read the strings. It is required
        to be an input iterator. Usually the default is used. The public interface
        of the class consists of a single constructor only:
      </p>
<pre class="programlisting"><span class="identifier">nonfinite_num_get</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
</pre>
<p>
        The flags argument is discussed belo