# Let's see how much money I would have if I just won the
# lottery and found a 2 pound coin in the couch cushions...
How many 5 pence pieces do you have? 0
How many 10 pence pieces do you have? 0
How many 20 pence pieces do you have? 0
How many 50 pence pieces do you have? 0
How many £1 coins do you have? 1000000000
How many £2 coins do you have? 1
How many £5 notes do you have? 0
How many £10 notes do you have? 0
How many £20 notes do you have? 0
How many £50 notes do you have? 0
You have £2.
# Hmm, guess I won't spend my £2 on a lottery ticket then...

##</code><code>##

#!/usr/bin/perl -w
use strict; use warnings;
use List::Util qw( sum );
printf( "You have £%.02f\n", sum (
    ( map { ask( "$_ pence pieces", $_/100 ) } ( 5, 10, 20, 50 ) ),
    ( map { ask( "£$_ coins", $_ ) } ( 1, 2 ) ),
    ( map { ask( "£$_ notes", $_ ) } ( 5, 10, 20, 50 ) ),
) );
sub ask { print "How many $_[0] do you have? " ; <STDIN> * $_[1] }