---

文章目录

前言

一、程序运行展示

二、数据结构分析

三、代码开源

1.主函数

2.头文件

3.函数文件

后记

---

前言

       程序设计基础实验课项目二：模拟一个网店购物过程（可以说是和双十一紧密结合了），经过一周的不懈努力（摸鱼），终于实现了第一个千行代码的项目🤯🤯🤯

---

一、程序运行展示

        废话不多说，直接上程序运行截图：

---

主要功能有两大部分，第一部分是用户界面，每个用户都有属于自己的购物车，可以查询和搜索店铺中现有的商品，并且增删改查自己的购物车，当然最主要的功能当然是付款结账（剁手党狂喜🥰）；第二部分是管理员界面，可以增删改查店铺的商品信息和商品数量，同时维护了一个售货清单，用来记录所有用户的购买记录，并且自动合并同类商品的售货信息。

除此之外功能（bug）还有很多，欢迎大家自己尝试~

---

二、数据结构分析

本项目中采用面向对象式设计，所有变量和函数封装在一个类shopping中，将问题看作可以嵌套的对象，再一个一个解决。主函数、头文件、函数实现分别放在三个任务中。这样做的好处是便于解决购物系统中遇到的繁多而琐碎的问题，也方便函数之间的调用，让整体框架更清晰，函数之间的关系更加清晰，主函数简短。接下来具体展示代码实现（其中函数主要有四部分：界面实现、管理员功能函数、用户功能函数和文件操作相关函数）。

---

三、代码开源

1.主函数

//main.cpp#include<iostream> #include<fstream> #include<cstring> #include"Shopping.h" using namespace std;int main() //短小精悍的main函数(bushi {Shopping sp;sp.show();system("pause");return 0; }

---

2.头文件

//Shopping.h#pragma once #include<cstring> using namespace std; const int Max_num = 105;//单个商品结构体，包括两段ID、名称、品牌、价格、数量 struct item {char ID_1;int ID_2;string name;string brand;float price;int amount; };//用户结构体，包括用户名称，用户密码，收货地址，用户购物车 struct user {string name;string password;string address="none";item shopping_car[Max_num];//购物车由商品结构体数组实现int shopping_car_num = 0; //购物车中商品数量 };//已售商品结构体，包括两段ID、名称、品牌、价格、已售数量、购买用户 struct sale_item {char ID_1;int ID_2;string name;string brand;float price;int amount;string my_user; };//新建一个购物系统的类 class Shopping { private:const string admin_ID ="nju_shopping"; //管理员IDconst string admin_passwd = "201830210"; //管理员密码const char all_items_address[20] = "D:\\库存.txt"; //库存文件地址const char sales_list_address[20] = "D:\\已售清单.txt" ; //售货清单文件地址const char all_users_address[20] = "D:\\用户.txt"; //用户列表文件地址const char users_shopping_address[20] = "D:\\收货地址.txt"; //用户收货地址文件地址public:item all_items[Max_num]; //店铺库存，由商品结构体数组实现user all_users[Max_num]; //用户列表，由用户结构体数组实现sale_item all_sales[Max_num]; //售货清单，由已售商品结构体数组实现int item_num = 0; //当前库存商品种类数int user_num = 0; //用户列表数量int sale_item_num = 0; //售货清单数量//友好的UI界面void show(); //显示主界面void users_enter(); //用户登录界面void users_register(); //用户注册界面void administrator_enter(); //管理员登录界面void admin_operate(); //管理员操作界面void user_operate(int index,user* this_user); //用户操作界面,需要的参数为:该用户在用户列表中的下标以及该结构体//文件相关操作void read_all_the_items(); //读取库存文件void write_all_the_items(); //写入库存文件void read_the_sales_list(); //读取售货清单void write_the_sales_list(); //写入售货清单void read_all_the_users(); //读取用户列表void write_all_the_users(); //写入用户列表void read_shopping_address(); //读取收货地址void write_shopping_address(); //写入收货地址void read_shopping_car(user* this_user); //读取用户购物车文件void write_shopping_car(user* this_user); //写入用户购物车文件//管理员相关操作void show_items(); //查询商品void add_item(); //增加商品void delete_item(); //删除商品void change_item(); //修改商品数量void show_sales_list(); //售货清单//用户相关操作void visit_items(); //查看商品void search_item(); //商品搜索void add_shopping_car(int index, user* this_user); //添加商品至购物车void delete_shopping_car(int index, user* this_user); //删除购物车商品void visit_shopping_car(int index, user* this_user); //查看购物车void check_out(int index, user* this_user); //结账void change_password(int index, user* this_user); //拓展功能：用户修改密码void change_address(int index, user* this_user); //拓展功能：管理收货地址};

---

3.函数文件

#include<iostream> #include<cstring> #include<fstream> #include"Shopping.h" using namespace std;//显示主界面 void Shopping::show() {cout <<"====================================================================================================" << endl;cout << " ";cout<<"\033[34;1m欢迎使用\033[0m"<<"\033[35;1mNJU_SHOPPING\033[0m"<<"\033[36;1m购物系统,\033[0m"<<"\033[33;1m请输入对应操作\033[0m" << endl;cout << "====================================================================================================" << endl;cout << "\033[33;1m1.用户登录 2.用户注册 3.管理员登录 4.退出系统\033[0m" << endl;int n;cout << "输入操作：" << endl;cin >> n;while (n != 4){switch (n){case 1:users_enter();break;case 2:users_register();break;case 3:administrator_enter();break;case 8:admin_operate(); //直接登入管理员界面便于debugbreak;case 9:user_operate(0, &all_users[0]);break;default:cout << "\033[31;1m错误的操作指令！\033[0m" << endl;break;}cout << "===========================================================" << endl;cout << "\033[33;1m1.用户登录 2.用户注册 3.管理员登录 4.退出系统\033[0m" << endl;cout << "输入操作：" << endl;cin >> n;}cout << "\033[33;1m欢迎下次使用！\033[0m" << endl; }//用户登录界面 附加功能：密码错误提示及次数上限 void Shopping::users_enter() {read_all_the_users(); //读取用户列表int cnt = 0;while (cnt < 3){string name, passwd;cout << "输入用户名：";cin >> name;cout << "输入密码：";cin >> passwd;int i;for (i = 0; i < user_num; i++){if (name == all_users[i].name && passwd == all_users[i].password){cout << "*******" << endl;cout << "登录成功！" << endl;cout << "*******" << endl;user_operate(i,&all_users[i]); //传入用户在用户列表中的下标和结构体指针break;}}if (i < user_num)break;else if(i==user_num){cnt++;cout << "用户名或密码错误，请再次输入用户名与密码，";cout << "你还有" << 3 - cnt << "次机会" << endl;}}if (cnt == 3)cout << "错误次数已达上限，系统关闭！" << endl; }//用户注册界面 附加功能：已存在的用户名或过短的密码都不符合要求，需要重新输入 void Shopping::users_register() {read_all_the_users(); //读取用户列表string name, passwd;cout << "输入用户名：";cin >> name;while (true){int i;for (i = 0; i < user_num; i++){if (all_users[i].name == name){cout << "用户名已存在，请重新输入！" << endl;break;}}if (i == user_num) //合法的用户名break;else if (i < user_num){cout << "输入用户名：";cin >> name;}}cout << "输入密码：";cin >> passwd;while (passwd.size() <= 3){cout << "密码长度太短，请重新输入！" << endl;cout << "输入密码：";cin >> passwd;}//新建一个用户user_num++;all_users[user_num-1].name = name;all_users[user_num-1].password = passwd;all_users[user_num-1].shopping_car_num = 0;write_shopping_car(&all_users[user_num - 1]); //创建购物车文件write_all_the_users(); //写入用户列表//注册成功并登录cout << "***************" << endl;cout << "注册成功！登录成功！" << endl;cout << "***************" << endl;user_operate(user_num-1, &all_users[user_num-1]);//传入用户在用户列表中的下标和结构体指针}//管理员登录界面 附加功能：密码错误提示及次数上限 void Shopping::administrator_enter() {int cnt = 0;while (cnt < 3){cout << "输入管理员ID：";string id, passwd;cin >> id;cout << "输入管理员密码：";cin >> passwd;if (id == admin_ID && passwd == admin_passwd){cout << "*******" << endl;cout << "登录成功！" << endl;cout << "*******" << endl;admin_operate();break;}else{cnt++;cout << "ID或密码错误，请再次输入管理员ID与密码，";cout << "你还有" << 3 - cnt << "次机会" << endl;}}if (cnt == 3)cout << "错误次数已达上限，系统关闭！" << endl; }//文件相关操作 //读取库存文件 void Shopping::read_all_the_items() {item_num = 0;//先将库存货物种类置为0ifstream in_file(all_items_address, ios::in);if (in_file.is_open() == 0)cout << "打开文件错误！" << endl;string a, b, c, d, e;in_file >> a >> b >> c >> d >> e;//读入文件表头while (in_file.peek()!=EOF)//读入库存数据{in_file >> all_items[item_num].ID_1;in_file >> all_items[item_num].ID_2;in_file >> all_items[item_num].name; in_file >> all_items[item_num].brand;in_file >> all_items[item_num].price; in_file >> all_items[item_num].amount;if(all_items[item_num].ID_1=='F') //用于规避文件结尾的空白行item_num++;} }//写入库存文件 void Shopping::write_all_the_items() {//更新的商品信息写入库存文件ofstream out_file(all_items_address, ios::out);out_file << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" << endl;for (int i = 0; i < item_num; i++){out_file << all_items[i].ID_1 << "00";if (all_items[i].ID_2 < 10)out_file << "0";out_file << all_items[i].ID_2 << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_items[i].name << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_items[i].brand << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_items[i].price << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_items[i].amount << "\t";out_file << endl;} }//读取售货清单 void Shopping::read_the_sales_list() {sale_item_num = 0;//先将售货清单数量置为0ifstream in_file(sales_list_address, ios::in);if (in_file.is_open() == 0)cout << "打开文件错误！" << endl;string a, b, c, d, e,f;in_file >> a >> b >> c >> d >> e>>f; //读入文件表头while (in_file.peek() != EOF) {in_file >> all_sales[sale_item_num].ID_1; in_file >> all_sales[sale_item_num].ID_2;in_file >> all_sales[sale_item_num].name;in_file >> all_sales[sale_item_num].brand;in_file >> all_sales[sale_item_num].price;in_file >> all_sales[sale_item_num].amount;in_file >> all_sales[sale_item_num].my_user;if (all_sales[sale_item_num].ID_1 == 'F') //用于规避文件结尾的空白行sale_item_num++;} }//写入售货清单 void Shopping::write_the_sales_list() {//更新的售货清单写入文件ofstream out_file(sales_list_address, ios::out);out_file << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" <<" "<<"用户名"<< endl;for (int i = 0; i < sale_item_num; i++){out_file << all_sales[i].ID_1 << "00";if (all_sales[i].ID_2 < 10)out_file << "0";out_file << all_sales[i].ID_2 << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_sales[i].name << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_sales[i].brand << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_sales[i].price << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_sales[i].amount << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_sales[i].my_user << "\t";out_file << endl;} }//读取用户列表 void Shopping::read_all_the_users() {user_num = 0;//先将用户数量置为0ifstream in_file(all_users_address, ios::in);if (in_file.is_open() == 0)cout << "打开文件错误！" << endl;string a, b;in_file >> a >> b ; //读入文件表头while (in_file.peek() != EOF) {in_file >> all_users[user_num].name;in_file >> all_users[user_num].password;if (all_users[user_num].name[0]>='a'&& all_users[user_num].name[0]<='z') //用于规避文件结尾的空白行user_num++;} }//写入用户列表 void Shopping::write_all_the_users() {//更新的用户列表写入库存文件ofstream out_file(all_users_address, ios::out);out_file << "用户名\t"<< "密码\t\t" <<endl;for (int i = 0; i < user_num; i++){out_file.width(10);out_file.setf(ios::left);out_file << all_users[i].name << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_users[i].password << "\t";out_file << endl;} }//读取收货地址 void Shopping::read_shopping_address() {read_all_the_users(); //先读取用户列表ifstream in_file(users_shopping_address, ios::in);if (in_file.is_open() == 0)cout << "打开文件错误！" << endl;string a, b;in_file >> a >> b; //读入文件表头while (in_file.peek() != EOF) {string name,address;in_file >> name >> address;for (int i = 0; i < user_num; i++)if (name == all_users[i].name) //找到该用户all_users[i].address = address; //修改该用户地址} }//写入收货地址 void Shopping::write_shopping_address() {read_all_the_users(); //先读取用户列表//更新的收货地址写入文件ofstream out_file(users_shopping_address, ios::out);out_file << "用户名\t" << "收货地址\t\t" << endl;for (int i = 0; i < user_num; i++){out_file.width(10);out_file.setf(ios::left);out_file << all_users[i].name << "\t";out_file.width(10);out_file.setf(ios::left);out_file << all_users[i].address << "\t";out_file << endl;} }//读取用户购物车 void Shopping::read_shopping_car(user* this_user) {this_user->shopping_car_num = 0;//先将购物车商品种类置为0string shopping_car_address = "D:\\" + this_user->name + ".txt";//设置购物车文件地址ifstream in_file(shopping_car_address, ios::in);if (in_file.is_open() == 0)cout << "打开文件错误！" << endl;string a, b, c, d, e;in_file >> a >> b >> c >> d >> e; //读入文件表头while (!in_file.eof()) //读入库存数据{in_file >> this_user->shopping_car[this_user->shopping_car_num].ID_1;in_file >> this_user->shopping_car[this_user->shopping_car_num].ID_2;in_file >> this_user->shopping_car[this_user->shopping_car_num].name;in_file >> this_user->shopping_car[this_user->shopping_car_num].brand;in_file >> this_user->shopping_car[this_user->shopping_car_num].price;in_file >> this_user->shopping_car[this_user->shopping_car_num].amount;if (this_user->shopping_car[this_user->shopping_car_num].ID_1 == 'F') //用于规避文件结尾的空白行this_user->shopping_car_num++;} }//写入用户购物车 void Shopping::write_shopping_car(user* this_user) {//更新的用户购物车写入库存文件string shopping_car_address = "D:\\" + this_user->name + ".txt";//设置购物车文件地址ofstream out_file(shopping_car_address, ios::out);if (this_user->shopping_car_num != 0){out_file << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" << endl;for (int i = 0; i < this_user->shopping_car_num; i++){out_file << this_user->shopping_car[i].ID_1 << "00";if (this_user->shopping_car[i].ID_2 < 10)out_file << "0";out_file << this_user->shopping_car[i].ID_2 << "\t";out_file.width(10);out_file.setf(ios::left);out_file << this_user->shopping_car[i].name << "\t";out_file.width(10);out_file.setf(ios::left);out_file << this_user->shopping_car[i].brand << "\t";out_file.width(10);out_file.setf(ios::left);out_file << this_user->shopping_car[i].price << "\t";out_file.width(10);out_file.setf(ios::left);out_file << this_user->shopping_car[i].amount << "\t";out_file << endl;}} }//管理员相关操作 //管理员操作界面 void Shopping::admin_operate() {cout << "=========================================================================================" << endl;cout << "\033[33;1m0.注销登录 1.查询商品 2.增加商品 3.删除商品 4.修改产品数量 5.查询售货清单\033[0m" << endl;cout << "输入操作：";int n;cin >> n;while (n != 0){switch (n){case 1:show_items();break;case 2:add_item();break;case 3:delete_item();break;case 4:change_item();break;case 5:show_sales_list();break;default:cout << "\033[31;1m错误的操作指令！\033[0m" << endl;break;}cout << "=========================================================================================" << endl;cout << "\033[33;1m0.注销登录 1.查询商品 2.增加商品 3.删除商品 4.修改产品数量 5.售货清单\033[0m" << endl;cout << "输入操作：" << endl;cin >> n;}cout << "退出登录！" << endl; }//管理员查询商品，先读入库存文件，再进行输出 void Shopping::show_items() {read_all_the_items(); //读入库存文件//输出库存商品数据，数量为0的商品也要输出if (item_num == 0)cout << "当前库存为空！" << endl;else {cout << "********************************************************************************" << endl;cout << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" << endl;for (int i = 0; i < item_num; i++){//输出库存商品信息，通过控制位宽和制表符实现整齐的顺序if (all_items[i].amount >= 0||all_items[i].amount==-1){cout << all_items[i].ID_1 << "00";if (all_items[i].ID_2 < 10)cout << "0";cout<< all_items[i].ID_2 << "\t\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].name<<"\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].brand << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].price << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].amount << "\t";cout << endl;}}cout << "********************************************************************************" << endl;} }//管理员添加商品，先读入库存文件，再添加商品，最后写入库存文件 void Shopping::add_item() {read_all_the_items();cout << "请输入要进货的商品ID：";string s;cin >> s;//获取新增商品的ID，存入number变量int number;if (s[3] == '0')number = s[4] - '0';elsenumber = (s[4] - '0') + (s[3] - '0') * 10;int i = 0;for(i=0;i<item_num;i++){if (all_items[i].ID_2 == number){int n;cout << "新增该商品的数量为：";cin >> n;all_items[i].amount += n;cout << "新增成功！该商品现在的数量为" << all_items[i].amount << endl;break;}}if (i == item_num&&item_num<Max_num) //没有找到对应的ID，新建一种商品{item_num++; //商品种类数+1all_items[item_num-1].ID_1 = all_items[item_num - 2].ID_1; //开头序号相同all_items[item_num-1].ID_2 = all_items[item_num - 2].ID_2+1; //序号编码+1cout << "库存中没有找到对应ID，将自动新建一种商品，请输入该商品的名称：";cin >> all_items[item_num-1].name;cout << "请输入该商品的品牌：";cin >> all_items[item_num-1].brand;cout << "请输入该商品的价格：";cin >> all_items[item_num-1].price;cout << "请输入该商品的数量：";cin >> all_items[item_num-1].amount;cout << "添加成功！" << endl;}//更新的商品信息写入库存文件write_all_the_items(); }//管理员删除商品，先读入库存文件，再删除商品，最后写入库存文件 void Shopping::delete_item() {read_all_the_items();cout << "请输入要删除的商品ID：";string s;cin >> s;//获取删除商品的ID，存入number变量int number;if (s[3] == '0')number = s[4] - '0';elsenumber = (s[4] - '0') + (s[3] - '0') * 10;int i = 0;for (i = 0; i < item_num; i++){if (all_items[i].ID_2 == number){all_items[i].amount = -1;cout << "删除成功！" << endl;break;}}if (i == item_num) //没有找到对应的IDcout << "没有找到对应的商品！" << endl;//更新的商品信息写入库存文件write_all_the_items(); }//管理员修改商品，先读入库存文件，再修改商品信息，最后写入库存文件 void Shopping::change_item() {read_all_the_items();cout << "请输入要修改的商品ID：";string s;cin >> s;//获取修改商品的ID，存入number变量int number;if (s[3] == '0')number = s[4] - '0';elsenumber = (s[4] - '0') + (s[3] - '0') * 10;int i = 0;for (i = 0; i < item_num; i++){if (all_items[i].ID_2 == number){cout << "请输入要修改的商品信息：1.名称 2.品牌 3.价格 4.数量" << endl;cout << "请输入操作：";int n;cin >> n;string str;switch (n){case 1:cout << "请输入修改后的名称：";cin >> str;all_items[i].name = str;cout << "修改成功！" << endl;break;case 2:cout << "请输入修改后的品牌：";cin >> str;all_items[i].brand = str;cout << "修改成功！" << endl;break;case 3:cout << "请输入修改后的价格：";float x;cin >> x;all_items[i].price = x;if (x < 0)cout << "修改失败！价格不能为负！" << endl;elsecout << "修改成功！" << endl;break;case 4:cout << "请输入修改后的数量：";int amt;cin >> amt;all_items[i].amount = amt;cout << "修改成功！" << endl;break;default:cout << "错误的操作数！" << endl;break;}break;}}if (i == item_num) //没有找到对应的IDcout << "没有找到对应的商品！" << endl;//更新的商品信息写入库存文件write_all_the_items(); }//管理员查询售出清单，先读文件，再合并同类项，最后按照ID升序输出 void Shopping::show_sales_list() {read_the_sales_list(); //读取售货清单//根据ID冒泡排序for(int i=0; i<sale_item_num-1; i++)for (int j = 0; j < sale_item_num - i - 1; j++){//若前者ID大于后者，结构体内容交换if (all_sales[j].ID_2 > all_sales[j + 1].ID_2){int temp1 = all_sales[j].ID_2;all_sales[j].ID_2 = all_sales[j + 1].ID_2;all_sales[j + 1].ID_2 = temp1;char temp2 = all_sales[j].ID_1;all_sales[j].ID_1 = all_sales[j + 1].ID_1;all_sales[j + 1].ID_1 = temp2;string temp3 = all_sales[j].name;all_sales[j].name = all_sales[j + 1].name;all_sales[j + 1].name = temp3;string temp4 = all_sales[j].brand;all_sales[j].brand = all_sales[j + 1].brand;all_sales[j + 1].brand = temp4;float temp5 = all_sales[j].price;all_sales[j].price = all_sales[j + 1].price;all_sales[j + 1].price = temp5;int temp6 = all_sales[j].amount;all_sales[j].amount = all_sales[j + 1].amount;all_sales[j + 1].amount = temp6;string temp7 = all_sales[j].my_user;all_sales[j].my_user = all_sales[j + 1].my_user;all_sales[j + 1].my_user = temp7;}}//合并同类项，对于相同的商品将已售数量累加到第一条记录中，其余置为-1for (int i = 0; i < sale_item_num - 1; i++){if (all_sales[i].amount == -1)continue;for (int j = i + 1; j < sale_item_num ; j++){if (all_sales[j].amount == -1)continue;if (all_sales[i].ID_2 == all_sales[j].ID_2 && all_sales[i].name == all_sales[j].name && all_sales[i].brand == all_sales[j].brand && all_sales[i].price == all_sales[j].price){all_sales[i].amount += all_sales[j].amount;all_sales[j].amount = -1;}}}if (sale_item_num == 0)cout << "当前售货清单为空！" << endl;else{cout << "********************************************************************************" << endl;cout << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "已售数量" << endl;for (int i = 0; i < sale_item_num; i++){//输出库存商品信息，通过控制位宽和制表符实现整齐的顺序if (all_sales[i].amount > 0){cout << all_sales[i].ID_1 << "00";if (all_sales[i].ID_2 < 10)cout << "0";cout << all_sales[i].ID_2 << "\t\t";cout.width(10);cout.setf(ios::left);cout << all_sales[i].name << "\t";cout.width(10);cout.setf(ios::left);cout << all_sales[i].brand << "\t";cout.width(10);cout.setf(ios::left);cout << all_sales[i].price << "\t";cout.width(10);cout.setf(ios::left);cout << all_sales[i].amount << "\t";cout << endl;}}cout << "********************************************************************************" << endl;} }//用户相关操作 //用户操作界面 void Shopping::user_operate(int index, user* this_user) {cout << "=========================================================================================" << endl;cout << "\033[33;1m1.注销登录 2.查看商品 3.商品搜索 4.添加商品至购物车\033[0m" << endl;cout << "\033[33;1m5.删除购物车商品 6.查看购物车 7.结账 8.修改密码 9.管理收货地址\033[0m" << endl;cout << "输入操作：";int n;cin >> n;write_shopping_address();while (n != 1){switch (n){case 2:visit_items();break;case 3:search_item();break;case 4:add_shopping_car(index, this_user);break;case 5:delete_shopping_car(index, this_user);break;case 6:visit_shopping_car(index, this_user);break;case 7:check_out(index, this_user);break;case 8:change_password(index, this_user);break;case 9:change_address(index, this_user);break;default:cout << "\033[31;1m错误的操作指令！\033[0m" << endl;break;}cout << "=========================================================================================" << endl;cout << "\033[33;1m1.注销登录 2.查看商品 3.商品搜索 4.添加商品至购物车\033[0m" << endl;cout << "\033[33;1m5.删除购物车商品 6.查看购物车 7.结账 8.修改密码 9.管理收货地址\033[0m" << endl;cout << "输入操作：" << endl;cin >> n;}cout << "退出登录！" << endl; }//用户查看商品，读入库存文件，再按要求输出 void Shopping::visit_items() {read_all_the_items(); //读入库存文件//输出库存商品数据，数量为0的商品不需要输出if (item_num == 0)cout << "当前库存为空！" << endl;else{cout << "********************************************************************************" << endl;cout << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" << endl;for (int i = 0; i < item_num; i++){//输出库存商品信息，通过控制位宽和制表符实现整齐的顺序if (all_items[i].amount > 0){cout << all_items[i].ID_1 << "00";if (all_items[i].ID_2 < 10)cout << "0";cout << all_items[i].ID_2 << "\t\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].name << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].brand << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].price << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].amount << "\t";cout << endl;}}cout << "********************************************************************************" << endl;} }//用户搜索商品 扩展功能：可选择名称+品牌的搜索方式 void Shopping::search_item() {read_all_the_items(); //读取库存string choice; //选择搜索方式cout << "请选择商品搜索方式：1.名称搜索 2.名称+品牌搜索" << endl;cout << "请输入商品搜索方式：";cin >> choice;//第一种搜索方式if (choice == "1"){int flag = 0; //表示搜索是否成功cout << "请输入商品名称：";string name;cin >> name;for (int i = 0; i < item_num; i++){if (all_items[i].amount > 0&&all_items[i].name == name) //搜索成功{if (flag == 0) //如果是搜索到的第一个商品，输出表头{cout << "********************************************************************************" << endl;cout << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" << endl;flag = 1;}//输出搜索结果cout << all_items[i].ID_1 << "00";if (all_items[i].ID_2 < 10)cout << "0";cout << all_items[i].ID_2 << "\t\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].name << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].brand << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].price << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].amount << "\t";cout << endl;}}if (flag == 1) //搜索成功，输出表尾cout << "********************************************************************************" << endl;else //搜索失败，输出提示语cout << "未找到该商品，试试换一个词搜索吧！" << endl;}//第二种搜索方式else if(choice=="2"){int flag = 0; //表示搜索是否成功cout << "请输入商品名称：";string name;cin >> name;cout << "请输入商品品牌：";string brand;cin >> brand;for (int i = 0; i < item_num; i++){if (all_items[i].amount > 0&&all_items[i].name == name&& all_items[i].brand == brand) //搜索成功{if (flag == 0) //如果是搜索到的第一个商品，输出表头{cout << "********************************************************************************" << endl;cout << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" << endl;flag = 1;}//输出搜索结果cout << all_items[i].ID_1 << "00";if (all_items[i].ID_2 < 10)cout << "0";cout << all_items[i].ID_2 << "\t\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].name << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].brand << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].price << "\t";cout.width(10);cout.setf(ios::left);cout << all_items[i].amount << "\t";cout << endl;}}if (flag == 1) //搜索成功，输出表尾cout << "********************************************************************************" << endl;else //搜索不成功，输出提示语cout << "未找到该商品，试试换一个词搜索吧！" << endl;}elsecout << "\033[31;1m错误的操作指令！\033[0m" << endl; }//用户添加商品至购物车 void Shopping::add_shopping_car(int index, user* this_user) {read_all_the_items(); //读取库存read_shopping_car(this_user); //读取该用户购物车cout << "输入添加至购物车的商品ID：";string id;cin >> id;//获取新增商品的ID编号，存入number变量int number;if (id[3] == '0')number = id[4] - '0';elsenumber = (id[4] - '0') + (id[3] - '0') * 10;cout << "输入添加至购物车的商品数量：";int amount;cin >> amount;int i;for (i = 0; i < this_user->shopping_car_num; i++){if (this_user->shopping_car[i].ID_2 == number){int index = 0; //用来记录该商品在购物车中的下标for(int j=0;j<item_num;j++)if (all_items[j].ID_2 = number)index = j;if (amount > all_items[index].amount)//添加数量超过库存，添加失败{cout << "添加失败！添加数量超过商品库存，请修改！" << endl;break;}else //添加成功 {this_user->shopping_car[i].amount += amount;cout << "***************" << endl;cout << "加入购物车成功！" << endl;cout << "***************" << endl;write_shopping_car(this_user);break;} }}if (i == this_user->shopping_car_num) //购物车中未找到对应ID{int j;for(j=0;j<item_num;j++)if (all_items[j].ID_2 == number) //在库存中找到了对应ID{if (number > all_items[i].amount) //添加数量超过库存，添加失败{cout << "添加失败！添加数量超过商品库存，请修改！" << endl;break;}else //添加成功，购物车种类加一{this_user->shopping_car_num++;this_user->shopping_car[this_user->shopping_car_num - 1].ID_1 = all_items[j].ID_1;this_user->shopping_car[this_user->shopping_car_num - 1].ID_2 = number;this_user->shopping_car[this_user->shopping_car_num - 1].name = all_items[j].name;this_user->shopping_car[this_user->shopping_car_num - 1].brand = all_items[j].brand;this_user->shopping_car[this_user->shopping_car_num - 1].price = all_items[j].price;this_user->shopping_car[this_user->shopping_car_num - 1].amount = amount;write_shopping_car(this_user);cout << "***************" << endl;cout << "加入购物车成功！" << endl;cout << "***************" << endl;break;}}if(j==item_num){cout << "店铺中没找到该ID对应的商品，请检查是否输入正确！" << endl;}}//展示购物车cout << "购物车中现在有：" << endl;visit_shopping_car(index, this_user); }//用户删除购物车商品 void Shopping::delete_shopping_car(int index, user* this_user) {read_shopping_car(this_user); //读取该用户购物车cout << "输入待删除的商品ID：";string id;cin >> id;//获取待删除商品的ID编号，存入number变量int number;if (id[3] == '0')number = id[4] - '0';elsenumber = (id[4] - '0') + (id[3] - '0') * 10;cout << "输入待删除商品的数量：";int amount;cin >> amount;int i;for (i = 0; i < this_user->shopping_car_num; i++){if (this_user->shopping_car[i].ID_2 == number){this_user->shopping_car[i].amount -=amount;write_shopping_car(this_user);cout << "**********" << endl;cout << "删除成功！" << endl;cout << "**********" << endl;break;}}if(i== this_user->shopping_car_num)cout<<"购物车中没有该ID对应的商品，请检查是否输入错误！"<<endl;//展示购物车cout << "购物车中现在有：" << endl;visit_shopping_car(index, this_user);}//用户查看购物车，先读取对应的购物车文件再输出 void Shopping::visit_shopping_car(int index, user* this_user) {read_shopping_car(this_user); //读入库存文件//输出库存商品数据，数量为0的商品也要输出if (this_user->shopping_car_num == 0)cout << "当前购物车为空！去别处逛逛吧！" << endl;else{cout << "********************************************************************************" << endl;cout << "ID" << " " << "名称" << " " << "品牌" << " " << "价格" << " " << "数量" << endl;for (int i = 0; i < this_user->shopping_car_num; i++){//输出库存商品信息，通过控制位宽和制表符实现整齐的顺序if (this_user->shopping_car[i].amount > 0){cout << this_user->shopping_car[i].ID_1 << "00";if (this_user->shopping_car[i].ID_2 < 10)cout << "0";cout << this_user->shopping_car[i].ID_2 << "\t\t";cout.width(10);cout.setf(ios::left);cout << this_user->shopping_car[i].name << "\t";cout.width(10);cout.setf(ios::left);cout << this_user->shopping_car[i].brand << "\t";cout.width(10);cout.setf(ios::left);cout << this_user->shopping_car[i].price << "\t";cout.width(10);cout.setf(ios::left);cout << this_user->shopping_car[i].amount << "\t";cout << endl;}}cout << "********************************************************************************" << endl;} }//用户结账，需要修改用户购物车、库存和售货清单 void Shopping::check_out(int index, user* this_user) {//读取库存，购物车，收货地址和售货清单read_all_the_items();read_shopping_car(this_user);read_the_sales_list();read_shopping_address();visit_shopping_car(index, this_user);if (this_user->shopping_car_num > 0){if (this_user->address == "none"){string address;cout << "当前收货地址为空，请设置一个收货地址：";cin >> address;this_user->address = address;write_shopping_address();cout << "设置成功！" << endl;}cout << "当前收货地址为：" << this_user->address << endl;float money = 0; //待付金额=sum(单价*数量)for (int i = 0; i < this_user->shopping_car_num; i++)money += this_user->shopping_car[i].price * this_user->shopping_car[i].amount;cout << ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>" << endl;cout << "\033[31;1m一共需要付款\033[0m" << money << "\033[31;1m元！\033[0m";cout << "\033[31;1m确认付款请按1，取消付款请按0，请输入操作：\033[0m";int choice;cin >> choice;cout << ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>" << endl;if (choice == 0)cout << "已取消付款！" << endl;else if (choice == 1){//修改库存for (int i = 0; i < this_user->shopping_car_num; i++){int num = this_user->shopping_car[i].ID_2;for (int j = 0; j < item_num; j++)if (all_items[j].ID_2 == num)all_items[j].amount -= this_user->shopping_car[i].amount;}write_all_the_items();//修改售货清单for (int i = 0; i < this_user->shopping_car_num; i++){sale_item_num++;all_sales[sale_item_num - 1].ID_1 = this_user->shopping_car[i].ID_1;all_sales[sale_item_num - 1].ID_2 = this_user->shopping_car[i].ID_2;all_sales[sale_item_num - 1].name = this_user->shopping_car[i].name;all_sales[sale_item_num - 1].brand = this_user->shopping_car[i].brand;all_sales[sale_item_num - 1].price = this_user->shopping_car[i].price;all_sales[sale_item_num - 1].amount = this_user->shopping_car[i].amount;all_sales[sale_item_num - 1].my_user = this_user->name;}write_the_sales_list();//清空用户购物车for (int i = 0; i < this_user->shopping_car_num; i++)this_user->shopping_car[i].amount = 0;write_shopping_car(this_user);//输出提示语cout << "**********" << endl;cout << "付款成功！" << endl;cout << "**********" << endl;}}}//拓展功能：用户修改密码 void Shopping::change_password(int index, user* this_user) {cout << "请输入原密码：";string old_pass;cin >> old_pass;if (old_pass == this_user->password){string new_pass;cout << "请输入新密码：";cin >> new_pass;//设置新密码长度大于三位while (new_pass.size() <= 3){cout << "密码长度太短，请重新输入！" << endl;cout << "输入密码：";cin >> new_pass;}this_user->password = new_pass;write_all_the_users();cout << "**********" << endl;cout << "修改成功！" << endl;cout << "**********" << endl;}elsecout << "密码输入错误，修改失败！" << endl; }//拓展功能：管理收货地址 void Shopping::change_address(int index, user* this_user) {read_shopping_address(); //读取收货地址if (this_user->address != "none") //当前地址不为空{string address;cout << "当前的收货地址为：" << this_user->address << endl;cout << "修改后的收货地址为：";cin >> address;this_user->address = address;cout << "**********" << endl;cout << "修改成功！" << endl;cout << "**********" << endl;}else{cout << "当前地址为空，请输入你的收货地址：";string address;cin >> address;this_user->address = address;cout << "**********" << endl;cout << "修改成功！" << endl;cout << "**********" << endl;}write_shopping_address(); //写入文件中 }//完结撒花❤

---

后记

该项目是基于VS2019控制台和文件实现的，所以想要自己尝试的同学可以下载我分享在个人空间里的项目文件。另外课程PPT以及用户手册PPT我也会上传在个人空间里，能力有限，程序代码难免有许多不足，欢迎联系我交流讨论：201830210@smail.nju.edu.cn

本项目所有代码均为纯手打，版权所有，严禁抄袭，转载请注明出处。

总结

以上是生活随笔为你收集整理的【项目源码分享】基于C++实现的网店购物管理系统（VS2019控制台）的全部内容，希望文章能够帮你解决所遇到的问题。

如果觉得生活随笔网站内容还不错，欢迎将生活随笔推荐给好友。