模拟体育竞技

from random import random

#打印程序介绍信息

def printintro():

    print("这个程序模拟两个选手a和b的乒乓球比赛")

    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)")

#获得程序运行参数

def printinputs():

    a = eval(input("请输入选手a的能力值(0-1): "))

    b = eval(input("请输入选手b的能力值(0-1): "))

    n = eval(input("模拟比赛的场次: "))

    return a, b, n

# 进行n场比赛

def simngames(n, proba, probb):

    winsa, winsb = 0, 0

    for i in range(n):

        for j in range(7): #进行7局4胜的比赛

            scorea, scoreb = simonegame(proba, probb)

            if scorea > scoreb:

                winsa += 1

            else:

                winsb += 1

    return winsa,winsb

#进行一场比赛

def simonegame(proba, probb):

    scorea, scoreb = 0, 0 #初始化ab的得分

    serving = "a"

    while not gameover(scorea, scoreb): #用while循环来执行比赛

        if scorea==10 and scoreb==10:

            return(simonegame2(proba,probb))

        if serving == "a":

            if random() < proba: ##用随机数生成胜负

                scorea += 1

            else:

                serving="b"

        else:

            if random() < probb:

                scoreb += 1

            else:

                serving="a"

    return scorea, scoreb

def simonegame2(proba,probb):

    scorea,scoreb=10,10

    serving = "a"

    while not gameover2(scorea, scoreb):

        if serving == "a":

            if random() < proba:

                scorea += 1

            else:

                serving="b"

        else:

            if random() < probb:

                scoreb += 1

            else:

                serving="a"

    return scorea, scoreb

#比赛结束

def gameover(a,b): #正常比赛结束

    return a==11 or b==11

def gameover2(a,b): #进行抢12比赛结束

    if abs((a-b))>=2:

        return a,b

#输出数据

def printsummary(winsa, winsb):

    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))

#主体函数

def main():

    printintro()

    proba, probb, n = printinputs()

    winsa, winsb = simngames(n, proba, probb)

    printsummary(winsa, winsb)

main()

# 进行n场比赛

def simngames(n, proba, probb):

    winsa, winsb = 0, 0

    for i in range(n):

        for j in range(5): #进行5局3胜的比赛

            scorea, scoreb = simonegame(proba, probb)

            if scorea > scoreb:

                winsa += 1

            else:

                winsb += 1

    return winsa,winsb