#! /usr/bin/perl -w
use strict;

my $act = 1;

for my $f (@ARGV) {
    if($f =~ /^-/) {
	if($f eq '-n') {
	    $act = 0;
	} else {
	    die "$0: unknown option: $f\n";
	}
	next;
    }
    my $t = $f;
    $t =~ s/[_ ]+/ /g;
    $t =~ s/(?!(?<=\.)[A-Za-z0-9]+$)\b[a-z]/\U$&\E/g;
    print "$f -> $t\n";
    if($act) {
	(rename $f, $t) or die "$0: $f -> $t: $!\n";
    }
}