乒乓球 2019310143104

Posted 2021-02-28 hhh12

from random import random
 
def printIntro():    # 打印程序介绍信息
    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():    # 获得程序运行参数
    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 simOneGame(probA, probB):    # 进行决赛
    scoreA, scoreB =0, 0
    serving = ‘A‘
    while not gameOver(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 simfirstgame(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 simNGames(n, probA, probB):    #进行N场比赛
    winsA, winsB = 0, 0    # 初始化AB的胜场数
    for i in range(n):
        k, l=simfirstgame(probA, probB)
        if k==1:
            winsB+=1
            continue
        elif k==3:
            winsA+=1
            continue
        scoreA, scoreB = simOneGame(probA, probB)
        if scoreA > scoreB:
            winsA += 1
        else:
            winsB += 1
    return winsA, winsB
 
def gameOver(c, d):    #比赛结束
    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 ,winA, winB):    #打印比赛结果
    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{:.2f}%‘.format(winA, winA/n*100))
    print(‘队伍B获胜{}场比赛，占比{:.2f}%‘.format(winB, winB / n * 100))
def main():
    printIntro()
    probA, probB, n =getInputs()
    winsA, winsB = simNGames(n, probA, probB)
    printSummary(n, winsA, winsB)
 
main()