#include <iostream>
#include <string>
#include "student.h"
using namespace std;
class cxiaoxuesheng:public cstudent
{
public:
int yuwen_score;
int shuxue_score;
int set_music(int a)
{
music_score=a;
return music_score;
}
protected:
int music_score;
};
class czhongxuesheng :public cxiaoxuesheng
{public:
int wuli_score;
int huaxue_score;
};