n class="lineno">  201</span>  <span class="comment">// (reverses the signs of x and y)</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>  <a class="code hl_class" href="class_vec.html">Vec</a>&amp; negative() {</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>    x = -x;</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>    y = -y;</div>
<div class="line"><a id="l00205" name="l00