#include<stdio.h>
#include<iostream.h>

FILE *fp;
int i;
char ch;

struct uch {
 char klas[3];
 int num;
 int bel;
 int mat;
 int ae;
 float uspeh;
}x;


void main (){

//zapis na dannite vyv fajla s dobavqne

fp=fopen("uchenik.dat","ab");

pak:
cout<<"paralelka: ";
cin>>x.klas;
cout<<"nomer v klasa: ";
cin>>x.num;
cout<<"ocenka BEL: ";
cin>>x.bel;
cout<<"ocenka Matematika: ";
cin>>x.mat;
cout<<"ocenka English: ";
cin>>x.ae;
x.uspeh=(float) (x.bel+x.mat+x.ae)/3;

fwrite(&x,sizeof(x),1,fp);
cout<<"o6te u4enici? (y/n)";
cin>>ch;
if (ch=='y') goto pak;

fclose(fp);


//4etene na dannite ot fajla
fp=fopen("uchenik.dat","rb");

do {
 fread(&x,sizeof(x),1,fp);
  if (!feof(fp)) {
   cout<<x.klas<<endl;
   cout<<x.num<<endl;
   cout<<x.uspeh<<endl;
  }
} while (!feof(fp));

fclose(fp);

}