rn</span> <span class="keyword">true</span><span class="special">;</span>
<span class="special">}</span>
<span class="keyword">void</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
    <span class="keyword">int</span> <span class="identifier">tok</span> <span class="special">=</span> <span class="identifier">EOF</span><span class="special">;</span>
    <span class="keyword">do</span> <span class="special">{</span>
        <span class="identifier">tok<