int main(int argc, char ** argv){
  FILE *fd;
  fd = fopen("data/couleurs.ppm","r");

  int * const i = NULL, * const j = NULL, * const k = NULL;
  pixval * const p = NULL;

  ppm_readppminit(fd, i, j, p, k);


  printf("\n\n");
  return EXIT_SUCCESS;
}