01)
<code>wp_list_comments()</code>



0)
.commentlist li .commentnumber {
float:right;
color:#999999;
font-size:3em;
margin:0;
padding:0 .5em .5em 0;
clear:right;
}

.commentlist li li .commentnumber {
font-size:1.7em;
}

.commentlist li li li .commentnumber {
font-size:1.3 em;
}


1)
<?php wp_list_comments('callback=gtcn_basic_callback'); ?>


2)
<?php wp_list_comments( array( 'callback' => 'twentytwelve_comment', 'style' => 'ol' ) ); ?>


3)
<?php
$comment_number = gtcn_comment_numbering($comment->comment_ID, $args);
echo $comment_number;
?>