Programme ec c

#include <stdio.h>

#include <string.h>

int main (void)
{
  int base, n, q, r, i;
  char resultat[20];
  q = 1;
  i = 0;

  printf ("Entrez un numé entier : ");
  scanf ("%d", &n);
  printf ("Entrez la base de conversion : ");
  scanf ("%d", &base);
  printf ("%d en base %d = ", n, base);
  while (q != 0){
    q = n / base;
    r = n % base;
    n = q;
    if (r > 10)
      resultat[i++] = r + 55;
      else
      resultat[i++] = r + '0';
  }
  resultat[i] = '\0';
  for (i = strlen (resultat); i >= 0; --i)
    printf ("%c", resultat[i]);
    printf ("\n");
  return 0;
}