比赛模拟-排球

 

# 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()