I'm new to Python and I'm working on a craps game. I got the basic code down, but I need to simulate a total of 200 games and track the number of wins. I need a counter in my program, but I can't figure out how to do this. Here's what I have so far:

import random

def roll():
die1 = random.randrange(1,7)
die2 = random.randrange(1,7)
print die1, ", ", die2
total = die1 + die2
return total

def main():
firstTry = roll()

print firstTry

if firstTry == 7 or firstTry == 11:
print "You win!"

elif firstTry == 2 or firstTry == 3 or firstTry == 12:
print "You lose."

else:
i = roll()
print i
while i != firstTry:
if i == 7:
print "You lose."
break
else:
i = roll()
if i == firstTry:
print "You win!"

main()

First, the usual rejoinder: use the '[code=Python ]' and '[/code ]' tags to make your posts look pretty.

Now for the code: why not turn main() into a function called game() that returns True for a win and False for a loss. Then you can run a for loop and add up the True's (which have a value of 1).

Jeff

Hi Jeff,

Thanks for your suggestion, but I figured it out a different way. In my play(n) function, I intialized values for my game counter (k=0) and my wins counter (wins=0). Then for each instance in the program where I would win or lose, I increment k by 1, and each instance where I win a game, I increment wins by 1. In my main() program, I call the play(n) function, and print the return of play(n). Here's my code:

from random import randrange

def play(n):
k = 0
wins = 0
while k <= n:
firsttry = roll()
if firsttry == 7 or firsttry == 11:
wins = wins +1
k = k+1
elif firsttry == 2 or firsttry == 3 or firsttry == 12:
k = k+1
else:
i = roll()
while i != firsttry:
if i == 7:
k = k+1
break
else:
i = roll()
if i == firsttry:
wins = wins+1
k = k+1
while k == n:
break
return wins

def roll():
die1 = randrange(1,7)
die2 = randrange(1,7)
total = die1 + die2
return total

def main():
print "This program simulates a game of craps. By entering "
print "the number of games you wish to play, it will calculate "
print "The number of games won."
print
try:
numGames = input("Enter the number of games to play: ")
if numGames <=0:
print "\nYou must enter a value greater than zero. Please try again."
else:
print "The number of games won is",play(numGames),"out of",numGames
except NameError:
print "\nYou must enter a numeric value. Please try again."
except SyntaxError:
print "\nYou made a syntax error. Please try again."


if __name__ == '__main__':
main()

You'll notice I also added some exception handling in my code for unusual input.

Thanks so much for taking the time to respond.

Carrie