# An array of hash references can be pretty nice, too:
my @c = (  
   { a=>6, b=>3 },
   { a=>7, b=>2 },
   { a=>8, b=>1 },
);

# Then printing the related data is easy, and you needn't track the array index
for my $item (@c) {
   print $item->{a},"\n" if $item->{b}>1;
}