identifier">ostream</span>
<span class="special">{</span>
<span class="keyword">protected</span><span class="special">:</span>
    <span class="identifier">fdoutbuf</span> <span class="identifier">buf</span><span class="special">;</span>
<span class="keyword">public</span><span class="special">:</span>
    <span class="keyword">explicit</span> <span class="identifier">fdostream</span><span class="special">(</span> <span class="keyword">int</span> <span class="identifier">fd</span> <span class="special">)</s