"Usage: client &lt;host&gt;"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
      <span class="keyword">return</span> <span class="number">1</span><span class="special">;</span>
    <span class="special">}</span>

    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_