Wasn't sure if this belongs here, or in Obfuscations.
Having once run:
use strict;
use warnings;
use Storable;
my (%table);
foreach my $i (0..9) {
foreach my $j ($i..9) {
$table{$i}{$j} = $table{$j}{$i} = $i + $j
}
}
store \%table, 'addition_table';
I present to you: addition!
use strict;
use warnings;
use Storable;
my %table = %{retrieve('addition_table')};
my @problem = @ARGV;
my (%matrix);
foreach my $number (@problem) {
my $log = 0;
push @{$matrix{$log++}}, $_ for reverse (split //, $number);
}
my $col = 0;
while (exists $matrix{$col}) {
my @column = @{$matrix{$col}};
my $first = shift @column;
while(scalar @column > 0) {
my $second = shift @column;
$first = $table{$first}{$second};
if (length($first) > 1) {
$first = substr($first,-1,1);
push @{$matrix{$col + 1}}, 1;
}
}
$matrix{$col++} = $first;
}
printf "%s",$matrix{$col - $_} for (1..$col);
print "\n";
H:\perl>perl adder.pl 1
1
H:\perl>perl adder.pl 21 14 99 6 12
152
H:\perl>perl adder.pl 999999999999999999999999999999999999999999 1
1000000000000000000000000000000000000000000
Addition tables for other number systems are left as an exercise for the (extremely bored) reader. Vaguely apropos of Multiply Hex values. I started to write a program to do multiplication and realized I needed to figure out how to add first.
But God demonstrates His own love toward us, in that while we were yet sinners, Christ died for us. Romans 5:8 (NASB)
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