lineno">  111</span>                integral = integral + 0.5*(fold+fnew)*dt</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>                t = t - dt</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>                fold = fnew</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>                <span class="keywordflow">if</span> (t &lt; 0) stop</div>
<div class="line"><a id="l00115" nam