Parsing a file to print multiple times

[ExperimentsWithPerl]

Hi

I am trying to parse a text file so print subsection of a file based on how many times the start and end strings are present in the file.

Now my sample.txt file is


1st line to ignore
2nd line to ignore
print from this line 1
lets print the following line too 1
Okay lets close it now 1
closing at this line 1
this was fine
but now is the problem
2nd line to ignore
print from this line as well 2
lets print the following line too 2
Okay lets close it too now 2
closing at this line 2
No I dont want to print this line
bye

I want my output to be


print from this line 1
lets print the following line too 1
Okay lets close it now 1
closing at this line 1
print from this line as well 2
lets print the following line too 2
Okay lets close it too now 2
closing at this line 2


But not able to achive the same.Tried two piece of codes:-

    #!/usr/bin/perl
    use strict;
    use warnings;

    undef $/;         
    open (FILE, '<', 'sample.txt') or die "Could not open sample.txt: 
+$!";
    
    my $file = <FILE>;      
    my ($printline) = 
         $file =~ m/.*?(print from.*?closing).*/sg;
    print $printline;
    
    close (FILE) or die "Could not close sample.txt: $!";

and

    open (FILE, '<', 'sample.txt') or die "Could not open sample.txt: 
+$!";
    open (FILE1, '>', 'output.txt') or die "Could not open output.txt:
+ $!";
    
    my @file = <FILE>;      # Whole file here now...
    my $sizeconf = scalar @file;
    #print $sizeconf;
    my $j = 0;
    #print $file[2];
   for (my $i  ; $i < $sizeconf ; $i++)
    {

    if ($file[$i] =~ /print from/){
        #print $i;
        print  $file[$i] if ($file[$i] !~ /closing/);
        my $sum = $i+1;
        for ($sum; $i < $sizeconf ; $i++){
            #$sum = $i+1;
            print  "$file[$i+1]"; 
            #$i++  ; 
            if ($file[$i] =~ /closing/ ){
                print $file[$i];
                break;
            }
        
        
        }
        
        
    }
}
    close (FILE) or die "Could not close sample.txt: $!";
    close (FILE1) or die "Could not close output.txt: $!";

. Kindly help.

[Anonymous Monk]

But not able to achive the same.

What do you achieve?

[ExperimentsWithPerl]

From the first code I am getting the output :-


print from this line 1
lets print the following line too 1
Okay lets close it now 1
closing

And from the second code I am getting the output :-


print from this line 1
lets print the following line too 1
Okay lets close it now 1
closing at this line 1
this was fine
closing at this line 1
but now is the problem
2nd line to ignore
print from this line as well 2
lets print the following line too 2
Okay lets close it too now 2
closing at this line 2
No I dont want to print this line
closing at this line 2
bye

[Anonymous Monk]

Try to fill in the blanks (...) to this

my @nums = 1 .. 10;
my $start = 3;
my $end = 5;
my $go = 0;
for my $num ( @nums ){
    ...
    if( $go ){
        print "$num\n";
    }
}