my %function = (
  allergies => sub { print_allergies ( my $var) },
  immunizations => sub { print "in immunizations\n" },
);

my $dir = 'input_files';
die "can't opendir $!" unless opendir DIR, $dir;
while (defined(my $file = readdir DIR)) {
    do {
        # print "The directory and file are $dir/$file\n";
        die "Can't open input file $!" unless open IN, "< $dir/$file";
        use File::Glob ();
        while (defined($_ = glob(' IN '))) {
          # print "Hello $_";
        }
        # print_allergies (*IN);
        $function{$file}->() if exists $function{$file};
    };
}
closedir DIR;



sub print_allergies{
  local (*FH) = @_;

  while (<FH>){
    next if (/^#/);
    print  $_ ;
  }
}