h.
    </p>

    <p>
      The input from the user includes:
      <ul>
        <li>
          <b>NODE_XY(1:2,1:NODE_NUM)</b>, a list of the coordinates of nodes;
        </li>
        <li>
          <b>ELEMENT_NODE(1:4,1:ELEMENT_NUM)</b>, a list of the nodes that
          make up each element in the mesh;
        </li>
        <li>
          <b>VALUE(1:TRIANGLE_NUM)</b>, the value associated with each element;
        </li>
      </ul>
    </p>

    <h3 align = "center">
      Usage:
    </h3>

    <p>
  