ord">const</span> &amp; x2, Y2 <span class="keyword">const</span> &amp; y2, Z2 <span class="keyword">const</span> &amp; z2,</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;                        X3 <span class="keyword">const</span> &amp; x3, Y3 <span class="keyword">const</span> &amp; y3, Z3 <span class="keyword">const</span> &amp; z3);</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;                        </div>
<div class="line"><a