ouble</span> <span class="identifier">y</span><span class="special">);</span>
</pre>
<p>
      As <code class="computeroutput"><span class="identifier">nextafter</span></code>, but with <span class="emphasis"><em>y</em></span>
      always expressed as a <code class="computeroutput"><span class="keyword">long</span> <span class="keyword">double</span></code>.
    </p>
<pre class="programlisting"><span class="keyword">double</span> <span class="identifier">round</span><span class="special">(</span><span clas