What you call a hash actually seems to be at least one array of arrays. And giving us a dump of your datastructure is a good idea, but it works better if you pass a reference (by adding \ in front of your variables) rather than the hash or array directly. In your case that would probably be something like :

use Data::Dumper;
my @array = somecode();
print Dumper \@array;
[download]

I'd add perldsc to mtmcc's answer, to obtain a better understanding of Perl data structures. And most of times in Perl, you don't have to use indexes to iterate through an array, you can just write

 for my $element (@f)
{
   my $key = $element->[0];
   ...
}
[download]

Hi Experts,

The input file has data, as shown below

File - 1  - Animals
A    RACK    2    2
B    RACK    2    2
C    RACK    2    2
D    RACK    2    2

FIle - 2 - Fruits
A    RACK    2    2
B    RACK    2    2
C    RACK    2    2
D    RACK    2    2

File - 3 -  Vegetables
E    TACK    4    2
F    TACK    4    2
G    TACK    4    2
H    TACK    4    2
[download]

The output i am expecting shown below

        
Rack
A    4    4
B    4    4
C    4    4
D    4    4
Subtotal16    16


Rack
E    4    2
F    4    2
G    4    2
H    4    2
Subtotal16    8

Total    32    24
[download]

• With "Animals, fruit and vegetables--oh, my!" in your data set, is this a homework assignment?
• Posting your complete code, in this case, would be helpful when asking for assistance.
• You forgot to ask a question.

G'day Perlseeker_1,

Both this, and your subsequent post, seem poorly worded and lacking information. I do not appear to be alone in having trouble understanding exactly what you want. Please read "How do I post a question effectively?" to see how to improve your posts.

This general class of problem looks like a simple case of reading files and keeping track of totals. Given your second post has input data and some indication of the output (I've guessed at how you get 2x"Rack" from 8x"RACK" and 4x"TACK"), here's some simple code to accumulate totals and output the results.

#!/usr/bin/env perl -l

use strict;
use warnings;

use Inline::Files;

my @file_handles = \(*ANIMALS, *FRUITS, *VEGETABLES);
my %data;

for my $fh (@file_handles) {
    while (<$fh>) {
        my ($id, $type, $val1, $val2) = split;
        $data{in}{$type}{$id}{val1} += $val1;
        $data{in}{$type}{$id}{val2} += $val2;
        $data{subtotal}{$type}{val1} += $val1; 
        $data{subtotal}{$type}{val2} += $val2; 
        $data{total}{val1} += $val1; 
        $data{total}{val2} += $val2;
    }
} 

for my $type (sort keys %{$data{in}}) {
    print $type;
    for (sort keys %{$data{in}{$type}}) {
        print join("\t" => $_, @{$data{in}{$type}{$_}}{qw{val1 val2}})
+;
    }
    print join("\t" => 'Sub', @{$data{subtotal}{$type}}{qw{val1 val2}}
+);
}
print join("\t" => 'Tot', @{$data{total}}{qw{val1 val2}});

__ANIMALS__
A   RACK    2   2
B   RACK    2   2
C   RACK    2   2
D   RACK    2   2
__FRUITS__
A   RACK    2   2
B   RACK    2   2
C   RACK    2   2
D   RACK    2   2
__VEGETABLES__
E   TACK    4   2
F   TACK    4   2
G   TACK    4   2
H   TACK    4   2
[download]

Output:

RACK
A       4       4
B       4       4
C       4       4
D       4       4
Sub     16      16
TACK
E       4       2
F       4       2
G       4       2
H       4       2
Sub     16      8
Tot     32      24
[download]

If you are unable to adapt this to your requirements, ensure you adhere to the guidelines in "How do I post a question effectively?" when asking any follow-up questions.

Hi Experts,

Thanks for the responses

I got the requireq out put, but when i tired to add zero if no value is defined for a variable,i didnt get the required output

#!/usr/bin/env perl -l

use strict;
use warnings;

use Inline::Files;

my @file_handles = \(*ANIMALS, *FRUITS, *VEGETABLES);
my %data;

for my $fh (@file_handles) {
    while (<$fh>) {
        my ($id, $type, $val1, $val2) = split;
    if ($val1 eq ""){
    $val1 = "0.00";
    }
        $data{in}{$type}{$id}{val1} += sprintf "%.2f", $val1;
        $data{in}{$type}{$id}{val2} += sprintf "%.2f", $val2;
        $data{subtotal}{$type}{val1} += sprintf "%.2f", $val1; 
        $data{subtotal}{$type}{val2} += sprintf "%.2f", $val2; 
        $data{total}{val1} += $val1; 
        $data{total}{val2} += $val2;
    }
} 

for my $type (sort keys %{$data{in}}) {
    print $type;
    for (sort keys %{$data{in}{$type}}) {
        print join("\t" => $_, @{$data{in}{$type}{$_}}{qw{val1 val2}})
+;
    }
    print join("\t" => 'Sub', @{$data{subtotal}{$type}}{qw{val1 val2}}
+);
}
print join("\t" => 'Tot', @{$data{total}}{qw{val1 val2}});
[download]

Output

RACK
A       0       0
B       0       0
C       0       0
D       0       0
Sub     0       0
TACK
E       0       0
F       0       0
G       0       0
H       0       0
Sub     0       0
Tot     0      00
[download]

please guide me where i went wrong

Thanks

This looks more like 3 tables in a database, is this the case?

Me I suggest you take a look at DBD::CSV