预计球队比赛成绩

预计球赛比赛成绩

 

 

 

 

 

 

 

 （一）模拟体育竞技分析

　　b.排球比赛

　　

    
from random import random
def printIntro():   
    print('这个程序模拟两个队伍A和B的排球竞技比赛')
    print('程序运行需要A和B的能力值(以0到1之间的小数表示)')
def getInputs():   
    a = eval(input('请输入队伍A的能力值(0-1):'))
    b = eval(input('请输入队伍B的能力值(0-1):'))
    n = eval(input('模拟比赛场次:'))
    return a, b, n
def simNGames(n, probA, probB):  
    winsA, winsB = 0, 0    
    for i in range(n):
        scoreA, scoreB=simOneGame(probA, probB)
        if scoreA==1:
            winsB+=1
            continue
        elif scoreA==3:
            winsA+=1
            continue
        scoreA, scoreB = simOneGame5(probA, probB)
        if scoreA > scoreB:
            winsA += 1
        else:
            winsB += 1
    return winsA, winsB
def simOneGame5(probA, probB):  
    scoreA, scoreB =0, 0
    serving = 'A'
    while not gameOver5(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 simOneGame(probA, probB):
    scoreA, scoreB = 0, 0
    for i in range(4):
        s1, s2=0, 0
        while not gameOver(s1, s2):
            if random()<probA:
                s1+=1
            elif random()<probB:
                s2+=1
        if s1>s2:
            scoreA+=1
        else:
            scoreB+=1
    return scoreA, scoreB
def gameOver5(c, d):    
    return (c>=15 and c-d>=2) or (d>=15 and d-c>=2)
def gameOver(scoreA, scoreB):
    return (scoreA>=25 and scoreA-scoreB>=2) or (scoreB>=25 and scoreB-scoreA>=2)
def printSummary(n,winsA, winsB):
    print("竞技分析开始，共模拟{}场比赛".format(n))
    print("选手A获胜{}场比赛，占比{:0.1%}".format(winsA, winsA/n))
    print("选手B获胜{}场比赛，占比{:0.1%}".format(winsB, winsB/n))
def main():
    printIntro()
    probA, probB,n= getInputs()
    winsA, winsB = simNGames(n, probA, probB)
    printSummary(n,winsA, winsB)
main()