#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *f;
char ime[10], klas[3], izbor;
float mat, bel, inf, uspeh;


while (true) {
f=fopen("c:/uspeh.txt","a");
cout<<"Ime na u4enik: "; cin>>ime;
cout<<"Paralelka: "; cin>>klas;
cout<<"Matematika: "; cin>>mat;
cout<<"BEL: "; cin>>bel;
cout<<"Informatika: "; cin>>inf;
uspeh=(mat+bel+inf)/3;
fprintf(f, "%s ot %s klas ima uspeh %4.2f\n",ime , klas, uspeh);
fclose(f);
printf("Iskate li da vavedete o6te 1 u4enik?  (1=y/2=n): ");
cin>>izbor;
if (izbor=='n') exit(0);
}

    return 0;
}