OR-2007-Datoteka

#include <stdio.h>
#include <string.h>

struct student {
char ime[10];
char prezime[15];
int predmet;
int ocjena;
};

int main () {

    FILE *ulaz=fopen("studenti.txt","r");
    if (ulaz==NULL) {
        printf("Greska");
        exit(1);
    }
    FILE *izlaz=fopen("ispiti.txt","w");
    if (izlaz==NULL) {
        printf("Greska.");
        fclose(ulaz);
        exit(1);
    }
    int i=0;
   struct studenti[100];
   while (fscanf(ulaz,"%10s%15s%d%d",&studenti[i].ime, &studenti[i].prezime, &studenti[i].predmet,&studenti[i].ocjena)!=EOF && i<100)
    i++;
   int j=0,k,br_studenata=0;
   float suma=0;
   for (k=1; k<=10; k++) {
   for (j=0; j<i; j++) {
        if (k==studenti[j].predmet) {
           br_studenata++;
           suma+=studenti[j].ocjena;
        }

   fprintf(izlaz,"%d %6.2d",k,suma/br_studenata);
   }}
   fclose(ulaz);
   fclose(izlaz);
   return 0;
}