lass="special">.</span><span class="identifier">erase</span><span class="special">();</span>
      <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">is</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]);</span>
      <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">s</span>