>cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Fraction of bulbs that will last at least (&gt;) "</span> <span class="comment">// P(X &gt; 1000)</span>
  <span class="special">&lt;&lt;</span> <span class="identifier">expected_life</span> <span class="special">&lt;&lt;</span> <span class="string">" is "</span><span class="special">&lt;&lt;</span> <span class="identifier">cdf</span><span class="special">(</span><span class="identifier">complement</span><span class="special">(</span><