#include<iostream>
#include<cstring>
#include<fstream>
#include<iomanip>
#include<conio.h>
#include<windows.h>
void gotoxy(int x,int y);
using namespace std;
static int n=0;
class person{
protected:
int num;
char name[10];
char pro[10];
int clas;
char su1[5];
char su2[5];
float sc1;
float sc2;
char grad[10];
person *next;
public:
person();
~person();
friend class User;
};
class teacher:virtual public person{
public:
teacher(int num,char name[10],char pro[10],int clas,char su1[5],char su2[5],float sc1,float sc2);
teacher();
~teacher();
void grade(char grad1[10]);
protected:
char grad[10];
};
class student:public person{
public:
student();
~student();
};
class User{
public:
void menu1();
void menu2();
void write();
void read();
void print();
void insert();
void find();
void change();
void delet();
void sort();
void MENU();
void aversort();
void cread_head();
void user_choose();
private:
person *head;
};
struct login
