#!perl

use strict;
use warnings;
use open qw( :encoding(cp437) :std );
use utf8;

my $text = chr(0xC9);
my $length_in_characters = length $text;
print "Length of text '$text' in characters is $length_in_characters\n";

{
    use bytes;
    my $length_in_bytes = length $text;
    print "Length of text '$text' in bytes is $length_in_bytes\n";
}

{
    require Encode;
    my $bytes = Encode::encode_utf8($text);
    my $length_in_bytes = length $bytes;
    print "Length of text '$bytes' in bytes is $length_in_bytes\n";
}

##</code><code>##

Length of text 'É' in characters is 1
Length of text 'É' in bytes is 1
"\x{00c3}" does not map to cp437 at a.pl line 22.
"\x{0089}" does not map to cp437 at a.pl line 22.
Length of text '\x{00c3}\x{0089}' in bytes is 2