I want to add the occurrence of the "energy" at the end of each of the printed line. My input file is as follows

536 ENERGY = -176.2 gag
1 0 2 0
2 1 3 533
3 2 4 532
536 ENERGY = -175.9 gag
1 0 2 0
2 1 3 533
3 2 4 532
My code is as follows 
  open(MYFILE, $data_file) || die("Could not open file!");
$b=$between=$energy=0;
while (<MYFILE>) {

   foreach $line (<MYFILE>)
{
if (/\bENERGY\b/) 
    {
       ++$energy;
        #print "$energy\n";
@line = $line;
(@line[0],@line[1],@line[2], @line[3], @line[4], @line[5], @line[6])=s
+plit(/\s+/,$line);
if(@line[2] ne ENERGY)
 {
 
 if (@line[3] != 0)
 {
 print "@line[1]  @line[3] \t $energy\n";
 }
 
 if (@line[4] != 0)
 {
 print "@line[1]  @line[4] \t $energy\n";
 }
 
 if(@line[5] != 0)
 {
 print "@line[1]  @line[5] \t $energy\n";
}
}
}
}
}
close(MYFILE);

[download]

I have taken array for splitting the columns so that first integer in every row makes a pair with 2nd, 3rd and 4th integer of each column omitting the pairs containing zero and "energy" lines. My output generated is follows

1 2 1
2 1 2
2 3 2
2 533 2
3 2 3
3 4 3
3 532 3
1 2 5
2 1 6
2 3 6
2 533 6
3 2 7
3 4 7
3 532 7

This code is counting the number of all lines but what i want is that upto 7th row, that is, 3 532 it should print 1 in the 3rd column as the pairs are after the first "energy" occurrence line. Then from 8th row to 14th row i-e from 1 2 to 3 532 it should print 2 in the 3rd column as the pairs are after the second "energy" occurrence. The output should be as follows.

1 2 1
2 1 1
2 3 1
2 533 1
3 2 1
3 4 1
3 532 1
1 2 2
2 1 2
2 3 2
2 533 2
3 2 2
3 4 2
3 532 2

Any help will be appreciated as i am new to programing + perl. Thanks

In reply to Structure number by AG87

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