n><span class="p">(</span><span class="n">curNode</span><span class="o">==</span><span class="n">NULL</span><span class="p">)</span>
<span class="w">        </span><span class="n">curNode</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">BinaryNode</span><span class="p">(</span><span class="n">x</span><span class="p">,</span><span class="n">NULL</span><span class="p">,</span><span class="n">NULL</span><span class="