how to get link for user's profile page?

I need to get user profile link on category pages (category.php) and single page (content.php)
I need to put “user(author) profile page link” next author name. it’s called “visit this author profile”

I have tried several but none of them are working.

//echo “aa=”. bp_core_get_user_domain( ‘ID’ ).”<br/>”;
//echo “bb=”. bp_core_get_userlink( ‘ID’ ).”<br/>”;

//echo “aa=”. bp_core_get_user_domain( $user_id ).”<br/>”;
//echo “cc=”. bp_core_get_user_domain( “admin” ).”<br/>”;
//echo “bb=”. bp_core_get_userlink( $user_id ).”<br/>”;
//echo “dd=”. bp_member_permalink().”<br/>”;
;

any advice?