Syntax error, unexpected 'public' (T_PUBLIC)

Hy

I hope that I'm opening this topic in the correct section.

I started to study CI_tutorial and now i stopped from many hours by a problem about a news_model. 
When run the tutorial's example get the error: 


A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\httpg\application\models\news_model.php:10)
Filename: core/Common.php
Line Number: 570
Backtrace:

A PHP Error was encountered
Severity: Parsing Error
Message: syntax error, unexpected 'public' (T_PUBLIC)
Filename: models/news_model.php
Line Number: 10
Backtrace:

This is the code of news_model.php
Tahnk you for help!
Luigi


<?php

class News_model extends CI_Model 

{

        public function __construct()

        {

                $this->load->database();

        }

}



public function get_news($slug = FALSE)

{

        if ($slug === FALSE)                                            

        {

                $query = $this->db->get('news');                        

                return $query->result_array();                          

        }



        $query = $this->db->get_where('news', array('slug' => $slug));

        return $query->row_array();
}