定义一个学生类：成员--＞姓名、年龄、成绩以及相关函数定义一个老师类：成员--＞年龄、职称以及相关函数由学生类和老师类共同派生出研究生类：成员--＞性别实例化就研究生类的对象，并输出该对象的所有

#include <iostream>

using namespace std;
class Student
{
protected:
    string name;
    int age;
    int score;
public:
    Student(){}
    Student(string name, int age, int score)
    {
        this->name = name;
        this->age = age;
        this->score = score;
    }

    void show()
    {
        cout<<"student message>>>"<<this->name<<'\t'<<this->age<<'\t'<<this->score<<endl;
    }
};

class Teacher
{
protected:
    int age;
    string job;
public:
    Teacher(){}
    Teacher(int age, string job)
    {
        this->age = age;
        this->job = job;
    }

    void show()
    {
        cout<<"teacher message>>>"<<this->age<<'\t'<<this->job<<endl;
    }
};

class Graduate:public Student, public Teacher
{
protected:
    string sex;
public:
    Graduate(){}
    Graduate(string name, int age, int score, int tage, string job, string se):Student(name,age,score),Teacher(tage,job),sex(se){}
    void show()
    {
       cout<<"姓名："<<this->name<<" 年龄："<<Student::age<<" 成绩："<<this->score<<" 性别："<<this->sex<<" 指导教师年龄："<<Teacher::age<<" 职称："<<this->job<<endl;
    }
};
int main()
{
    Graduate gra("张三",22,98,45,"教授","男");
    gra.show();
    return 0;
}

 结果：

姓名：张三 年龄：22 成绩：98 性别：男 指导教师年龄：45 职称：教授