use strict;
use warnings;

my $valuesFile = 'file.txt';
my (@points, $count);
my @keys = qw(A X Y Z);

open FH, $valuesFile or die "Can't open $valuesFile: $!";

while(<FH>){
	chomp;
	my %pointHash;
	$pointHash{$keys[$count++]} = $_ for (split)[0, 2..4];
	push @points, \%pointHash;
	$count=0;
}

close FH or die "Can't close $valuesFile: $!";

my @results;

for my $x(0..$#points){
   my $p1 = $points[$x];
   for my $y (0..$#points){
        my $p2 = $points[$y];
        my $dist = sqrt(abs(( $p1->{X} - $p2->{X} ) **2
                 + ( $p1->{Y} - $p2->{Y} ) **2
                 + ( $p1->{Z} - $p2->{Z} ) **2)) ;  
        $results[$x][$y] = sprintf("%.0f", $dist);
   }
 }
#-------------------

print "\t";
print "$points[$_]->{A}\t" for(0..$#points);
print "\n";

$count = 0;

for my $r (@results){
	print "$points[$count++]->{A}\t";
	printf "%.0f\t",$_ for @$r;
	print "\n";
 }

##</code><code>##

	A	B	C	
A	0	4	5	
B	4	0	4	
C	5	4	0