fier">tmp</span> <span class="special">=</span> <span class="identifier">a</span><span class="special">;</span>
  <span class="keyword">return</span> <span class="identifier">tmp</span><span class="special">-=</span> <span class="identifier">n</span><span class="special">;</span>
<span class="special">}</span>
</pre>
                </td>
<td>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">b</span> <span class="special">-