--------------------------------------------</span>
      <span class="k">do </span><span class="n">i</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span> <span class="n">n</span>
         <span class="n">i1</span> <span class="o">=</span> <span class="n">jptr</span><span class="p">(</span><span class="n">i</span><span class="p">)</span>
         <span class="n">i2</span> <span class="o">=</span> <span class="n">jptr</span><span class="p">(</span><span class="n">i</span> <span c