Creating VolleyBall game in python [solved]

[prince99]

Q) Design and implement a volleyball simulation. In volleyball, only the serving team can score, and if the receiving team win the rally, they gain the serve. Games are played to a score of 15, but must be won by at least 2 points. If the scores are closer, the game can continue indefinitely.

Code given below plz correct it

#volleyball.py
 
def main ():
    print Intro ()
    probA, probB, n = getInputs ()
    winsA, winsB = simNGames (n, probA, probB)
    printSummary (winsA, winsB)
def Intro ():
    print "This program simulates a gsme of volleyball between"
    print "two players called A and B."
    print "player A always has the first serve"
def getInputs ():
    a = input ("Player A wins a serve")
    b = input ("Player B wins a serve")
    n = input ("How many games do you want to simulate?")
    return a, b, n
def simNGames(n, probA, probB) :
    winsA= winsB = 0
    for i in range(n):
        scoreA, scoreB = simOneGame (probA, probB)
        if scoreA > scoreB:
            winsA =winsA + 1
        else:
            winsB = winB + 1
        return winsA, winsB
def simOneGame (probA, probB):
    serving= "A"
    scoreA = 0
    scoreB = 0
    while not gameOver (scoreA, scoreB):
        if serving == "A":
            if random() < probA:
                scoreA = scoreA + 1
            else:
                serving = "B"
        else:
            if random() < probB:
                    scoreB = scoreB + 1
            else:
                     serving = "A"
 
    return scoreA, scoreB
def gameOver(a, b):
    return a==15 or b==15
def printSummary(winsA, winsB):
    n= winsA + winsB
    print "\nGames simulated", n
    print "Wins for A: %d (%0.1f%%)" % (winsA, float(winsA)/n*100)
 
if __name__ == '__main__':main()

[bartonc]

I won't format you code again!!! USE CODE TAGS!!!

That said, your program look pretty good, but you need to understand the difference between built-in python functions and library modules. For example, print is built-in

>>> print "hello"
hello

random is a module in the library that must be imported.

>>> random()
Traceback (most recent call last):
File "<pyshell#0>", line 1, in -toplevel-
random()
NameError: name 'random' is not defined

actually, you want one of the functions in that library so you can use

from random import randint
for a in range(10):
    print randint(0, 100) 
 

55
12
55
9
70
61
51
53
24
79

In order to satisfy the last part

return (a >= 15 and a > (b + 2)) or (b >= 15 and b > (a+2))
 

should be pretty close

[kudos]

here is some code to get you started...
(but do you really need to write a program to get the answer for this, or would it be simpler to just look up a statistics book????

-kudos

# playes ONE game
# and some def around it to simulate more 
# games..
 
import random, math
 
server = 0
probA = .7
teamA = 0
teamB = 0
 
while(True):
 if(server == 0):
  print "Team A serves!"
  if(random.random() < probA):
   print "Team A wins the serve!"
   teamA+=1
  else:
   server = 1
 else:
  print "Team B serves!"
  if(random.random()>probA):
   print "Team B wins the serve!"
   teamB+=1
  else:
   server = 0
 
 if(teamA >= 15 or teamB >=15):
  if(abs(teamA - teamB) >=2):
   break;
 
 
print "team A : " + str(teamA)
print "team B : " + str(teamB)

Q) Design and implement a volleyball simulation. In volleyball, only the serving team can score, and if the receiving team win the rally, they gain the serve. Games are played to a score of 15, but must be won by at least 2 points. If the scores are closer, the game can continue indefinitely.

Code given below plz correct it

#volleyball.py
 
def main ():
    print Intro ()
    probA, probB, n = getInputs ()
    winsA, winsB = simNGames (n, probA, probB)
    printSummary (winsA, winsB)
def Intro ():
    print "This program simulates a gsme of volleyball between"
    print "two players called A and B."
    print "player A always has the first serve"
def getInputs ():
    a = input ("Player A wins a serve")
    b = input ("Player B wins a serve")
    n = input ("How many games do you want to simulate?")
    return a, b, n
def simNGames(n, probA, probB) :
    winsA= winsB = 0
    for i in range(n):
        scoreA, scoreB = simOneGame (probA, probB)
        if scoreA > scoreB:
            winsA =winsA + 1
        else:
            winsB = winB + 1
        return winsA, winsB
def simOneGame (probA, probB):
    serving= "A"
    scoreA = 0
    scoreB = 0
    while not gameOver (scoreA, scoreB):
        if serving == "A":
            if random() < probA:
                scoreA = scoreA + 1
            else:
                serving = "B"
        else:
            if random() < probB:
                    scoreB = scoreB + 1
            else:
                     serving = "A"
 
    return scoreA, scoreB
def gameOver(a, b):
    return a==15 or b==15
def printSummary(winsA, winsB):
    n= winsA + winsB
    print "\nGames simulated", n
    print "Wins for A: %d (%0.1f%%)" % (winsA, float(winsA)/n*100)
 
if __name__ == '__main__':main()

[bartonc]

Looking up statistics in a book doesn't teach programming.

Looks like you learning! Keep it up! Have fun!

Barton

[kudos]

I only said that one could get the answer for this without doing a simulation.
Do I learn programming? what do you mean?

Looking up statistics in a book doesn't teach programming.

Looks like you learning! Keep it up! Have fun!

Barton

[bartonc]

I only said that one could get the answer for this without doing a simulation.
Do I learn programming? what do you mean?

Sorry, I didn't notice that you had jumped in on this thread. I was writing to the original poster of this thread. Thanks for keeping an eye on this forum and contributing. We need all the help we can get!
Barton

[prince99]

if(teamA >= 15 or teamB >=15):
if(abs(teamA - teamB) >=2):
break;

this code is not working, because the qestion says that the teams should be loss by only 2 points, but result goes other way. The program wins the game for team A but it wins by many points

i want to get something like if the winning team scored 15 and win the other team should atleast score 13. it will make 2 points different only.

any help?

thanx

Prince

[bartonc]

if(teamA >= 15 or teamB >=15):
if(abs(teamA - teamB) >=2):
break;

this code is not working, because the qestion says that the teams should be loss by only 2 points, but result goes other way. The program wins the game for team A but it wins by many points

i want to get something like if the winning team scored 15 and win the other team should atleast score 13. it will make 2 points different only.

any help?

thanx

Prince

Prince, Please start using code tags - READ THE STICKY (first post) at the top of this forum - so your post looks like this:

if(teamA >= 15 or teamB >=15):
    if(abs(teamA - teamB) >=2):
        break;
 

I ran the code that kudos gave you with probA = .5. It works for me.
Thanks for using code tags in your next post,
python forum moderator,
Barton

[kudos]

Didn't you say that one of the teams should win by atleast two points? Also, isn't it a bit odd (as a game) the constraint that the winning team should have 15 points, and the loosing team should have no less than 13 points?

-kudos

if(teamA >= 15 or teamB >=15):
if(abs(teamA - teamB) >=2):
break;

this code is not working, because the qestion says that the teams should be loss by only 2 points, but result goes other way. The program wins the game for team A but it wins by many points

i want to get something like if the winning team scored 15 and win the other team should atleast score 13. it will make 2 points different only.

any help?

thanx

Prince

[prince99]

yes that's right but i dunno some how its not working correctly, but anyway guys thanx for your help and time. I really appreciate you guys help

i got a better idea now and will try to solve it out

thanx a lot