print "MY LINE IN: $my_line_in\n\n";

##</code><code>##

#!/usr/bin/perl

# variable data to be input by the admin
#
$my_line_in="";


# contains the name of the section we are currently processing
$processing_section;


# open file to read the data
open (INFILE, "readData.txt") or die("Cannot open the input file. $!");


sub processSectionA1 {
        # Process data within the header
        #
        #### SECTION A1 (DO NOT REMOVE THIS LINE)

        # Process data
        print "In #### SECTION A1\n";
        print "MY LINE IN: $my_line_in\n\n";

        return;
}

sub processSectionD1 {
        # Process data within the header
        #
        #### SECTION D1 (DO NOT REMOVE THIS LINE)

        # Process data
        print "In #### SECTION D1\n";
        print "MY LINE IN: $my_line_in\n\n";

        return;
}

sub processSectionD2 {
        # Process data within the header
        #
        #### SECTION D2 (DO NOT REMOVE THIS LINE)

        # Process data
        print "In #### SECTION D2\n";
        print "MY LINE IN: $my_line_in\n\n";

        return;
}

LINE: while ( my $my_line_in = <INFILE> ){
        chomp $my_line_in;

        # ignore blank lines
        next LINE if ($my_line_in =~ m/^$/);

        # debug
        print "In while loop POINT 1: $my_line_in\n";

        # ignore comment lines with one hash tag
        # next LINE if ($my_line_in =~ m/^#{1,3}/);

        # debug
        print "In while loop POINT 2: $my_line_in\n";

        if ($my_line_in =~ m/^#### SECTION A1.*/){
                # debug
                print "In while loop POINT 3: $my_line_in\n";

                $processing_section = "A1";
                &processSectionA1;
        }
        elsif ($my_line_in =~ /^#### SECTION D1.*/){
                # debug
                print "In while loop POINT 4: $my_line_in\n";

                $processing_section = "D1";
                processSectionD1();
        }
        elsif ($my_line_in =~ /^#### SECTION D2.*/){
                # debug
                print "In while loop POINT 5: $my_line_in\n";

                $processing_section = "D2";
                processSectionD2();
        }

        else {
                # process hold value by processing last called subroutine
                if ($processing_section =~ /A1/){
                        # debug
                        print "In while loop POINT 6: $my_line_in\n";

                        processSectionA1();
                }elsif ($processing_section =~ /D1/){
                        # debug
                        print "In while loop POINT 7: $my_line_in\n";

                        processSectionD1();
                }elsif ($processing_section =~ /D2/){
                        # debug
                        print "In while loop POINT 8: $my_line_in\n";

                        processSectionD2();
                }
        }
}

close (INFILE);

##</code><code>##

#### SECTION A1 (DO NOT REMOVE THIS LINE)
##
Data in section A1
Data in section A1

#### SECTION D1 (DO NOT REMOVE THIS LINE)
##
Data in section D1
Data in section D1

#### SECTION D2 (DO NOT REMOVE THIS LINE)
##
Data in section D2
Data in section D2

##</code><code>##

[root@localhost admin_scripts]# ./processData.pl
In while loop POINT 1: #### SECTION A1 (DO NOT REMOVE THIS LINE)
In while loop POINT 2: #### SECTION A1 (DO NOT REMOVE THIS LINE)
In while loop POINT 3: #### SECTION A1 (DO NOT REMOVE THIS LINE)
In #### SECTION A1
MY LINE IN:

In while loop POINT 1: ##
In while loop POINT 2: ##
In while loop POINT 6: ##
In #### SECTION A1
MY LINE IN:

In while loop POINT 1: Data in section A1
In while loop POINT 2: Data in section A1
In while loop POINT 6: Data in section A1
In #### SECTION A1
MY LINE IN:

In while loop POINT 1: Data in section A1
In while loop POINT 2: Data in section A1
In while loop POINT 6: Data in section A1
In #### SECTION A1
MY LINE IN:

In while loop POINT 1: #### SECTION D1 (DO NOT REMOVE THIS LINE)
In while loop POINT 2: #### SECTION D1 (DO NOT REMOVE THIS LINE)
In while loop POINT 4: #### SECTION D1 (DO NOT REMOVE THIS LINE)
In #### SECTION D1
MY LINE IN:

In while loop POINT 1: ##
In while loop POINT 2: ##
In while loop POINT 7: ##
In #### SECTION D1
MY LINE IN:

In while loop POINT 1: Data in section D1
In while loop POINT 2: Data in section D1
In while loop POINT 7: Data in section D1
In #### SECTION D1
MY LINE IN:

In while loop POINT 1: Data in section D1
In while loop POINT 2: Data in section D1
In while loop POINT 7: Data in section D1
In #### SECTION D1
MY LINE IN:

In while loop POINT 1: #### SECTION D2 (DO NOT REMOVE THIS LINE)
In while loop POINT 2: #### SECTION D2 (DO NOT REMOVE THIS LINE)
In while loop POINT 5: #### SECTION D2 (DO NOT REMOVE THIS LINE)
In #### SECTION D2
MY LINE IN:

In while loop POINT 1: ##
In while loop POINT 2: ##
In while loop POINT 8: ##
In #### SECTION D2
MY LINE IN:

In while loop POINT 1: Data in section D2
In while loop POINT 2: Data in section D2
In while loop POINT 8: Data in section D2
In #### SECTION D2
MY LINE IN:

In while loop POINT 1: Data in section D2
In while loop POINT 2: Data in section D2
In while loop POINT 8: Data in section D2
In #### SECTION D2
MY LINE IN: