t">
          gr_test_output.txt</a>,
          the output file;
        </li>
        <li>
          <a href = "gr_test01.m">gr_test01.m</a>,
          tests GR_ADJACENCY_LIST.
        </li>
        <li>
          <a href = "gr_test02.m">gr_test02.m</a>,
          tests GR_ADJACENCY_MATRIX.
        </li>
        <li>
          <a href = "gr_test03.m">gr_test03.m</a>,
          tests GR_ADJACENCY_POINTER.
        </li>
        <li>
          <a href = "gr_test04.m">gr_test04.m</a>,
          tests GR_ADJACE