1.定义virtual base class：people，要求： 数据成员：编号id，姓名name，性别sex, 联系电话tel，邮箱e_mail，出生日期bir，bir是struct结构，包括年月日； 虚函数成员：显示show()，使用恰当格式显示全部数据成员； 2.定义derived class：teacher: public virtual people，要求： 增加数据成员：学位degree，部门dep； 成员函数：显示show()，使用恰当格式显示增加的数据成员； 3.定义derived class：student: public virtual people，要求： 增加数据成员：学号sno，专业major； 成员函数：显示show()，使用恰当格式显示增加的数据成员； 4.定义derived class：course: public teacher，public student，要求： 增加数据成员：课程信息cinfo，cinfo是struct结构，包括课程名称name，课程id，选课学生s[]，任课教师t； 成员函数：显示show()，使用恰当格式显示增加的数据成员；画出5个class的继承派生关系图，使用C++语言设计各个class，在下面拷贝class的代码，并添加必要的注释：

以下是代码实现：

#include <iostream>
#include <string>

using namespace std;

// 定义人类基类
class People {
public:
    // 构造函数
    People(int id, string name, string sex, string tel, string e_mail, int year, int month, int day) {
        this->id = id;
        this->name = name;
        this->sex = sex;
        this->tel = tel;
        this->e_mail = e_mail;
        this->bir.year = year;
        this->bir.month = month;
        this->bir.day = day;
    }
    // 虚函数显示
    virtual void show() {
        cout << "编号：" << id << endl;
        cout << "姓名：" << name << endl;
        cout << "性别：" << sex << endl;
        cout << "联系电话：" << tel << endl;
        cout << "电子邮箱：" << e_mail << endl;
        cout << "出生日期：" << bir.year << "-" << bir.month << "-" << bir.day << endl;
    }

protected:
    // 数据成员
    int id;
    string name;
    string sex;
    string tel;
    string e_mail;
    struct Birthday {
        int year;
        int month;
        int day;
    } bir;
};

// 定义教师派生类
class Teacher : public virtual People {
public:
    // 构造函数
    Teacher(int id, string name, string sex, string tel, string e_mail, int year, int month, int day, string degree, string dep)
        : People(id, name, sex, tel, e_mail, year, month, day), degree(degree), dep(dep) {}

    // 虚函数显示
    virtual void show() {
        People::show(); // 调用基类的show函数
        cout << "学位：" << degree << endl;
        cout << "部门：" << dep << endl;
    }

protected:
    // 增加数据成员
    string degree;
    string dep;
};

// 定义学生派生类
class Student : public virtual People {
public:
    // 构造函数
    Student(int id, string name, string sex, string tel, string e_mail, int year, int month, int day, int sno, string major)
        : People(id, name, sex, tel, e_mail, year, month, day), sno(sno), major(major) {}

    // 虚函数显示
    virtual void show() {
        People::show(); // 调用基类的show函数
        cout << "学号：" << sno << endl;
        cout << "专业：" << major << endl;
    }

protected:
    // 增加数据成员
    int sno;
    string major;
};

// 定义课程派生类
class Course : public Teacher, public Student {
public:
    // 构造函数
    Course(int id, string name, string sex, string tel, string e_mail, int year, int month, int day, string degree, string dep, int sno, string major, string cname, int cid, string tname)
        : People(id, name, sex, tel, e_mail, year, month, day), Teacher(id, name, sex, tel, e_mail, year, month, day, degree, dep), Student(id, name, sex, tel, e_mail, year, month, day, sno, major), cname(cname), cid(cid), tname(tname) {}

    // 虚函数显示
    virtual void show() {
        People::show(); // 调用基类的show函数
        cout << "课程名称：" << cname << endl;
        cout << "课程ID：" << cid << endl;
        cout << "选课学生：";
        for (int i = 0; i < sizeof(s) / sizeof(s[0]); i++) {
            cout << s[i] << " ";
        }
        cout << endl;
        cout << "任课教师：" << tname << endl;
    }

protected:
    // 增加数据成员
    struct CourseInfo {
        string name;
        int id;
        string s[100];
        string tname;
    } cinfo;
    string cname;
    int cid;
    string tname;
};

int main()
{
    People* p1 = new Teacher(1, "张三", "男", "1234567", "zhangsan@qq.com", 1990, 1, 1, "博士", "计算机科学与技术");
    People* p2 = new Student(2, "李四", "女", "2345678", "lisi@qq.com", 2000, 2, 2, 20210001, "计算机科学与技术");
    People* p3 = new Course(3, "王五", "男", "3456789", "wangwu@qq.com", 1980, 3, 3, "硕士", "数学系", 20210001, "计算机科学与技术", "C++语言", 1001, "张三");

    p1->show();
    cout << endl;
    p2->show();
    cout << endl;
    p3->show();
    cout << endl;

    delete p1;
    delete p2;
    delete p3;

    return 0;
}

以下是继承关系图：

        People
           |
     |-------------|
  Teacher       Student
     |-------------|
        Course