设计一个员工类CEmployee，其结构如下私有数据成员No (工号)，Name (姓名)，Age (年龄)，Salary (薪资); 重载构造函数，实现对类实例对象的带参数初始化和无参数初始化; 公有成员函数SetData ();实现键盘随机输入对数据成员赋值; 公有成员函数Display();实现屏幕输出对数据成员; 在main0中定义对象，给出成员函数调用实例。在此基础上，派生出类经理类CManager和工程师类CEngineer，假定经理需比员工额外考虑行政级别，工程师额外考虑专业和学位

CEmployee类的定义如下：

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

class CEmployee {
private:
    int No;
    string Name;
    int Age;
    double Salary;
public:
    CEmployee() : No(0), Name(""), Age(0), Salary(0.0) { }
    CEmployee(int no, string name, int age, double salary) : No(no), Name(name), Age(age), Salary(salary) { }
    void SetData();
    void Display();
};

void CEmployee::SetData() {
    cout << "请输入工号：";
    cin >> No;
    cout << "请输入姓名：";
    cin >> Name;
    cout << "请输入年龄：";
    cin >> Age;
    cout << "请输入薪资：";
    cin >> Salary;
}

void CEmployee::Display() {
    cout << "工号：" << No << endl;
    cout << "姓名：" << Name << endl;
    cout << "年龄：" << Age << endl;
    cout << "薪资：" << Salary << endl;
}

CManager类的定义如下：

#include<iostream>
#include<string>
#include"CEmployee.h"

using namespace std;

class CManager : public CEmployee {
private:
    string Department;
    int Level;
public:
    CManager() : Department(""), Level(0) { }
    CManager(int no, string name, int age, double salary, string department, int level) : CEmployee(no, name, age, salary), Department(department), Level(level) { }
    void SetData();
    void Display();
};

void CManager::SetData() {
    CEmployee::SetData();
    cout << "请输入部门：";
    cin >> Department;
    cout << "请输入行政级别：";
    cin >> Level;
}

void CManager::Display() {
    CEmployee::Display();
    cout << "部门：" << Department << endl;
    cout << "行政级别：" << Level << endl;
}

CEngineer类的定义如下：

#include<iostream>
#include<string>
#include"CEmployee.h"

using namespace std;

class CEngineer : public CEmployee {
private:
    string Speciality;
    string Degree;
public:
    CEngineer() : Speciality(""), Degree("") { }
    CEngineer(int no, string name, int age, double salary, string speciality, string degree) : CEmployee(no, name, age, salary), Speciality(speciality), Degree(degree) { }
    void SetData();
    void Display();
};

void CEngineer::SetData() {
    CEmployee::SetData();
    cout << "请输入专业：";
    cin >> Speciality;
    cout << "请输入学位：";
    cin >> Degree;
}

void CEngineer::Display() {
    CEmployee::Display();
    cout << "专业：" << Speciality << endl;
    cout << "学位：" << Degree << endl;
}

在主函数中，可以这样定义对象并调用成员函数：

#include<iostream>
#include"CEmployee.h"
#include"CManager.h"
#include"CEngineer.h"

using namespace std;

int main() {
    CEmployee emp1(1001, "张三", 25, 5000);
    cout << "员工1的信息：" << endl;
    emp1.Display();
    cout << endl;

    CManager mgr1;
    mgr1.SetData();
    cout << "经理1的信息：" << endl;
    mgr1.Display();
    cout << endl;

    CEngineer eng1;
    eng1.SetData();
    cout << "工程师1的信息：" << endl;
    eng1.Display();
    cout << endl;

    return 0;
}