Shortcode to show current page title

function title_func($atts) {
	extract( shortcode_atts( array(
		'num_words' => 20,
	), $atts ) );
	//$title = get_the_title(get_the_ID());

	$title = substr(get_the_title(), 0, $num_words );
	$length = strlen(get_the_title());

	if ($length > $num_words) {
		$more = "…";
	} else {
		$more = "";
	}

	//$link = get_permalink(get_the_ID());
	//return '<a href="' . $link . '">' . wp_trim_words($title, $num_words) . '</a>';
	return $title . $more ;
}

add_shortcode('title','title_func');