struktura studenti ispit

#include <stdio.h>
#include <stdlib.h>

struct Student
{
    char ime[10], prezime[10];
    int ocjene[10];
};

void funk (struct Student* niz, int vel, float* a, float* b, float* c)
{
    int i=0, j=0, br1=0, br2=0, br3=0;
    float s1=0, s2=0, s3=0;

    for (i=0; i<vel; i++)
    {
        for (j=0; j<vel; j++)
        {
            s+=niz[i].student[j];
            s/=10;
        }
        if (s<8)
        {
            s1+=s;
            br1++;
        }
        else if (s>8 && s<9)
        {
            s2+=s;
            br2++;
        }
        else (s>9)
        {
            s3+=s;
            br3++;
        }
    }
    *a=s1/br1;
    *b=s2/br2;
    *c=s3/br3;
}