ss="identifier">x</span><span class="special">)</span> <span class="special">{</span>
    <span class="keyword">double</span> <span class="identifier">t</span> <span class="special">=</span> <span class="identifier">exp</span><span class="special">(-</span><span class="identifier">x</span><span class="special">);</span>
    <span class="keyword">if</span><span class="special">(</span><span class="identifier">t</span> <span class="special">==</span> <span class="number">0</span><span class="special">)</span>