struktura kruznice

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

struct Kruznica
{
    int x;
    int y;
    int r;
};

struct Kruznica* funkcija(struct Kruznica niz[], int* vel, int br)
{
    int i,j;
 for(i=0; i<*vel; i++)
 {
     if(niz[i].r*niz[i].r*3.14 <br)
     {
         for(j=i; j<(*vel)-1; j++)
            niz[j]=niz[j+1];
         i--;
         (*vel)--;
     }
 }
  return niz;
}
int main()
{

   struct Kruznica niz[4]={{5,5,5}, {2,2,2}, {6,4,7}, {1,1,1}};

   struct Kruznica* p;
   int vel=4,i;
   p=funkcija(niz, &vel, 6);
   for(i=0; i<vel; i++)
   printf("%d ", niz[i].r);
}