I knocked up a module, probably my first ever, to do rounding. I used POSIX::ceil() and POSIX::floor() to a recipe I saw in a C text book. Written before I knew about strict and warnings, I'm afraid; I'll have to revisit it one day.
package Rounders;
use Exporter;
@ISA = ('Exporter');
@EXPORT = qw(rndZero rndPlaces);
use Carp;
use POSIX qw(ceil floor pow);
sub rndZero
{
my($val) = shift;
my $rounded = $val < 0 ?
POSIX::ceil($val - 0.5) : POSIX::floor($val + 0.5);
return $rounded;
}
sub rndPlaces
{
my($val, $places) = @_;
my $rounded = rndZero($val * POSIX::pow(10.0, $places)) /
POSIX::pow(10.0, $places);
return $rounded;
}
1;
Calling like this
$toNearest100 = rndPlaces(1234.56, -2);
would result in $toNearest100 getting a value of 1200. Cheers, JohnGG
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