UNTESTED, but this may work: 

@ARGV = glob 'datafile*';

open my $OUTPUT, '>', 'output_file' or die "Cannot open 'output_file' 
+because: $!";

while ( <> ) {
    if ( $. == 1 ) {
        print $OUTPUT $ARGV =~ /(\d+)$/, " has";
        }
    print $OUTPUT " ", ( split )[ 2 ];
    if ( eof ) {
        print $OUTPUT " $. columns\n";
        close ARGV;
        }
    }

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In reply to Re: opening many files by jwkrahn
in thread opening many files by wanttoprogram

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