Wait, oops. I forgot to add an extra if clause. The new code looks like: 

#!/usr/bin/perl
use warnings;
use strict;
my $up = "\e[A";
my @history = [];
my $number = 10;
print "Input the dice and modifier you want to roll like this: 2d9+100
+. To quit, press Ctrl-C.\n";
while (1) {
    my $dice = <>; chomp $dice;
    my @arr = split (/d/, $dice);
    if ($dice eq $up) {
        $dice = $history[-1];
    } elsif ($dice =~ /\+/) {
        my @arr2 = split (/\+/, $arr[1]);
        $arr2[0]++;
        for my $i (1 .. $arr[0]) {
            print ((int(rand($arr2[0] - 1)) + 1 + $arr2[1]), "\n");
        }
    } else {
        $arr[1]++;
        for my $i (1 .. $arr[0]) {
            print ((int(rand($arr[1] - 1)) + 1), "\n");
        }
    }
    push @history, $dice;
}

[download]

When I run it, the up arrow doesn't cause any error messages, but it doesn't do anything either:

Input the dice and modifier you want to roll like this: 2d9+100. To qu
+it, press Ctrl-C.
2d9+100
109
101
^[[A
^C

[download]
$thanks++, zsl

In reply to Re^3: How to add input history by zsl
in thread How to add input history by zsl

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