#include <stdio.h>

struct entry {
  int value;
  struct entry *next;
};

static void out(struct entry *e) {
  if (e->next != NULL) out(e->next);
  printf("%d\n", e->value);
}

int main(void) {
  struct entry a = {1, NULL}, b = {2, &a}, c = {3, &b}, *head = &c;
  out(head);
  return 0;
}