p&gt;::norm</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keywordflow">return</span> std::sqrt((<span class="keywordtype">double</span>)x_*x_ + (<span class="keywordtype">double</span>)y_*y_);</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;}</div>
<div class="line