title: c recursive binary
body: <p>I understand the &quot;rules&quot; of inserting</p>
  <pre><code>void printTree(BTNode* node) {
      
      if (node == NULL)
          return;
      printTree(node-&gt;left);
      printf(&quot;%c&quot;, node-&gt;item);
      printTree(node-&gt;right);
  
  }
  </code></pre>