oops... I think you have gone astray somewhere there ...

firstly just declare the hash

my (%count);
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Now where you have $para++;$sen++;$vow++; replace them with$count{'para'}++; etc....

Finally in your print statement you need both the key (para,sen,vow) and the values (2,5 ,whatever )so replace print "$value"; with print "$value : $count{$value};
You should probably replace the $value with $key because it is misleading (it actually is the key and not/ the value.

What you were doing was creating 3 new variables which had nothing to do with your script.

I just had a look at the rest of you script and it's a bit of a mess :-) I dont have time now but here's how I would count the sentences and vowels

undef $/;

while(<>){
  my @chars=split(//,$_);
  foreach my $char (@chars) { 
    $count{'vow'}++ if(/[aeiou]/);
    $count{'sen'}++ if(/\./);
  }
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Diarmuid