combining 2 lists in perl

[el77c]

I am new to programing and am trying to learn. I am trying to use perl to merge to list of data. for example:
list 1:
aaaa
bbbb
cccc
dddd
list 2:
aaaa
bbbb
cccc
dddd
The output that I want is:
aaaa bbbb
bbbb ccccc
cccc dddd
I have written a perl script and can get this type of an output:
aaaa aaaa
bbbb aaaa
cccc aaaaa
dddd aaaa

This is my script:

[/open FILE1, "<myfile.txt" or die $!;
while (<FILE1>)
{
my $file1_line = $_;
chomp $file1_line;

open FILE2, "<myfile.txt" or die $!;
while (<FILE2>)
{
my $file2_line = $_;
chomp $file2_line;

printf ("%s\t%s\n", $file1_line, $file2_line);

}
close (FILE2);
}
close (FILE1); ]


I am not sure what I am doing wrong. any help would be greatly appreciated.

thanks

[miller]

Why do you want this output?

aaaa bbbb
bbbb ccccc
cccc dddd
 

What meaningful algorithm is this demonstrating, if any?

- Miller

[chorny]

You are reading whole second file for every line of first.

[sathishkumar se]

Hi,
please use this program.


open FILE1, "<myfile.txt" or die $!;
my $count=2;
while (<FILE1>)
{
my $file1_line = $_;
chomp $file1_line;
open FILE2, "<myfile.txt" or die $!;
my $temp_count=1;
while (<FILE2>)
{
my $file2_line = $_;
chomp $file2_line;
if($count eq $temp_count)
{
printf ("%s\t%s\n", $file1_line, $file2_line);
$count++;
last;
}
$temp_count++;
}
close (FILE2);
}
close (FILE1);