C++商店管理系统

embedded/2024/9/23 14:55:15/

代码中使用了C++11的特性

后面有些输出(cout输出的)的提示文本是英文,因为懒得敲中文

源码在最后面 文末投票参与一下谢谢

商品数据保存在

items.txt

用户数据保存在

users.txt

实现功能

1.添加商品(商品ID,商品名,库存数量,价格)填写完信息后询问是否执行
2.修改商品(先提示原有信息,再修改:商品名,库存数量,价格)填写完信息后询问是否执行
3.删除商品(删除该商品信息)填写完信息后询问是否执行
4.查找商品(按商品ID查询/按商品名查询)
5.创建用户(用户ID,用户名,金钱,密码,电话号码)填写完信息后询问是否执行
6.修改用户(先提示原有信息,再修改:用户名,金钱,密码,电话号码)填写完信息后询问是否执行
7.删除用户(删除某个用户的所有信息)填写完信息后询问是否执行
8.充值/扣款(输入用户ID,询问充值/扣款,并输入金额)填写完信息后询问是否执行
9.显示所有用户
10.显示所有商品
11.购买商品(先列出所有商品,再输入用户ID(用户不存在提示失败),密码(如果密码不对提示失败),购买商品总数,购买商品的ID(根据购买总数输入一个商品ID或一组商品ID)依次询问每一个商品ID买几份,最后计算总金额,如果该用户钱不够则提示“金额不足”,如果钱够询问是否购买,并扣除金额,在商品数据里扣除库存)填写完信息后询问是否执行

数据结构

商品数据结构

ID,名称,库存,价格

struct Item {string id;string name;int stock;double price;
};

用户数据结构

ID,用户名,金钱,密码,电话号码

struct User {string id;string username;double money;string password;string phone;
};

效果图

菜单

显示商品

源代码

编译注意事项

在连接器命令行加入以下命令

-std=c++11

源代码(main.cpp 此处就不分成多个文件了)

#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <string>
#include <cstring>
#include <algorithm> // For find_if
using namespace std;struct Item {string id;string name;int stock;double price;
};struct User {string id;string username;double money;string password;string phone;
};vector<Item> items;
vector<User> users;const string itemsFile = "items.txt";
const string usersFile = "users.txt";void loadItems() {ifstream file(itemsFile);if (!file) return;Item item;string line;while (getline(file, line)) {istringstream ss(line);getline(ss, item.id, ',');getline(ss, item.name, ',');ss >> item.stock;ss.ignore();ss >> item.price;items.push_back(item);}file.close();
}void saveItems() {ofstream file(itemsFile);for (const auto& item : items) {file << item.id << ',' << item.name << ',' << item.stock << ',' << item.price << '\n';}file.close();
}void loadUsers() {ifstream file(usersFile);if (!file) return;User user;string line;while (getline(file, line)) {istringstream ss(line);getline(ss, user.id, ',');getline(ss, user.username, ',');ss >> user.money;ss.ignore();getline(ss, user.password, ',');getline(ss, user.phone, ',');users.push_back(user);}file.close();
}void saveUsers() {ofstream file(usersFile);for (const auto& user : users) {file << user.id << ',' << user.username << ',' << user.money << ',' << user.password << ',' << user.phone << '\n';}file.close();
}bool isIDUnique(const string& id, const vector<Item>& itemsList) {for (const auto& item : itemsList) {if (item.id == id) return false;}return true;
}bool isIDUnique(const string& id, const vector<User>& usersList) {for (const auto& user : usersList) {if (user.id == id) return false;}return true;
}void addItem() {Item item;cout << "Enter item ID: ";cin >> item.id;if (!isIDUnique(item.id, items)) {cout << "Item ID already exists.\n";return;}cout << "Enter item name: ";cin >> item.name;cout << "Enter item stock: ";cin >> item.stock;cout << "Enter item price: ";cin >> item.price;cout << "Confirm addition (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {items.push_back(item);saveItems();cout << "Item added successfully.\n";} else {cout << "Item addition cancelled.\n";}
}void modifyItem() {string id;cout << "Enter item ID to modify: ";cin >> id;auto it = find_if(items.begin(), items.end(), [&id](const Item& item) { return item.id == id; });if (it == items.end()) {cout << "Item not found.\n";return;}Item original = *it;cout << "Current item information: \n";cout << "ID: " << original.id << "\n";cout << "Name: " << original.name << "\n";cout << "Stock: " << original.stock << "\n";cout << "Price: " << original.price << "\n";cout << "Enter new item name: ";cin >> it->name;cout << "Enter new item stock: ";cin >> it->stock;cout << "Enter new item price: ";cin >> it->price;cout << "Confirm modification (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {saveItems();cout << "Item modified successfully.\n";} else {cout << "Item modification cancelled.\n";}
}void deleteItem() {string id;cout << "Enter item ID to delete: ";cin >> id;auto it = remove_if(items.begin(), items.end(), [&id](const Item& item) { return item.id == id; });if (it == items.end()) {cout << "Item not found.\n";return;}cout << "Confirm deletion (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {items.erase(it, items.end());saveItems();cout << "Item deleted successfully.\n";} else {cout << "Item deletion cancelled.\n";}
}void searchItem() {int choice;cout << "Search by (1) ID or (2) Name: ";cin >> choice;if (choice == 1) {string id;cout << "Enter item ID: ";cin >> id;auto it = find_if(items.begin(), items.end(), [&id](const Item& item) { return item.id == id; });if (it == items.end()) {cout << "Item not found.\n";} else {cout << "ID: " << it->id << "\n";cout << "Name: " << it->name << "\n";cout << "Stock: " << it->stock << "\n";cout << "Price: " << it->price << "\n";}} else if (choice == 2) {string name;cout << "Enter item name (or part of it): ";cin >> name;bool found = false;for (const auto& item : items) {if (strstr(item.name.c_str(), name.c_str())) {cout << "ID: " << item.id << "\n";cout << "Name: " << item.name << "\n";cout << "Stock: " << item.stock << "\n";cout << "Price: " << item.price << "\n";found = true;}}if (!found) {cout << "No items found.\n";}} else {cout << "Invalid choice.\n";}
}void addUser() {User user;cout << "Enter user ID: ";cin >> user.id;if (!isIDUnique(user.id, users)) {cout << "User ID already exists.\n";return;}cout << "Enter username: ";cin >> user.username;cout << "Enter money: ";cin >> user.money;cout << "Enter password: ";cin >> user.password;cout << "Enter phone number: ";cin >> user.phone;cout << "Confirm addition (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {users.push_back(user);saveUsers();cout << "User added successfully.\n";} else {cout << "User addition cancelled.\n";}
}void modifyUser() {string id;cout << "Enter user ID to modify: ";cin >> id;auto it = find_if(users.begin(), users.end(), [&id](const User& user) { return user.id == id; });if (it == users.end()) {cout << "User not found.\n";return;}User original = *it;cout << "Current user information: \n";cout << "ID: " << original.id << "\n";cout << "Username: " << original.username << "\n";cout << "Money: " << original.money << "\n";cout << "Password: " << original.password << "\n";cout << "Phone: " << original.phone << "\n";cout << "Enter new username: ";cin >> it->username;cout << "Enter new money: ";cin >> it->money;cout << "Enter new password: ";cin >> it->password;cout << "Enter new phone number: ";cin >> it->phone;cout << "Confirm modification (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {saveUsers();cout << "User modified successfully.\n";} else {cout << "User modification cancelled.\n";}
}void deleteUser() {string id;cout << "Enter user ID to delete: ";cin >> id;auto it = remove_if(users.begin(), users.end(), [&id](const User& user) { return user.id == id; });if (it == users.end()) {cout << "User not found.\n";return;}cout << "Confirm deletion (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {users.erase(it, users.end());saveUsers();cout << "User deleted successfully.\n";} else {cout << "User deletion cancelled.\n";}
}void rechargeDeduct() {string id;cout << "Enter user ID: ";cin >> id;auto it = find_if(users.begin(), users.end(), [&id](const User& user) { return user.id == id; });if (it == users.end()) {cout << "User not found.\n";return;}cout << "Enter (1) Recharge or (2) Deduct: ";int choice;cin >> choice;double amount;cout << "Enter amount: ";cin >> amount;if (choice == 1) {it->money += amount;} else if (choice == 2) {if (it->money < amount) {cout << "马内不够 Insufficient funds.\n";return;}it->money -= amount;} else {cout << "无效的选择 Invalid choice.\n";return;}cout << "确认交易 (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {saveUsers();cout << "交易成功 Transaction successful.\n";} else {cout << "交易已取消 Transaction cancelled.\n";}
}void displayUsers() {for (const auto& user : users) {cout << "唯一身份 ID: " << user.id << "\n";cout << "用户名 Username: " << user.username << "\n";cout << "金钱 Money: " << user.money << "\n";cout << "手机号 Phone: " << user.phone << "\n";cout << "----------------------\n";}
}void displayItems() {for (const auto& item : items) {cout << "唯一身份 ID: " << item.id << "\n";cout << "名称 Name: " << item.name << "\n";cout << "库存 Stock: " << item.stock << "\n";cout << "价格 Price: " << item.price << "\n";cout << "----------------------\n";}
}void purchaseItem() {displayItems();string userID;cout << "输入用户ID Enter user ID: ";cin >> userID;auto userIt = find_if(users.begin(), users.end(), [&userID](const User& user) { return user.id == userID; });if (userIt == users.end()) {cout << "用户不存在 User not found.\n";return;}string password;cout << "输入密码 Enter password: ";cin >> password;if (userIt->password != password) {cout << "密码问题 Incorrect password.\n";return;}int itemCount;cout << "输入要购买的商品类型总数 Enter total number of item types to purchase: ";cin >> itemCount;vector<Item> purchaseItems;double totalAmount = 0.0;for (int i = 0; i < itemCount; ++i) {string itemID;cout << "输入要购买的商品ID Enter item ID to purchase: ";cin >> itemID;auto itemIt = find_if(items.begin(), items.end(), [&itemID](const Item& item) { return item.id == itemID; });if (itemIt == items.end()) {cout << "找不到商品 Item not found.\n";return;}int quantity;cout << "输入商品的数量 Enter quantity for item " << itemID << ": ";cin >> quantity;if (itemIt->stock < quantity) {cout << "没有足够的库存 Not enough stock for item " << itemID << ".\n";return;}totalAmount += itemIt->price * quantity;itemIt->stock -= quantity;}if (userIt->money < totalAmount) {cout << "没钱你买个屁 Insufficient funds.\n";return;}cout << "确认购买总金额 Confirm purchase of total amount " << totalAmount << " (y/n)? ";char confirm;cin >> confirm;if (confirm == 'y' || confirm == 'Y') {userIt->money -= totalAmount;saveUsers();saveItems();cout << "购买成功 Purchase successful.\n";} else {cout << "购买已取消 Purchase cancelled.\n";}
}int main() {loadItems();loadUsers();int choice;do {cout << "Store Management System\n";cout << "1. Add Item              添加商品\n";cout << "2. Modify Item           修改商品\n";cout << "3. Delete Item           删除商品\n";cout << "4. Search Item           搜索商品\n";cout << "5. Add User              添加用户\n";cout << "6. Modify User           修改用户\n";cout << "7. Delete User           删除用户\n";cout << "8. Recharge/Deduct Money 充值扣款\n";cout << "9. Display Users         显示用户\n";cout << "10. Display Items        显示商品\n";cout << "11. Purchase Item        购买商品\n";cout << "0. Exit                  退出系统\n";cout << "输入你的选择 Enter your choice: ";cin >> choice;switch (choice) {case 1: addItem(); break;case 2: modifyItem(); break;case 3: deleteItem(); break;case 4: searchItem(); break;case 5: addUser(); break;case 6: modifyUser(); break;case 7: deleteUser(); break;case 8: rechargeDeduct(); break;case 9: displayUsers(); break;case 10: displayItems(); break;case 11: purchaseItem(); break;case 0: break;default: cout << "无效的选择 请重试 Invalid choice. Try again.\n"; break;}} while (choice != 0);return 0;
}

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