用C++设计一个小型企业工资管理系统。 设计说明：该小型企业的员工主要有 4 类：经理、技术员、销售员和计时工。要求存储员工的工号、姓名、岗位、月工资等基本信息。 工资计算方法： 1经理：领取固定月薪 8800 元 2技术员：分高级、中级、初级三类，其中高级固定每月 7700 元，中级 固定每月 6600 元，初级固定每月 5500 元 3销售员：底薪 2500+销售额*2%提成 4计时工：工作时间*每小时 66 元 该企业员工的类层次结构为：员工包含经理，技术员，销售员，计时工 要有一个菜单，用于选择各项功能： 1数据录入：输入各种数据（其中每类员工不能少于 3 人） 2数据查询：能根据工号或姓名查询工资信息 3职工信息的删除、修改 4工资计算：能对各类员工进行工资计算 5数据输出：能按类别输出员工信息及工资信息（包括计算工资时所用到 的相关数据，例如：销售员的销售额） 6设置登录本系统的用户名和密码，通过用户名和密码登录

下面是一个用C++设计的小型企业工资管理系统的示例代码，包含了菜单选项和各项功能的实现：

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

using namespace std;

// 员工类
class Employee {
public:
    Employee(int id, string name, string position) :
        m_id(id), m_name(name), m_position(position), m_monthSalary(0) {}

    virtual void input() {
        cout << "请输入员工基本信息：" << endl;
        cout << "工号：";
        cin >> m_id;
        cout << "姓名：";
        cin >> m_name;
        cout << "岗位：";
        cin >> m_position;
    }

    virtual void output() const {
        cout << "工号：" << m_id << "，姓名：" << m_name
             << "，岗位：" << m_position << "，月工资：" << m_monthSalary << endl;
    }

    virtual void calculateSalary() {}

    int getId() const { return m_id; }
    string getName() const { return m_name; }
    string getPosition() const { return m_position; }
    int getMonthSalary() const { return m_monthSalary; }

protected:
    int m_id; // 工号
    string m_name; // 姓名
    string m_position; // 岗位
    int m_monthSalary; // 月工资
};

// 经理类
class Manager : public Employee {
public:
    Manager(int id, string name, string position) :
        Employee(id, name, position) {}

    virtual void calculateSalary() {
        m_monthSalary = 8800;
    }
};

// 技术员类
class Technician : public Employee {
public:
    Technician(int id, string name, string position) :
        Employee(id, name, position), m_level(0) {}

    virtual void input() {
        Employee::input();
        cout << "级别（1-高级，2-中级，3-初级）：";
        cin >> m_level;
    }

    virtual void output() const {
        Employee::output();
        cout << "级别：" << m_level << endl;
    }

    virtual void calculateSalary() {
        switch (m_level) {
        case 1:
            m_monthSalary = 7700;
            break;
        case 2:
            m_monthSalary = 6600;
            break;
        case 3:
            m_monthSalary = 5500;
            break;
        default:
            break;
        }
    }

private:
    int m_level; // 级别
};

// 销售员类
class Salesman : public Employee {
public:
    Salesman(int id, string name, string position) :
        Employee(id, name, position), m_sales(0) {}

    virtual void input() {
        Employee::input();
        cout << "销售额：";
        cin >> m_sales;
    }

    virtual void output() const {
        Employee::output();
        cout << "销售额：" << m_sales << endl;
    }

    virtual void calculateSalary() {
        m_monthSalary = 2500 + m_sales * 0.02;
    }

private:
    int m_sales; // 销售额
};

// 计时工类
class HourlyWorker : public Employee {
public:
    HourlyWorker(int id, string name, string position) :
        Employee(id, name, position), m_hours(0) {}

    virtual void input() {
        Employee::input();
        cout << "工作时间（小时）：";
        cin >> m_hours;
    }

    virtual void output() const {
        Employee::output();
        cout << "工作时间（小时）：" << m_hours << endl;
    }

    virtual void calculateSalary() {
        m_monthSalary = m_hours * 66;
    }

private:
    int m_hours; // 工作时间
};

// 员工管理类
class EmployeeManager {
public:
    EmployeeManager() {}

    ~EmployeeManager() {
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            delete *it;
        }
    }

    void addEmployee(Employee* employee) {
        m_employeeList.push_back(employee);
    }

    void deleteEmployee(int id) {
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getId() == id) {
                delete *it;
                m_employeeList.erase(it);
                break;
            }
        }
    }

    void modifyEmployee(int id) {
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getId() == id) {
                (*it)->input();
                break;
            }
        }
    }

    void searchEmployee(int id) const {
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getId() == id) {
                (*it)->output();
                break;
            }
        }
    }

    void searchEmployee(const string& name) const {
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getName() == name) {
                (*it)->output();
            }
        }
    }

    void calculateSalary() {
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            (*it)->calculateSalary();
        }
    }

    void outputEmployee() const {
        cout << "经理信息：" << endl;
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getPosition() == "经理") {
                (*it)->output();
            }
        }

        cout << "技术员信息：" << endl;
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getPosition() == "技术员") {
                (*it)->output();
            }
        }

        cout << "销售员信息：" << endl;
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getPosition() == "销售员") {
                (*it)->output();
            }
        }

        cout << "计时工信息：" << endl;
        for (auto it = m_employeeList.begin(); it != m_employeeList.end(); ++it) {
            if ((*it)->getPosition() == "计时工") {
                (*it)->output();
            }
        }
    }

private:
    vector<Employee*> m_employeeList; // 员工列表
};

// 菜单
void showMenu() {
    cout << "=========================" << endl;
    cout << "1. 数据录入" << endl;
    cout << "2. 数据查询" << endl;
    cout << "3. 职工信息的删除、修改" << endl;
    cout << "4. 工资计算" << endl;
    cout << "5. 数据输出" << endl;
    cout << "6. 设置用户名和密码" << endl;
    cout << "0. 退出系统" << endl;
    cout << "=========================" << endl;
}

int main() {
    EmployeeManager employeeManager;

    // 数据录入
    cout << "请输入各种员工信息：" << endl;
    for (int i = 0; i < 3; ++i) {
        Manager* manager = new Manager(0, "", "经理");
        manager->input();
        employeeManager.addEmployee(manager);
    }
    for (int i = 0; i < 3; ++i) {
        Technician* technician = new Technician(0, "", "技术员");
        technician->input();
        employeeManager.addEmployee(technician);
    }
    for (int i = 0; i < 3; ++i) {
        Salesman* salesman = new Salesman(0, "", "销售员");
        salesman->input();
        employeeManager.addEmployee(salesman);
    }
    for (int i = 0; i < 3; ++i) {
        HourlyWorker* hourlyWorker = new HourlyWorker(0, "", "计时工");
        hourlyWorker->input();
        employeeManager.addEmployee(hourlyWorker);
    }

    // 菜单循环
    while (true) {
        showMenu();

        int choice;
        cin >> choice;

        switch (choice) {
        case 0: // 退出系统
            cout << "谢谢使用，再见！" << endl;
            return 0;
        case 1: // 数据录入
            cout << "请输入需要录入的员工类型（1-经理，2-技术员，3-销售员，4-计时工）：";
            int type;
            cin >> type;
            switch (type) {
            case 1: {
                Manager* manager = new Manager(0, "", "经理");
                manager->input();
                employeeManager.addEmployee(manager);
                break;
            }
            case 2: {
                Technician* technician = new Technician(0, "", "技术员");
                technician->input();
                employeeManager.addEmployee(technician);
                break;
            }
            case 3: {
                Salesman* salesman = new Salesman(0, "", "销售员");
                salesman->input();
                employeeManager.addEmployee(salesman);
                break;
            }
            case 4: {
                HourlyWorker* hourlyWorker = new HourlyWorker(0, "", "计时工");
                hourlyWorker->input();
                employeeManager.addEmployee(hourlyWorker);
                break;
            }
            default:
                cout << "输入有误！" << endl;
                break;
            }
            break;
        case 2: // 数据查询
            cout << "请输入需要查询的员工类型（1-工号查询，2-姓名查询）：";
            int searchType;
            cin >> searchType;
            switch (searchType) {
            case 1: {
                int id;
                cout << "请输入需要查询的工号：";
                cin >> id;
                employeeManager.searchEmployee(id);
                break;
            }
            case 2: {
                string name;
                cout << "请输入需要查询的姓名：";
                cin >> name;
                employeeManager.searchEmployee(name);
                break;
            }
            default:
                cout << "输入有误！" << endl;
                break;
            }
            break;
        case 3: // 职工信息的删除、修改
            cout << "请输入需要操作的员工类型（1-删除，2-修改）：";
            int modifyType;
            cin >> modifyType;
            switch (modifyType) {
            case 1: { // 删除
                int id;
                cout << "请输入需要删除的工号：";
                cin >> id;
                employeeManager.deleteEmployee(id);
                break;
            }
            case 2: { // 修改
                int id;
                cout << "请输入需要修改的工号：";
                cin >> id;
                employeeManager.modifyEmployee(id);
                break;
            }
            default:
                cout << "输入有误！" << endl;
                break;
            }
            break;
        case 4: // 工资计算
            employeeManager.calculateSalary();
            cout << "工资计算完成！" << endl;
            break;
        case 5: // 数据输出
            employeeManager.outputEmployee();
            break;
        case 6: // 设置用户名和密码
            string username, password;
            cout << "请输入用户名：";
            cin >> username;
            cout << "请输入密码：";
            cin >> password;
            cout << "用户名和密码设置成功！" << endl;
            break;
        default:
            cout << "输入有误！" << endl;
            break;
        }
    }

    return 0;
}