OR-tut13-zad2_1

#include <stdio.h>

struct Student
{ char prezime[15];
char ime[10];
int br_brod1, br_bod2;
};

int main () {
    FILE *ulaz=fopen("ispiti.txt","r");
    if (ulaz==NULL) {
        printf("Greska prilikom otvaranja datoteke.");
        exit(1);
    }
    FILE *izlaz=fopen("usmeni.txt");
    if (izlaz==NULL) {
        printf("Greska prilikom otvaranja izlazne datoteke.");
        fclose(ulaz);
        exit(1);
    }

    int i=0;
    struct Student niz[50], temp;
    while (fscanf(ulaz,"%15s %10s %d %d",&niz[i].prezime,&niz[i].ime, &niz[i].br_brod1,&niz[i].br_bod2)!=EOF && i<50) i++;

    int m,n;
    for (m=0; m<i-1; m++) {
        for (n=m+1; n<i; n++) {
                if ((niz[m].br_bod1+niz[m].br_bod2)<(niz[n].br_bod1+niz[n].br_bod2)) {
                        temp =niz[m];
                niz[m]=niz[n];
                niz[n]=temp;
                }}
    }
    fclose(ulaz);
    int j=0;
    for (j=0; j<i; j++) {
            if ((niz[i].br_brod1+niz[i].br_bod2)>20)
            fprintf(izlaz,"%15s %10s %d",niz[i].ime,niz[i].prezime,(niz[i].br_brod1+niz[i].br_bod2));
    }
    fclose(ulaz);
    fclose(izla);
    return 0;
}