterWindow* ui;Manager* manager;public:RegWindow(Manager* manager);~RegWindow();private slots:void onBackButtonClick();void onRegButtonClick();};

七、运行结果与分析

八、心得与体会

1. 运用了QT

学会了使用QT来实现程序的可视化，便于与用户的交互，并实现了程序的简易性与可重复利用性。并且不仅是尝试去运用QT的GUI，还尝试了用代码实现对于窗口或是控件的书写。这相较于传统的命令行，会更加地有趣，并极大的便利了开发者。

2. 连接数据库

一开始尝试用QT与数据库直连，但由于安装版本过高，网上教程较少，最终没有成功，但在中途多次尝试，虽说没有成功，但也学到了许多知识。最后运用c++的mysql库，实现了功能。

3. 数据库的学习

在本学期由于学习了数据库，因此，这次课设对于我来说，也是一次对于数据库学习的检验，更增强了我对于数据库知识的巩固。

4. 学习了项目相关的画图软件的应用

在本次实验中，第一次接触了类图、流程图与项目管理图，更加体会到一项工程的产生多么来之不易，也对于c++这类编程语言，产生了更加深刻的理解。

5. 使用了表达式

运用正则表达式，对于数据的输入进行限制，以便于用户的交互。

6. 异常处理

通过课上所学习的异常处理，来运用于程序当中，实现异常处理机制，从而解决多数无法用异常处理能够迎刃而解的问题。

详细工程链接