hm - right, i fix up the indentations
use the appropriate things for finding values
put the declarations in the correct 'scope'
use strict
and er... stop the braindeaded use of qw...

and so with various other edits, this is what i've come up with 

#!/usr/bin/perl
use strict;
use warnings;
sub argscan{
    my @subarg = ($_[0],$_[1],$_[2]);
    my $argcount;
    my $found;
    my $notfound;
    my @whenfound; 
    if (@ARGV == 1) {
        return 0;
    }
        elsif ($subarg[0] = undef) {
            $argcount = @ARGV;
            return $argcount; 
        }
        else {
            while ($argcount <= @ARGV) {
                if ($ARGV[$argcount] == $subarg[0]){
                    $found++;
                    $whenfound[$argcount] = 1;
            }
                 else {
                    $notfound++;
                    $whenfound[$argcount] = 0;
            }
            $argcount++;
        }
        if ($subarg[1] eq "foundcount") {
            if (defined($found)) {
                return $found
                }
            }
        elsif ($subarg[1] eq "notfoundcount") {
            if (defined($notfound)) {
                return $notfound
            }
        }    
        elsif ($subarg[1] eq "huntfor") {
            if (defined($found)) {
                return $whenfound[$subarg[2]]
            }
        }
        else {return 0
        }
    }
}

my $argnumber = argscan();
my $carnumber = argscan(qw(car foundcount));
my $notcarnumber = argscan(qw(car notfoundcount));
my $bunnynumber = argscan(qw(bunny foundcount));



print "there are $argnumber arguments \n
    there are $carnumber cars 
    there are $bunnynumber bunnies 
    $notcarnumber args are not cars \n ";

[download]

which executes and produces the output: 
there are 0 arguments

        there are 0 cars
        there are 0 bunnies
        0 args are not cars
when I execute it with any given argument

and gives this output when I execute it with any arguments: 
Use of uninitialized value in numeric le (<=) at testargscan.pl line 18.
Use of uninitialized value in array element at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in array element at testargscan.pl line 21.
Use of uninitialized value in string eq at testargscan.pl line 29.
Use of uninitialized value in string eq at testargscan.pl line 29.
Use of uninitialized value in string eq at testargscan.pl line 29.
Use of uninitialized value in numeric le (<=) at testargscan.pl line 18.
Use of uninitialized value in array element at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in array element at testargscan.pl line 21.
Use of uninitialized value in numeric le (<=) at testargscan.pl line 18.
Use of uninitialized value in array element at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in array element at testargscan.pl line 21.
Use of uninitialized value in numeric le (<=) at testargscan.pl line 18.
Use of uninitialized value in array element at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in numeric eq (==) at testargscan.pl line 19.
Use of uninitialized value in array element at testargscan.pl line 21.
there are 0 arguments

        there are 1 cars
        there are 1 bunnies
         args are not cars
which isn't the bahaviour i'm looking for

what I am looking for is a simple test of a subroutine, which I'm trying to use in a larger program for XML handling, cycles through the argument array looking for the values specified when I call it (in this case - cars and bunnies, just because I could) and returning what I ask for.

so should be pretty easy, except I must be doing something fundamentally wrong
thanks for peoples help, and as for tutorials, i've only had a breif look at llama book and read some source code, so i'm not surprised I'm making careless mistakes
i'll get back to it

In reply to Reply to replies and update by Maze
in thread Confused about 'Name "main::whenfound" used only once:' by Maze

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