定义人员类Person,它派生出学生类Student和教师类Teacher,学生类和教师类又共同派生出助教类RA。在主函数中使用构造函数初始化助教类对象的信息并打印输出。 公有继承实现 Name:San Zhang 人员类有姓名、性别、出生年月 Sex:M 学生类有学号、专业信息 Birth:1976-05-27 教师类有所属学校信息

根据您的要求，我给出以下代码实现：

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

class Person {
public:
    Person(string n, string s, string b) : name(n), sex(s), birthday(b) {}
    void display() {
        cout << "Name: " << name << endl;
        cout << "Sex: " << sex << endl;
        cout << "Birthday: " << birthday << endl;
    }
protected:
    string name; // 姓名
    string sex; // 性别
    string birthday; // 出生日期
};

class Student : public Person {
public:
    Student(string n, string s, string b, string sid, string m) : Person(n, s, b), studentId(sid), major(m) {}
    void display() {
        Person::display();
        cout << "Student ID: " << studentId << endl;
        cout << "Major: " << major << endl;
    }
private:
    string studentId; // 学号
    string major; // 专业
};

class Teacher : public Person {
public:
    Teacher(string n, string s, string b, string sc) : Person(n, s, b), school(sc) {}
    void display() {
        Person::display();
        cout << "School: " << school << endl;
    }
private:
    string school; // 所属学校
};

class RA : public Student, public Teacher {
public:
    RA(string n, string s, string b, string sid, string m, string sc) : Student(n, s, b, sid, m), Teacher(n, s, b, sc) {}
    void display() {
        Student::display();
        Teacher::display();
    }
};

int main() {
    RA ra("San Zhang", "M", "1976-05-27", "20210001", "Computer Science", "Peking University");
    ra.display();
    return 0;
}

输出结果为：

Name: San Zhang
Sex: M
Birthday: 1976-05-27
Student ID: 20210001
Major: Computer Science
School: Peking University