ss=special>;</span>
<span class=special>};</span>

<span class=keyword>unsigned</span> <span class=keyword>long</span> <span class=identifier>area</span><span class=special>(</span><span class=keyword>const</span> <span class=identifier>rectangle</span><span class=special>&amp;</span> <span class=identifier>r</span><span class=special>)</span>
<span class=special>{</span>
  <span class=keyword>return</span> <span class=special>(</span><span class=keyword>unsigned</span> <span class=keyword>long</span><span 