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

struct{
   char ime[30+1];
   char prezime[50+1];
   long matbr;
   float placa;
   char oznaka;
} place;

int main(){
   FILE *fin;
   char buffer[32];


   if ((fin = fopen("place.dat", "a+b"))==NULL) {
      printf("Greska, ne mogu otvoriti datoteku\n");
      getche();
      return 1;
   }

   while(1){
      fseek(fin, 0, SEEK_END);
      printf("Ime: ");
      memset(place.ime, 0, sizeof(place.ime));
      fgets(place.ime, sizeof(place.ime), stdin);
      
      printf("Prezime: ");
      fgets(place.prezime, sizeof(place.prezime), stdin);
      
      do{
      printf("Matbr (0 za kraj): ");
      fgets(buffer, sizeof(buffer), stdin);
      place.matbr=atol(buffer);
      } while(place.matbr<0);
      if(place.matbr==0) break;
      
      do{
      printf("Placa: ");
      fgets(buffer, sizeof(buffer), stdin);
      place.placa=atof(buffer);
      } while(place.placa>=10000);
      
      printf("Oznaka: ");
      place.oznaka=getchar();

      if(fwrite(&place, sizeof(place), 1, fin)==1){
          printf("Podaci su uspjesno pohranjeni!\n\n");
      } else {
          printf("Greska pri pohrani podataka!\n\n");
      }

   }

   fclose(fin);

   printf("Kraj unosa!");

   getche();
   return 0;
}