arun15986:

Your requirements are still unclear (to me, at least), but it looks like you just need to buffer some records. You can store records by putting them in an array, then print them as needed. Here's a simple example program (similar to yours, but I didn't try to meet your requirements):

#!/usr/bin/perl -w
use strict;
use warnings;
my @record_buffer;
while (<DATA>) {
        print "INP (buff=" . scalar(@record_buffer) . "): $_";
        my @data = split /\s+/, $_;
        if ($data[1] < 20) {
                if (@record_buffer > 3) {
                        print_buffered_recs( "WORSE" );
                }
                elsif (@record_buffer > 0) {
                        print_buffered_recs( "BAD" );
                }
                print_rec( \@data, "GOOD" );
        }
        elsif ($data[2] > 5) {
                print_buffered_recs( "FAIR" );
                print_rec( \@data, "XYZZY" );
        }
        else {
                # We don't know yet, store the record
                push @record_buffer, [ @data ];
        }
}
# At the end, you may still have buffered records, so be
# sure to do something with them!
print_buffered_recs( "EXTRA" );

sub print_buffered_recs {
        my $comment = shift;
        print_rec($_, $comment) for @record_buffer;
        @record_buffer = ();
}

sub print_rec {
        my $rRec = shift;
        my $comment = shift;
        print "OUT: ", join(", ", @$rRec, $comment), "\n";
}

__DATA__
HI  28   0  FUNKY
HI  27   1  FUNKY
HI  26   3  FUNKY
HI  25   2  FUNKY
HI  24   3  FUNKY
HI  19   6  FUNKY
LO   1  11  ODD
LO   3   6  ODD
LO   4   1  WIERD
SEL  5   1  ECCENTRIC
SEL  2   1  N/A
SEL  2   1  N/A
SEL  2   1  N/A
SEL  2   7  N/A
OUT1 1   1  N/A
OUT2 1   1  N/A
HI  28   0  N/A
HI  28   0  ODD
[download]

This gives the output:

[08:21:18] ~
$ ./820888.pl
INP (buff=0): HI  28   0  FUNKY
INP (buff=1): HI  27   1  FUNKY
INP (buff=2): HI  26   3  FUNKY
INP (buff=3): HI  25   2  FUNKY
INP (buff=4): HI  24   3  FUNKY
INP (buff=5): HI  19   6  FUNKY
OUT: HI, 28, 0, FUNKY, WORSE
OUT: HI, 27, 1, FUNKY, WORSE
OUT: HI, 26, 3, FUNKY, WORSE
OUT: HI, 25, 2, FUNKY, WORSE
OUT: HI, 24, 3, FUNKY, WORSE
OUT: HI, 19, 6, FUNKY, GOOD
INP (buff=0): LO   1  11  ODD
OUT: LO, 1, 11, ODD, GOOD
INP (buff=0): LO   3   6  ODD
OUT: LO, 3, 6, ODD, GOOD
INP (buff=0): LO   4   1  WIERD
OUT: LO, 4, 1, WIERD, GOOD
INP (buff=0): SEL  5   1  ECCENTRIC
OUT: SEL, 5, 1, ECCENTRIC, GOOD
INP (buff=0): SEL  2   1  N/A
OUT: SEL, 2, 1, N/A, GOOD
INP (buff=0): SEL  2   1  N/A
OUT: SEL, 2, 1, N/A, GOOD
INP (buff=0): SEL  2   1  N/A
OUT: SEL, 2, 1, N/A, GOOD
INP (buff=0): SEL  2   7  N/A
OUT: SEL, 2, 7, N/A, GOOD
INP (buff=0): OUT1 1   1  N/A
OUT: OUT1, 1, 1, N/A, GOOD
INP (buff=0): OUT2 1   1  N/A
OUT: OUT2, 1, 1, N/A, GOOD
INP (buff=0): HI  28   0  N/A
INP (buff=1): HI  28   0  ODD
OUT: HI, 28, 0, N/A, EXTRA
OUT: HI, 28, 0, ODD, EXTRA

[08:22:03] ~
$
[download]

...roboticus