I would like to demonstrate what kind of approach we have established when
dealing with problems/programs such as what you need to do for Homework Two.
We discussed this before, for example:
http://www.cs.indiana.edu/classes/a348/fall2009/lec0922.txt
------------------------------------------(this was the basic addition quiz)----------------
Task: http://www.cs.indiana.edu/classes/a202-dger/fall2009/lab0925.txt
------------------------------------------(this was just the definition and prototype of the war game)-------
So we will implement a game of cards I guess let's play with its prototype.
Notes, clarifying what we wrote last week:
-- initially the deck is 52 cards, shuffled
-- deckOne is mine, deckTwo is Jake's, empty in the beginning
-- we draw cards in cardOne, cardTwo: these are cards, not decks
I start with a sketch of the output:
----------------------------------(sample output)---------
Welcome to the game.
The deck is shuffled, take a look: [deck]
Dilbert: [deckOne]
Ratbert: [deckTwo]
Press to start the game.
----------------------------------------------------------
That's a good start, let's work on it some more:
----------------------------------(sample output)---------
[feedback]
The deck is shuffled, take a look: [deck]
[scoreOne] Dilbert: [handOne] [deckOne]
[scoreTwo] Ratbert: [handTwo] [deckTwo]
Press to start the game.
----------------------------------------------------------
The [feedback] is "Welcome to the game" originally, later is grading info.
My overall template is like this:
1. program starts
2. picks up the phone and presses the right buttons
3. reads the input
4. provides the answer
5. hangs up
This is how Apache, the web, http forces you to behave.
It's an event driven, connectionless web.
But we need to keep the state, so the exact same program should act like this too:
1. retrieve state (and input)
2. if state is empty:
initialize state
else:
update state based on input
3. save state
4. report state
5. get ready for more input
You can put these two requirements together as follows:
#!/usr/bin/python
print "Content-type: text/html\n\n"
import cgi
data = cgi.FieldStorage()
if data.has_key("balance"):
balance = data["balance"].value
else:
balance = "0"
balance = str(int(balance) + 1)
print """
""" % (balance, balance)
Like here:
http://www.cs.indiana.edu/classes/a348/fall2009/lec0922.html
(See step 1 in the notes above).
Or here:
http://silo.cs.indiana.edu:8346/
Under:
http://silo.cs.indiana.edu:8346/hwTwo.html
There's a program:
http://silo.cs.indiana.edu:8346/cgi-bin/hwTwo
And the source code is posted too:
http://silo.cs.indiana.edu:8346/hwTwo.txt
This is just like in the quiz of last week.
Try the program above at this link:
http://silo.cs.indiana.edu:8346/cgi-bin/jlmarsh
Now, let's move on.
So we start developing ~/apache/cgi-bin/war001
#!/usr/bin/python
print "Content-type: text/html\n\n"
import cgi
data = cgi.FieldStorage()
(deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo, feedback) = ("", "", "", "", "", "", "", "")
if data.has_key("deck"): deck = data["deck"].value
if data.has_key("deckOne"): deckOne = data["deckOne"].value
if data.has_key("deckTwo"): deckTwo = data["deckTwo"].value
if data.has_key("handOne"): handOne = data["handOne"].value
if data.has_key("handTwo"): handTwo = data["handTwo"].value
if data.has_key("scoreOne"): scoreOne = data["scoreOne"].value
if data.has_key("scoreTwo"): scoreTwo = data["scoreTwo"].value
if deck:
pass
else:
feedback = "Welcome to the game."
print """
""" % (feedback, deck, scoreOne, handOne, deckOne, scoreTwo, handTwo, deckTwo, deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo)
From here on we have to specifically initialize the state, and this is where
we would look at the prototype:
#!/usr/bin/python
print "Content-type: text/html\n\n"
import cgi, random
data = cgi.FieldStorage()
(deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo, feedback) = ("", "", "", "", "", "", "", "")
if data.has_key("deck"): deck = data["deck"].value
if data.has_key("deckOne"): deckOne = data["deckOne"].value
if data.has_key("deckTwo"): deckTwo = data["deckTwo"].value
if data.has_key("handOne"): handOne = data["handOne"].value
if data.has_key("handTwo"): handTwo = data["handTwo"].value
if data.has_key("scoreOne"): scoreOne = data["scoreOne"].value
if data.has_key("scoreTwo"): scoreTwo = data["scoreTwo"].value
if deck:
pass
else:
feedback = "Welcome to the game."
deck = []
for i in range(13):
for j in range(4):
deck.append(str(i))
random.shuffle(deck)
deck = ",".join(deck)
print """
""" % (feedback, deck, scoreOne, handOne, deckOne, scoreTwo, handTwo, deckTwo, deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo)
Let's finish the initialization and set up the basic processing:
#!/usr/bin/python
print "Content-type: text/html\n\n"
import cgi, random
data = cgi.FieldStorage()
(deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo, feedback) = ("", "", "", "", "", "", "", "")
if data.has_key("deck"): deck = data["deck"].value
if data.has_key("deckOne"): deckOne = data["deckOne"].value
if data.has_key("deckTwo"): deckTwo = data["deckTwo"].value
if data.has_key("handOne"): handOne = data["handOne"].value
if data.has_key("handTwo"): handTwo = data["handTwo"].value
if data.has_key("scoreOne"): scoreOne = data["scoreOne"].value
if data.has_key("scoreTwo"): scoreTwo = data["scoreTwo"].value
if deck:
deck = deck.split(",")
deckOne = deckOne.split(",")
deckTwo = deckTwo.split(",")
handOne = deck[0]
handTwo = deck[1]
deckOne[0:0] = [handOne]
deckTwo[0:0] = [handTwo]
deck = deck[2:]
deck = ",".join(deck)
deckOne = ",".join(deckOne)
deckTwo = ",".join(deckTwo)
else:
feedback = "Welcome to the game."
deck = []
for i in range(13):
for j in range(4):
deck.append(str(i))
random.shuffle(deck)
deck = ",".join(deck)
scoreOne = "0"
scoreTwo = "0"
print """
""" % (feedback, deck, scoreOne, handOne, deckOne, scoreTwo, handTwo, deckTwo, deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo)
Finally, we add the rules of the game:
#!/usr/bin/python
def sum(los):
if len(los) == 0:
return 0
else:
try:
value = int(los[0]) + sum(los[1:])
except:
value = sum(los[1:])
return value
print "Content-type: text/html\n\n"
import cgi, random
data = cgi.FieldStorage()
(deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo, feedback) = ("", "", "", "", "", "", "", "")
if data.has_key("deck"): deck = data["deck"].value
if data.has_key("deckOne"): deckOne = data["deckOne"].value
if data.has_key("deckTwo"): deckTwo = data["deckTwo"].value
if data.has_key("handOne"): handOne = data["handOne"].value
if data.has_key("handTwo"): handTwo = data["handTwo"].value
if data.has_key("scoreOne"): scoreOne = data["scoreOne"].value
if data.has_key("scoreTwo"): scoreTwo = data["scoreTwo"].value
if deck:
deck = deck.split(",")
deckOne = deckOne.split(",")
deckTwo = deckTwo.split(",")
handOne = deck[0]
handTwo = deck[1]
if int(handOne) > int(handTwo):
deckOne[0:0] = [handOne]
deckOne[0:0] = [handTwo]
feedback = "(%s, %s) Dilbert's hand" % (handOne, handTwo)
elif int(handTwo) > int(handOne):
deckTwo[0:0] = [handOne]
deckTwo[0:0] = [handTwo]
feedback = "(%s, %s) Ratbert's hand" % (handOne, handTwo)
else:
deckOne[0:0] = [handOne]
deckTwo[0:0] = [handTwo]
feedback = "(%s, %s) Tie" % (handOne, handTwo)
scoreOne = sum(deckOne)
scoreTwo = sum(deckTwo)
deck = deck[2:]
deck = ",".join(deck)
deckOne = ",".join(deckOne)
deckTwo = ",".join(deckTwo)
else:
feedback = "Welcome to the game."
deck = []
for i in range(13):
for j in range(4):
deck.append(str(i))
random.shuffle(deck)
deck = ",".join(deck)
scoreOne = "0"
scoreTwo = "0"
print """
""" % (feedback, deck, scoreOne, handOne, deckOne, scoreTwo, handTwo, deckTwo, deck, deckOne, deckTwo, handOne, handTwo, scoreOne, scoreTwo)
Find this working at
http://silo.cs.indiana.edu:8346/cgi-bin/war004
It's easy to add images now.
We also need to detect the end of the game and start a new game.