There is an easy way in perl to do such edits in-place, but that's not what you want. Here's how.

We'll start with the splatline and other preliminaries. The splatline can be useful even on win32 systems, since perl can still obtain options from it.

#!/usr/bin/perl
use warnings;
use strict;
[download]

We'll define a glob pattern for the input files, and an output path, and bring in a standard module function for extracting filenames from paths.

my $infiles = '/path/to/RETAKC*.txt';
my $outpath = '/another/path/';
use File::Basename 'basename';
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Now let's define a hash whose keys are the text to be replaced, and values, their replacement. We'll construct a big alternation regex from the keys. It will capture whatever it matches.

my %substitute = (
    '0000J' => '000-1',
    # . . .
);
my $regex = qr/(${\join '|', keys %substitute})/;
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Now we're ready to do the deed. We get all our filenames with glob and loop over them. We open each to read, and an output file to accept the results. We apply our substitution globally to each line and print to the output file.

for my $file (glob $infiles) {
    open my $in, '<', $file or warn $! and next;
    open my $out, '>', $outpath.basename($file)
        or warn $! and next;
    while (<$in>) {
        s/$regex/$substitute{$1}/g;
        print $out $_;
    }
}
[download]

That's it. All your substitutions made to new copies of all your files.

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