"p">.</span><span class="mi">7</span><span class="p">)</span>
<span class="w">               </span><span class="k">STOP</span>
<span class="k">            ENDIF</span>
<span class="k"> </span><span class="mi">80</span><span class="w">         </span><span class="n">xprev</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">X</span><span class="p">(</span><span class="n">i</span><span class="p">)</span>
<span class="w">            </span><span class="n">rprev</span><