#! perl
use strict;
use warnings;
my $file = 'test.txt';
open(my $fh, '>', $file)
or die "Cannot open file '$file' for writing: $!";
use Tie::STDOUT
print => sub
{
print @_;
print $fh '[', scalar localtime, ']: ', @_;
},
printf => sub
{
printf @_;
print $fh '[', scalar localtime, ']: ';
printf $fh @_;
};
print "Perl is cool!\n";
printf "Pi is %f\n", atan2(1, 1) * 4;
close $fh
or die "Cannot close file '$file': $!";
####
16:32 >perl 1504_SoPW.pl
Perl is cool!
Pi is 3.141593
16:32 >
##
##
[Tue Jan 5 16:32:03 2016]: Perl is cool!
[Tue Jan 5 16:32:03 2016]: Pi is 3.141593