#!/usr/bin/perl
# convert3.pl
use warnings;
use strict;

my ($value, $from, $to, $rate, $rates, %rates);
%rates = (
	pounds          => 1,
	USD             => 1.6,
	marks           => 3.0,
	"french francs" => 10.0,
	yen             => 174.8,
	"swiss francs"  => 2.43,
	drachma         => 492.3,
	euro            => 1.5
);
print "Enter your starting currency: ";
OUTER0: while (<STDIN>) {
	chomp;
INNER0: for $from (%rates) {
	last OUTER0 if $from eq $_;
	}
}
print "Enter your target currency: ";
OUTER1: while (<STDIN>) {
	chomp;
INNER1: for $to (%rates) {
	last OUTER1 if $to eq $_;
        }
}
print "Enter your amount to convert: ";
$value = <STDIN>;
$rate = $rates{$to} / $rates{$from};
print "$value $from is ",$value*$rate," $to. \n";