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

# define car(doublet) ((doublet)->car)
# define cdr(doublet) ((doublet)->cdr)
# define nil NULL

typedef struct Doublet {void * car; struct Doublet * cdr;} * list;


list cons(void * element, const list L);

list push(void * elt, list & L);

int main(void)
  {
  int i = 5;
//  blabla
//  blabla
//  blabla
  }

list cons(void * element, const list L)
   {
   list maListe = malloc(sizeof(struct Doublet));
   car(maListe) = element;
   cdr(maListe) = L;
   return maListe;
   }

list push(void * elt, list & L) {return L = cons(elt, L) ;}