use strict;
use warnings;
use HTML::SimpleLinkExtor;

my $FileOut = "output.txt";

open FileDOut, ">$FileOut" or die "Can't open output file $FileOut: $!";
print "Summary written in file $FileOut\n";

while (my $file = glob ("*.html")){
  print FileDOut "$file\n";
  my $extor = HTML::SimpleLinkExtor->new();
  $extor->parse_file($file);
  my @links = $extor->links();
  print FileDOut "$_\n" for (@links);
  print FileDOut "\n";
}

close FileDOut;