a
 balance = 0;</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="k">virtual</span> <span class="kt">void</span> <span class="nf">print</span><span class="p">()</span> <span class="p">;</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-6">&#182;</a>               </div>               <