c++ 设计一个虚基类Person包含姓名和年龄私有数据成员以及相关的成员函数；由它派生出领导类Leader包含职务和部门私有数据成员以及相关的成员函数；再由Person派生出工程师类Engineer包含职务和专业私有数据成员以及相关的成员函数；再由Leader和Engineer类派生出主任工程师类Chairman。并采用相关数据进行测试。

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

class Person {
protected:
    string name;
    int age;
public:
    Person(string n, int a): name(n), age(a) {}
    virtual void showInfo() {
        cout << "Name: " << name << endl;
        cout << "Age: " << age << endl;
    }
};

class Leader: virtual public Person {
protected:
    string position;
    string department;
public:
    Leader(string n, int a, string p, string d): Person(n, a), position(p), department(d) {}
    virtual void showInfo() {
        Person::showInfo();
        cout << "Position: " << position << endl;
        cout << "Department: " << department << endl;
    }
};

class Engineer: virtual public Person {
protected:
    string job;
    string major;
public:
    Engineer(string n, int a, string j, string m): Person(n, a), job(j), major(m) {}
    virtual void showInfo() {
        Person::showInfo();
        cout << "Job: " << job << endl;
        cout << "Major: " << major << endl;
    }
};

class Chairman: public Leader, public Engineer {
public:
    Chairman(string n, int a, string p, string d, string j, string m): Person(n, a), Leader(n, a, p, d), Engineer(n, a, j, m) {}
    virtual void showInfo() {
        Person::showInfo();
        Leader::showInfo();
        Engineer::showInfo();
    }
};

int main() {
    Chairman c("Tom", 40, "Chairman", "Engineering Department", "Chief Engineer", "Mechanical Engineering");
    c.showInfo();
    return 0;
}
``