5.18

#include<iostream>

using namespace std;

#include<string>

class student {

public:

    void shangke();

protected:

    string name;

    int bj;

    int id;

};

class teacher {

public:

    void jiaoke();

protected:

    int ID;

    int gz;

};

class zhujiao :public student, public teacher {

};

int main()

{

    system("pause");

    return 0;

}