用C++写出公司人事管理系统中的员工类employee：protected数据成员包括：个人编号individualEmpNo、姓名name、级别grade、月薪accumPay；public成员函数包括：设置姓名SetName(char *)、升级promote(int)、设置月薪SetAccumPay (float pa)、获取个人编号GetindividualEmpNo()、获取姓名GetName()、获取级别Getgrade()、获取月薪GetAccumPay()、计算薪资pay()、显示人员信息showInfo()。 公司员工分为：技术人员technician、销售人员salesman、管理人员manager、销售经理salesmanager。

下面是用C++编写的员工类employee以及其派生类的代码：

#include <iostream>
#include <cstring>
using namespace std;

class employee {
protected:
    int individualEmpNo; // 个人编号
    char name[20]; // 姓名
    int grade; // 级别
    float accumPay; // 月薪
public:
    void SetName(char *n) {
        strcpy(name, n);
    }
    void promote(int g) {
        grade += g;
    }
    void SetAccumPay(float pa) {
        accumPay = pa;
    }
    int GetindividualEmpNo() {
        return individualEmpNo;
    }
    char* GetName() {
        return name;
    }
    int Getgrade() {
        return grade;
    }
    float GetAccumPay() {
        return accumPay;
    }
    virtual float pay() { // 计算薪资
        return accumPay;
    }
    virtual void showInfo() { // 显示人员信息
        cout << "个人编号：" << individualEmpNo << endl;
        cout << "姓名：" << name << endl;
        cout << "级别：" << grade << endl;
        cout << "月薪：" << accumPay << endl;
    }
};

class technician : public employee {
public:
    technician(int no) {
        individualEmpNo = no;
        grade = 1;
        accumPay = 2000;
    }
    float pay() {
        return accumPay;
    }
    void showInfo() {
        cout << "技术人员信息：" << endl;
        employee::showInfo();
    }
};

class salesman : public employee {
protected:
    float commission; // 销售提成比例
public:
    salesman(int no) {
        individualEmpNo = no;
        grade = 1;
        accumPay = 2000;
        commission = 0.05;
    }
    float pay() {
        return accumPay + commission * accumPay;
    }
    void showInfo() {
        cout << "销售人员信息：" << endl;
        employee::showInfo();
        cout << "销售提成比例：" << commission << endl;
    }
};

class manager : public employee {
protected:
    float bonus; // 绩效奖金
public:
    manager(int no) {
        individualEmpNo = no;
        grade = 2;
        accumPay = 4000;
        bonus = 1000;
    }
    float pay() {
        return accumPay + bonus;
    }
    void showInfo() {
        cout << "管理人员信息：" << endl;
        employee::showInfo();
        cout << "绩效奖金：" << bonus << endl;
    }
};

class salesmanager : public salesman, public manager {
public:
    salesmanager(int no) : salesman(no), manager(no) {
        individualEmpNo = no;
        grade = 3;
        accumPay = 5000;
        commission = 0.1;
        bonus = 2000;
    }
    float pay() {
        return accumPay + commission * accumPay + bonus;
    }
    void showInfo() {
        cout << "销售经理信息：" << endl;
        employee::showInfo();
        cout << "销售提成比例：" << commission << endl;
        cout << "绩效奖金：" << bonus << endl;
    }
};

int main() {
    technician t(1001);
    t.SetName("张三");
    t.promote(2);
    cout << "姓名：" << t.GetName() << "，薪资：" << t.pay() << endl;
    t.showInfo();

    salesman s(2001);
    s.SetName("李四");
    s.promote(3);
    cout << "姓名：" << s.GetName() << "，薪资：" << s.pay() << endl;
    s.showInfo();

    manager m(3001);
    m.SetName("王五");
    m.promote(4);
    cout << "姓名：" << m.GetName() << "，薪资：" << m.pay() << endl;
    m.showInfo();

    salesmanager sm(4001);
    sm.SetName("赵六");
    sm.promote(5);
    cout << "姓名：" << sm.GetName() << "，薪资：" << sm.pay() << endl;
    sm.showInfo();

    return 0;
}

在主函数中，我们创建了不同类型的员工对象，并对其进行了姓名、级别、月薪等属性的设置，同时调用了计算薪资和显示人员信息的函数。注意到销售经理类salesmanager继承了salesman和manager两个类，因此需要在构造函数中分别调用它们的构造函数来初始化数据成员。