Use this shortcode to display a specific post’s comment count. All you have to do is add the post ID.
PHP
Usage: [comments id="1"]
<?php
function comments_shortcode($atts) {
extract( shortcode_atts( array(
'id' => ''
), $atts ) );
$num = 0;
$post_id = $id;
$queried_post = get_post($post_id);
$cc = $queried_post->comment_count;
if( $cc == $num || $cc > 1 ) : $cc = $cc.' Comments';
else : $cc = $cc.' Comment';
endif;
$permalink = get_permalink($post_id);
return '<a href="'. $permalink . '" class="comments_link">' . $cc . '</a>';
}
add_shortcode('comments', 'comments_shortcode');
?>

Comments will be moderated and
rel="nofollow"will be added to all links. You can wrap your coding with[code][/code]to make use of built-in syntax highlighter.