passing uri segment

class Welcome extends Controller {
 
	function Welcome()
	{
	parent::Controller();
	}
 
	function index()
	{
        $data['title'] = "Welcome to my site";
       	$data['heading'] = "This is heading";
	$this->load->view('welcome_message',$data);
	}
 
	function one()
	{
        $data['title'] = "Welcome to my site";
       	$data['heading'] = "This is heading page one";
	$this->load->view('one',$data);
	}
}