Linked list

gistfile1.c

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

typedef struct node
{
  int           value;
  struct node*  next;
} node;

void append(struct node** const list, int const val)
{
  assert(list);
  if (!*list)
    {
      *list = malloc(sizeof (struct node));
      **list = (struct node) { val, NULL };
    }
  else
    append(&(*list)->next, val);
}

void print_reverse(struct node const* const list, FILE* const of)
{
  if (!list)
    return;
  print_reverse(list->next, of);
  fprintf(of, "%d%c", list->value, list->next ? ',' : 0);
}

int main(void)
{
  struct node* list = NULL;
  append(&list, 42);
  append(&list, 666);
  append(&list, 9001);
  print_reverse(list, stdout);
}