My program requires to read an input file with 3 columns(month dates, fileSize, fileName)in 3 steps: Here I only sample 2 months dates in Julian year order to give an example.
  1. count the total number of files loaded in each month.
  2. count the total file size for each month.
  3. count the largest file size in each month.
I need help to correct my code; when I run it, the output is not in individual month but in whole months. I also need the output in Descending order by file size for individual month. The month date and file name should automatically match their file size as well, so I can find the largest file with its date and file name. I am not sure which code can handle it. Much appreciated if anyone could improve my code to approach the solution. Here is my input file format. Second column is the file size. 
001 175 FILENAME
002 1856 FILENAME
003 177 FILENAME
032 175 FILENAME
033 2345 FILENAME
034 175 FILENAME

[download]
Here is my code: 
#!/usr/bin/perl
     use strict;
use warning;
use Data::Dumper;
use File::Find;
use File::stat;
use sort 'stable';

my $filin = '/root/scripts/newsort.in';
my $fleot = '/root/scripts/results/size.out';

open my $fh, $filin || die $!;
open my $fot, ">$fleot" || die $!;


##Define month lengths
@Janlen = ( '006', '007', '008', '009', '010', '011', '012', '013', '0
+14', '015', '016', '017', '018', '019', '020', '021', '022', '023', '
+024', '025', '026', '027', '028', '029', '030', '031' );
@Feblen = ( '032', '033', '034', '035', '036', '037', '038', '039', '0
+40', '041', '042', '043', '044', '045', '046', '047', '048', '049', '
+050', '051', '052', '053', '054', '055', '056', '057', '058', '059' )
+;
#Define month hash
%mthlens = (@Janlen, @Feblen);
my @julens = %mthlens;
my $julias = @julens;
my $Janlias = @Janlen;
my $Feblias = @Feblen;
my $Marlias = @Marlen;

while (%mthlens=<$fh>){
chomp;

my %lengths = map { $_ => length $_ } %mthlens;
while ( my ($Janlen,$length,$filename) = each 
%lengths) { 
     @s = sort { $length{$b} <=> $length{$a}} keys 
 %length;
     print join("\t", $Janlen,  $length, $filename 
), "\n";
   } 
} 
[/code]

Here is my output file format.
File sizes are displayed in the second column. I am not sure what are 
+the numbers following FILENAME, such as 38, 33 , 38 ....

[code]024 710 FILENAME 
        38
114 923 FILENAME
        33
044 367 FILENAME
        38
083 7864 FILENAME
        39
153 783 FILENAME
        33
084 864 FILENAME

[download]
Very appreciated for any input! Thank you!

In reply to Help! Stuck on methods to count file size. by Anonymous Monk

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