lass="special">&lt;</span><span class="identifier">Real</span><span class="special">&gt;());</span>
  <span class="identifier">Complex</span> <span class="identifier">res</span> <span class="special">=</span> <span class="identifier">num</span><span class="special">/</span><span class="identifier">den</span><span class="special">;</span>
  <span class="keyword">return</span> <span class="identifier">res</span><span class="special">;</span>
<span class="special">};</span>

<span class="identifier">boost</spa