| 1 | #! /usr/bin/perl |
| 2 | |
| 3 | $len = shift || 32; |
| 4 | $op = shift || "+"; |
| 5 | |
| 6 | sub r { |
| 7 | my $l = shift || $len; |
| 8 | my $i; |
| 9 | my $s; |
| 10 | for ($i = 0; $i < $l; $i++) { |
| 11 | my $x = rand(256); |
| 12 | $s .= sprintf("%02x", $x); |
| 13 | } |
| 14 | return $s; |
| 15 | } |
| 16 | |
| 17 | $| = 1; |
| 18 | open(BC, "|bc | tr A-Z a-z") or die; |
| 19 | print BC "obase=16\nibase=16\n"; |
| 20 | $x = r(); |
| 21 | if ($op eq "<<" || $op eq ">>") { |
| 22 | $y = int(rand($len * 4)) + int(rand($len * 4)); |
| 23 | $op = ($op eq "<<" ? "*" : "/"); |
| 24 | $z = sprintf("%x", $y); |
| 25 | print "$x $y\n"; |
| 26 | print BC "\U$x $op (2^$z)\n"; |
| 27 | } elsif ($op eq "/") { |
| 28 | $ylen = int(rand($len)) + 1; |
| 29 | $y = r($ylen); |
| 30 | print "$x\n$y\n"; |
| 31 | print BC "\U$x / $y\n$x % $y\n"; |
| 32 | } elsif ($op eq "2") { |
| 33 | print "$x\n"; |
| 34 | print BC "\U$x * $x\n"; |
| 35 | } else { |
| 36 | $y = r(); |
| 37 | print "$x\n$y\n"; |
| 38 | print BC "\U$x $op $y\n"; |
| 39 | } |
| 40 | close(BC); |