给出体育器材管理系统代码 需要有用户登录和管理者登录功能

好的，下面是一个体育器材管理系统的简单示例代码，包括用户登录和管理员登录功能：

#include <iostream>
#include <string>
#include <vector>

using namespace std;

// 定义器材结构体
struct Equipment {
    string name; // 器材名称
    string model; // 器材型号
    int quantity; // 器材数量
    string status; // 器材状态
};

// 定义借用记录结构体
struct BorrowRecord {
    string equipmentName; // 器材名称
    string borrowerName; // 借用人姓名
    string borrowTime; // 借用时间
    string returnTime; // 归还时间
};

// 定义用户结构体
struct User {
    string username; // 用户名
    string password; // 密码
    string role; // 角色
};

// 定义全局变量
vector<Equipment> equipments; // 器材列表
vector<BorrowRecord> borrowRecords; // 借用记录列表
vector<User> users; // 用户列表

// 登录函数
bool login(string username, string password, string role) {
    // 遍历用户列表，查找匹配的用户
    for (int i = 0; i < users.size(); i++) {
        if (users[i].username == username
            && users[i].password == password
            && users[i].role == role) {
            return true;
        }
    }
    return false;
}

// 添加器材函数
void addEquipment() {
    Equipment equipment;
    cout << "请输入器材名称：";
    cin >> equipment.name;
    cout << "请输入器材型号：";
    cin >> equipment.model;
    cout << "请输入器材数量：";
    cin >> equipment.quantity;
    cout << "请输入器材状态：";
    cin >> equipment.status;
    equipments.push_back(equipment);
    cout << "添加成功！" << endl;
}

// 查询器材函数
void queryEquipment() {
    string name;
    cout << "请输入要查询的器材名称：";
    cin >> name;
    for (int i = 0; i < equipments.size(); i++) {
        if (equipments[i].name == name) {
            cout << "器材名称：" << equipments[i].name << endl;
            cout << "器材型号：" << equipments[i].model << endl;
            cout << "器材数量：" << equipments[i].quantity << endl;
            cout << "器材状态：" << equipments[i].status << endl;
            return;
        }
    }
    cout << "未找到该器材！" << endl;
}

// 借用器材函数
void borrowEquipment() {
    BorrowRecord record;
    cout << "请输入借用人姓名：";
    cin >> record.borrowerName;
    cout << "请输入要借用的器材名称：";
    cin >> record.equipmentName;
    cout << "请输入借用时间：";
    cin >> record.borrowTime;
    // 更新器材数量和状态
    for (int i = 0; i < equipments.size(); i++) {
        if (equipments[i].name == record.equipmentName) {
            equipments[i].quantity--;
            equipments[i].status = "已借出";
        }
    }
    borrowRecords.push_back(record);
    cout << "借用成功！" << endl;
}

// 归还器材函数
void returnEquipment() {
    string name;
    cout << "请输入要归还的器材名称：";
    cin >> name;
    for (int i = 0; i < equipments.size(); i++) {
        if (equipments[i].name == name) {
            equipments[i].quantity++;
            equipments[i].status = "未借出";
            break;
        }
    }
    for (int i = 0; i < borrowRecords.size(); i++) {
        if (borrowRecords[i].equipmentName == name && borrowRecords[i].returnTime.empty()) {
            cout << "请输入归还时间：";
            cin >> borrowRecords[i].returnTime;
            break;
        }
    }
    cout << "归还成功！" << endl;
}

// 维修器材函数
void repairEquipment() {
    string name;
    cout << "请输入需要维修的器材名称：";
    cin >> name;
    for (int i = 0; i < equipments.size(); i++) {
        if (equipments[i].name == name) {
            equipments[i].status = "维修中";
            break;
        }
    }
    cout << "维修成功！" << endl;
}

// 删除器材函数
void deleteEquipment() {
    string name;
    cout << "请输入要删除的器材名称：";
    cin >> name;
    for (int i = 0; i < equipments.size(); i++) {
        if (equipments[i].name == name) {
            equipments.erase(equipments.begin() + i);
            break;
        }
    }
    cout << "删除成功！" << endl;
}

// 显示菜单
void displayMenu() {
    cout << "欢迎使用体育器材管理系统！" << endl;
    cout << "1. 用户登录" << endl;
    cout << "2. 管理员登录" << endl;
    cout << "3. 退出系统" << endl;
}

// 显示用户菜单
void displayUserMenu() {
    cout << "请选择操作：" << endl;
    cout << "1. 查询器材" << endl;
    cout << "2. 借用器材" << endl;
    cout << "3. 归还器材" << endl;
    cout << "4. 退出系统" << endl;
}

// 显示管理员菜单
void displayAdminMenu() {
    cout << "请选择操作：" << endl;
    cout << "1. 添加器材" << endl;
    cout << "2. 查询器材" << endl;
    cout << "3. 借用器材" << endl;
    cout << "4. 归还器材" << endl;
    cout << "5. 维修器材" << endl;
    cout << "6. 删除器材" << endl;
    cout << "7. 退出系统" << endl;
}

int main() {
    // 添加用户
    User user1 = { "user1", "123456", "user" };
    User user2 = { "user2", "123456", "user" };
    User admin1 = { "admin1", "123456", "admin" };
    User admin2 = { "admin2", "123456", "admin" };
    users.push_back(user1);
    users.push_back(user2);
    users.push_back(admin1);
    users.push_back(admin2);

    int choice;
    bool isLoggedIn = false;
    string username;
    string password;
    string role;

    while (true) {
        displayMenu();
        cin >> choice;

        switch (choice) {
        case 1:
            // 用户登录
            role = "user";
            break;
        case 2:
            // 管理员登录
            role = "admin";
            break;
        case 3:
            // 退出系统
            return 0;
        default:
            cout << "无效的选择！" << endl;
            continue;
        }

        cout << "请输入用户名：";
        cin >> username;
        cout << "请输入密码：";
        cin >> password;

        if (login(username, password, role)) {
            isLoggedIn = true;
            break;
        }
        else {
            cout << "登录失败！" << endl;
        }
    }

    if (role == "user") {
        while (true) {
            displayUserMenu();
            cin >> choice;

            switch (choice) {
            case 1:
                // 查询器材
                queryEquipment();
                break;
            case 2:
                // 借用器材
                borrowEquipment();
                break;
            case 3:
                // 归还器材
                returnEquipment();
                break;
            case 4:
                // 退出系统
                return 0;
            default:
                cout << "无效的选择！" << endl;
                break;
            }
        }
    }
    else if (role == "admin") {
        while (true) {
            displayAdminMenu();
            cin >> choice;

            switch (choice) {
            case 1:
                // 添加器材
                addEquipment();
                break;
            case 2:
                // 查询器材
                queryEquipment();
                break;
            case 3:
                // 借用器材
                borrowEquipment();
                break;
            case 4:
                // 归还器材
                returnEquipment();
                break;
            case 5:
                // 维修器材
                repairEquipment();
                break;
            case 6:
                // 删除器材
                deleteEquipment();
                break;
            case 7:
                // 退出系统
                return 0;
            default:
                cout << "无效的选择！" << endl;
                break;
            }
        }
    }

    return 0;
}

请注意，此代码仅供参考，实际应用中可能需要根据不同的需求进行修改和调整。