比赛规则：
1. 采用5局3胜制
2. 前四局采用25分制，每个队只有在赢得至少25分，且同时超过对方2分时才胜一局
3. 决胜局(第五局)采用15分制，先获得15分，且同时超过对方2分为胜
from random import random
from time import time
def printInfo():
print("排球")
print("通过输入2个队伍A和B的能力值(0到1之间的小数表示)，能够模拟多次2个队伍A和B的排球竞技比赛，从而得出各自的胜率！")
print("姓名：黄尚越")
print("学号：36")
def getInputs():
probA = eval(input("请输入队伍A的能力值(0~1)："))
probB = eval(input("请输入队伍B的能力值(0~1)："))
n = eval(input("请输入需要模拟比赛的场次数："))
return probA, probB, n
def simNGames(n, probA, probB):
winsA, winsB = 0, 0
for _ in range(n):
winA, winB = simOneGame(probA, probB)
if winA > winB:
winsA += 1
else:
winsB += 1
return winsA, winsB
def simOneGame(probA, probB):
winA, winB = 0, 0
for N in range(5):
scoreA, scoreB = simAGame(N, probA, probB)
if scoreA > scoreB:
winA += 1
else:
winB += 1
if winA == 3 or winB == 3:
break
return winA, winB
def simAGame(N, probA, probB):
scoreA, scoreB = 0, 0
serving = 'A'
while not GameOver(N, scoreA, scoreB):
if serving == 'A':
if random() > probA:
scoreB += 1
serving = 'B'
else:
scoreA += 1
else:
if random() > probB:
scoreA += 1
serving = 'A'
else:
scoreB += 1
return scoreA, scoreB
def GameOver(N, scoreA, scoreB):
if N <= 4:
return (scoreA>=25 and scoreB>=25 and abs(scoreA-scoreB)>=2)
else:
return (scoreA>=15 and abs(scoreA-scoreB)>=2) or (scoreB>=15 and abs(scoreA-scoreB)>=2)
def printResult(n, winsA, winsB):
print("竞技分析开始，共模拟{}场比赛。".format(n))
print(">>>队伍A获胜{}场比赛，占比{:0.1%}".format(winsA,winsA/n))
print(">>>队伍B获胜{}场比赛，占比{:0.1%}".format(winsB,winsB/n))
def main():
printInfo()
probA, probB, n = getInputs()
winsA, winsB = simNGames(n, probA, probB)
printResult(n, winsA, winsB)
main()
