If you're planning to read through a list of files from the command line, then you should really use <> - it saves you all the work of opening all the files etc..
And, rather than all that work with $in_pod, I'd just use the range operator.
A line containing no alphanumerics is not counted as a line of code
Not sure I'd agree with that. Haven't you seen some of the JAPHs posted :) I'd personally check for absence of non-whitespace.
So, personally, I'd reduce all this down to:
#!/usr/bin/perl -w
use strict;
my $total = my $pod = my $comment = my $blank = my $code = 0;
while(<>) {
$total++;
if ( /^=\w+/ .. /^=cut/ ) { $pod++; next }
if ( /^\s*#/ ) { $comment++; next }
unless ( /\S/ ) { $blank++; next }
$code++;
}
print <<END;
Total: $total
POD: $pod
Comments: $comment
Blank: $blank
Code: $code
END
Tony
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