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;
}送一句:
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