Yeah, you can either use a positive integer as a file handle, or you can use a text label or you may use a variable name with a dollar sign in front of it, but if you do that, then you have to declare the variable my $INPUT_FILE_HANDLE; before you can use it. Notice, I like to write the < > signs and the file name as one string. That way my Perl script will be backward compatible with older DOS Perl. (I currently use TinyPerl 5.8, but it's neat when I can run the same script in DOS as well.) Also, don't forget to close your opened file handles before the program ends. ;) 


#!/usr/bin/perl -w

use strict;
use warnings;

open(INPUT_FILE_HANDLE, '< c:/boot.ini') or die('Cant open file for re
+ading');
open(OUTPUT_FILE_HANDLE, '> c:/outfile.txt') or die('Cant open file fo
+r writing');

print <INPUT_FILE_HANDLE>;
print OUTPUT_FILE_HANDLE "Hello world!!!\n";

close OUTPUT_FILE_HANDLE;
close INPUT_FILE_HANDLE;

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In reply to Re: Usage of File Handles by harangzsolt33
in thread Usage of File Handles by catfish1116

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