n> <span class="identifier">b</span> <span class="special">=</span> <span class="number">2</span><span class="special">;</span>
   <span class="comment">// There are 113-bits of precision:</span>
   <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span><span class="special">&lt;</span><span class="identifier">fl