1#include <stdio.h>
2#include <stdlib.h>
3#include "bin-trees.h"
4
5static void
6real_inorder (tree_ptr root)
7{
8  if (root == NULL)
9    return;
10
11  real_inorder (root->left);
12  printf ("%d ", root->data);
13  real_inorder (root->right);
14}
15
16void
17in_order_traverse (tree_ptr root)
18{
19  printf ("in-order traversal, with recursion: \n");
20  real_inorder (root);
21  printf ("\n");
22}
23