First, the main section revisited. I am going to call a collection of cards a deck.

create deck
shuffle deck

this_card = pull from deck
last_card = this_card
answer    = prompt('higher or lower')

for (rest of cards):
   this_card = pull from deck

   exit('was higher') if this_card > last_card and answer is 'lower'
   exit('was lower') if this_card < last_card and answer is 'higher'

   answer = prompt('higher or lower')
   last_card = this_card
end for

So, what is deck? Probably just a plain old Perl array. But, what is a card? It could be a simple scalar or it could be a more complicated object. One advantage of going the OO route is using overload to handle the comparison of cards:

... if this_card > last_card ...

And what about prompt()? It will probably look something like:

sub prompt:
   ask user to enter H or L
   read in input
   chomp off newline
   uppercase input
   default input to H unless it is H or L
   return input
end sub

my @card_precedence = ('A',2..10,'J','Q','K');

# we will also need suites
my @suite_precedence = qw(clubs diamonds hearts spades);

(update) WARNING: SPOILERS! (click and cheat)

(note that the update is for the warning, not the code within - i want to give a better warning, but i didn't want to invalidate castaway's reply. castaway++ please read this before you click vote, eh?)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

<rant>

Sorry, but I feel I have to downvote this.. If it was me that had asked the question, I'd be pretty peeved at someone trying to solve it for me.. (Especially if my point was to try and learn something for myself.) Suggestions and pointing out errors I can understand.. But actually writing the code.. *shakes her head* ..

.oO( And then there are the posts that actually *want* code, and nobody provides any, because they should 'do it themselves'.. I don't get it..)

</rant>

C.

You seem to be complaining that jeffa wrote some code. Well, yes he did, but he also did a good job with the pseudo code (as the OP requested). If you really want to write the code yourself you still can. Yes jeffa provided some code but you don't have to use it do you? I mean you can still take a stab at writing it yourself using your pseudo code as a guide surely. Am I missing something?

-- vek --

I will have to agree with castaway on this, it's not that I don't appreciate all the help and work you must have put into it for such a reply but I don't exactly like the idea the entire problem is solved and layed out before me before I get my first verison done. I'm not going to take your code but there are parts in there that helped some of my mind boggling questions (like how would I use card hierarchy (this had me really stumped!) ).

From this I think I have a good idea of what I have to do to get going, thanks so much for your help!

"Age is nothing more than an inaccurate number bestowed upon us at birth as just another means for others to judge and classify us"

sulfericacid

jeffa has every right of answering your question to the best of his abilities.

You are complaining that he told you too much?

merlyn was right!

A few questions to ponder.

What happens when the pack runs out?

Do you want to re-shuffle the pack each time the user make a guess or shuffle once at the start and then just take the next card each time?

If the next card has the same value as the current card, does the user always win or always lose?

Your textual description is shuffle a deck of cards and take the top card, then prompt to the user if the next card will be higher or lower than this card, after they answer the next card in the deck is shown, if the user was right the program will loop and flip another first card over..ask them again... but if they get it wrong the program exits.

Breaking this up into steps you get

shuffle a deck of cards
and take the top card,
then prompt to the user if the next card will be higher or lower than 
+this card,
after they answer the next card in the deck is shown,
if the user was right the program will loop and flip another first car
+d over..ask them again...
but if they get it wrong the program exits.
[download]

Prodding this around a bit I get

Shuffle deck;
pop top card
while( cards_left ) {
    show card
    prompt Higher or Lower?
    Get answer
     next_card = pop cards
    last unless next_card > top_card and answer = Higher
         or     next_card < top_card and answer = Lower
    top_card == next_card
}
Game over.
[download]

which is way short of complete, but might be a place to continue from?

Update:Since jeffa let the cat out of the bag below, here's one of my takes on the implementation.

Caveat: The suit symbols will probably be wrong on *nix.

Do you really want to exit the program if they get the card wrong? Sounds like you'll have a lot of very short games to me. A do/while loop is close to a natural fit for this, since you want to execute the shuffle once first before testing, although I think it'll make more sense to move the user input and testing part from the while condition and into the do block.

do {
    shuffle and display card;
    read input;
} while (input correct);
exit(0);
[download]

Of course, since the program as described could be written in so few lines utilizing a shuffling module (e.g., Algorithm::Numerical::Shuffle since it came up earlier today), you might as well use a label and a goto :^)

This is a very popular game in japan, and yes if the answer is wrong they lose, if right they are asked if the want to continue, usually this means a bigger payoff.

Might consider adding:

if ($guess was right)
{
  continue();
}
else
{
  exit;
}

sub continue()
{
   ask user to enter y or n
   read in answer
   chomp answer
   lowercase input #or uppercase I just like lower
   default input to n unless it is y or n  #or y if you were a real hu
+ssler
   return answer
}
[download]

Yes my pseudo code has code in it, just the way I code :). Didn't read merlyn post before posting, so this was not meant as an opinion. My opinion on that is merely that this post asked for pseudo code so I gave pseudo code. Thought this was both because I really don't know who to do this, and I'm just weird.

Update: changed last statment

"Pain is weakness leaving the body, I find myself in pain everyday" -me