Re^3: converting binary to decimal

[tybalt89]

replace

my $decimal = (join '', map sprintf('%0*d', $size, $_), reverse @numbe
+r)
  =~ s/0+(?=.)//r;

with

s/0+(?=.)// for my $decimal = join '', map sprintf('%0*d', $size, $_),
+ reverse @number;

It's just doing math in base $n which is 10**18 in this case (because that's the largest power of 10 that works on my machine). Change $size to 1 to see it work (more slowly) in base 10.

It's doing the same kind of thing that 'bigint' does...

[harangzsolt33]

The output I'm getting looks like this. And I don't know why. I tried both suggestions, and it's the same with both:

000000001-00000000000000001-00000000000000001-00000000000000001-000000
+0000000000
1-00000000000000001-00000000000000001-00000000000000001-00000000000000
+001-000000
00000000001-00000000000000001-00000000000000001-00000000000000001-0000
+0000000000
001-00000000000000001-00000000000000001-00000000000000001-000000000000
+00001-0000
0000000000001-00000000000000001-00000000000000001-00000000000000001-00
+0000000000
00001-00000000000000001-00000000000000001-00000000000000001-0000000000
+0000001-00
000000000000001-00000000000000001-00000000000000001-00000000000000001-
+0000000000
0000001-00000000000000001-00000000000000001-00000000000000001-00000000
+000000001-
00000000000000001-00000000000000001-00000000000000001-0000000000000000
[phone]
000000001-00000000000000001-00000000000000001-00000000000000001-000000
+0000000000
1-00000000000000001-00000000000000001-00000000000000001-00000000000000
+001-000000
00000000001-00000000000000001-00000000000000001-00000000000000001-0000
+0000000000
001-00000000000000001-00000000000000001-00000000000000001-000000000000
+00001-0000
0000000000001-00000000000000001-00000000000000001-00000000000000001-00
+0000000000
00001-00000000000000001-00000000000000001-00000000000000001-0000000000
+0000001-00
000000000000001-00000000000000001-00000000000000001-00000000000000001-
+0000000000
0000001-00000000000000001-00000000000000001-00000000000000001-00000000
+000000001-
00000000000000001-00000000000000001-00000000000000001-0000000000000000
[phone]
000000001-00000000000000001-00000000000000001-00000000000000001-000000
+0000000000
1-00000000000000001-00000000000000001-00000000000000001-00000000000000
+001-000000
00000000001-00000000000000001-00000000000000001-00000000000000001-0000
+0000000000
001-00000000000000001-00000000000000001-00000000000000001-000000000000
+00001-0000
0000000000001-00000000000000001-00000000000000001-00000000000000001

[tybalt89]

<fightingsarcasm>It would be helpful to see the code that produces this output.</fightingsarcasm>

[harangzsolt33]

Sure. Here is the code:

#!/usr/bin/perl

use strict;
use warnings;

my $size = 18;
my $n = 10 ** $size;
my @number = 0;

my $binary = 1 . 0 x 8192;

for ( split //, $binary )
{
  my $carry = $_;
  for ( @number )
    {
    $_ += $_ + $carry;
    $carry = int $_ / $n;
    $_ %= $n;
    }
  $carry and push @number, $carry;
}
s/0+(?=.)// for my $decimal = join '', map sprintf('%0*d', $size, $_),
+ reverse @number;
print "$decimal\n";