def craps(n): # import the library import random # main program starts here probability = 0 finish = 0 win = 0 for i in range(0, n): finish = 0 firsttime = 1 # beginining of a game while (finish == 0): value = random.randrange(1, 13) if firsttime == 1: # execute this part when the dice is thrown the first time if value == 7 or value == 11: # print "You win." finish = 1 win = win + 1 elif value == 2 or value == 3 or value == 12: # print "You lose." finish = 1 firsttime = 0 initial_value = value else: # execute this part when the dice is thrown after the frist time if value == 7: # print "You lose." finish = 1 elif value == initial_value: # print "You win." finish = 1 win = win + 1 # end of a game

end of n games

return win

def main(): print craps(500) / 500.0 if name == 'main': main()

Doctest File:

from game_simulation_partnerA_partnerB import *

General Case #1:

w = craps(500) 200 < w and w < 300 True

General Case #2:

w = craps(1000) 300 < w and w < 500 True

Unusual Case #1: Negative Number of Games

craps(-2) 0