#!/usr/bin/perl
use strict;
use warnings;
use diagnostics;
use Math::Vector::Real;

my $source = "./IN";

my $out = "./OUT";

open(IN, '<', $source) or die "Couldn't open $source: $!\n";
open(OUT, '>', $out) or die "Couldn't open $out: $!\n";

sub vector {
    my ($aa) = @_;
    $aa->[0] = my $one;
    $aa->[1] = my $two;
    $aa->[2] = my $three;
    my $vector = V($one, $two, $three);
}

my @data = map [ split ], grep /\S/, <IN>;

foreach my $d1 (@data) { print OUT " The vector of Atom ($d1->[0], $d1->[1], $d1->[2])is : %f\n", vector($d1); }

close IN;
close OUT;

##</code><code>##


0 5 5
1 2 3
3 5 6
2 5 2
5 5 5
5 5 6

##</code><code>##

mac95406:perl a7c$ ./perl
Use of uninitialized value in join or string at
	/Library/Perl/5.16/Math/Vector/Real.pm line 219, <IN> line 6 (#1)
    (W uninitialized) An undefined value was used as if it were already
    defined.  It was interpreted as a "" or a 0, but maybe it was a mistake.
    To suppress this warning assign a defined value to your variables.
    
    To help you figure out what was undefined, perl will try to tell you
    the name of the variable (if any) that was undefined.  In some cases
    it cannot do this, so it also tells you what operation you used the
    undefined value in.  Note, however, that perl optimizes your program
    anid the operation displayed in the warning may not necessarily appear
    literally in your program.  For example, "that $foo" is usually
    optimized into "that " . $foo, and the warning will refer to the
    concatenation (.) operator, even though there is no . in
    your program.
    

##</code><code>##

 
sub as_string { "{" . join(", ", @{$_[0]}). "}" }