C++商店管理系统

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

C++商店管理系统_第1张图片

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 
#include 
#include 
#include 
#include 
#include 
#include  // 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 items;
vector 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& itemsList) {
    for (const auto& item : itemsList) {
        if (item.id == id) return false;
    }
    return true;
}

bool isIDUnique(const string& id, const vector& 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 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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