note
terra incognita
Here is a modified version that will display a simple ASCII representation for those people like myself that think better in pictures. <br>I am sure that this can be improved significantly. <br>Comments on where I can improve this code and what practices I should stay away from are appreciated. <br>This should work on both Windows and Solaris though the format may be a little off on Solaris.
<code>
#!/usr/local/bin/perl
use strict;
# Towers of Hanoi
# Perl version (5.8.0)
# Ported from Java
my $numdisks = 0;
my $count =0;
print "Number of disks? ";
chomp( $numdisks = <STDIN> );
clear ();
my $i;
my @polea;
my @poleb;
my @polec;
my $loop = 0;
my $string ;
while ($numdisks > $loop++) {
$string = $string ."x";
push (@polea, $string);
push (@poleb, "");
push (@polec, "");
}
print "A\tB\tC\n";
for (my $len = 0 ;$len <= ($numdisks -1); $len++) {
print "$polea[$len]\t$poleb[$len]\t$polec[$len]\n";
}
sleep 2;
clear ();
movedisks( $numdisks, 'A', 'B', 'C' );
# SUB LAND
sub clear {
if ($^O eq "MSWin32") {
system 'cls';
}else{
system 'clear';
}
}
sub movedisks {
my( $num, $from, $to, $aux ) = @_;
if( $num == 1 ) {
paintdisks ($num, $to, $from);
}else{
movedisks( $num-1, $from, $aux, $to );
paintdisks ($num, $to, $from);
movedisks( $num-1, $aux, $to, $from );
}
}
sub paintdisks {
my( $num, $dest, $source) = @_;
my $foo;
if ($source eq "A") {
$foo = $polea[0];
shift @polea;
}elsif ($source eq "B") {
$foo = $poleb[0];
shift @poleb;
}else{
$foo = $polec[0];
shift @polec;
}
if ($dest eq "A") {
unshift @polea, $foo;
}elsif ($dest eq "B") {
unshift @poleb, $foo;
}else{
unshift @polec, $foo;
}
print "A\tB\tC\n";
for (my $len = 0 ;$len <= ($numdisks -1); $len++) {
print "$polea[$len]\t$poleb[$len]\t$polec[$len]\n";
}
sleep 2;
clear ();
}
</code>
400359
400359