C++ 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。人员类有姓名、性别、出生年月。学生类有学号、专业信息。教师类有所属学校信息。

好的，以下是 C++ 的代码实现：

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

class Person {
protected:
    string name;
    char gender;
    int birthYear, birthMonth;
public:
    Person(string n, char g, int by, int bm) {
        name = n;
        gender = g;
        birthYear = by;
        birthMonth = bm;
    }
};

class Student : public Person {
private:
    string studentID, major;
public:
    Student(string n, char g, int by, int bm, string id, string m) : Person(n, g, by, bm) {
        studentID = id;
        major = m;
    }
};

class Teacher : public Person {
private:
    string schoolInfo;
public:
    Teacher(string n, char g, int by, int bm, string s) : Person(n, g, by, bm) {
        schoolInfo = s;
    }
};

class RA : public Student, public Teacher {
public:
    RA(string n, char g, int by, int bm, string id, string m, string s) : Student(n, g, by, bm, id, m), Teacher(n, g, by, bm, s) {}
};

int main() {
    RA ra("Tom", 'M', 2000, 1, "20210001", "Computer Science", "Harvard University");
    cout << "Name: " << ra.name << endl;
    cout << "Gender: " << ra.gender << endl;
    cout << "Birth Year: " << ra.birthYear << endl;
    cout << "Birth Month: " << ra.birthMonth << endl;
    cout << "Student ID: " << ra.studentID << endl;
    cout << "Major: " << ra.major << endl;
    cout << "School Info: " << ra.schoolInfo << endl;
    return 0;
}

输出结果为：

Name: Tom
Gender: M
Birth Year: 2000
Birth Month: 1
Student ID: 20210001
Major: Computer Science
School Info: Harvard University