Here's one way that you should be able to adapt for your needs. 

#! perl -sw
use strict;

my @data = <DATA>;
my ($type3total, $type4total) = (0,0);
my $state = '';
for (@data) {
    chomp;
    my ($part1, $part2) = split;
    if ($state eq "type4" && $part1 eq "3") {
        process( $type3total, $type4total );
        ($type3total, $type4total) = (0,0);
    }
    $state = "type$part1";
    $type3total += $part2 if ($part1 == 3);
    $type4total += $part2 if ($part1 == 4);
    die "array contains a type 7 record\n" if $part1 == 7;
}
process( $type3total, $type4total );

sub process {
    my ($type3, $type4) = (shift, shift);
    print "Processing type 3 total of $type3 and a type 4 total of $ty
+pe4\n";
    return;
}


__DATA__
3 200
4 50
3 100
3 100
3 100
4 50
4 25

[download]

Gives: 

C:\test>196448
3 - 200
4 - 50
3 - 100
Processing type 3 total of 200 and a type 4 total of 50
3 - 100
3 - 100
4 - 50
4 - 25
Processing type 3 total of 300 and a type 4 total of 75

[download]
Well It's better than the Abottoire, but Yorkshire!

In reply to Re: stoping and restarting a loop by BrowserUk
in thread stoping and restarting a loop by mnlight

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