it takes n fixed-point decimal digits to exactly represent an n-bit fixed-point fractional binary number

Thank you for correcting me ... but shouldn't that be "n+1 fixed-point decimal digits" ? 
use strict;
use warnings;
use Math::MPFR qw(:mpfr);

Rmpfr_set_default_prec(1000);

my $d = 1 / 11;
my $x = Math::MPFR->new($d);

print "$x\n", length($x), "\n";

# (print() removes trailing zeros.)
# Outputs:
9.09090909090909116141432377844466827809810638427734375e-2
58

[download]
Take out the "." and the "e-2" and we're left with 54 decimal digits.

Cheers,
Rob

In reply to Re^5: subtraction issue by syphilis
in thread subtraction issue by Anonymous Monk

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