预测体育竞技比赛结果（新人练手）

一、模拟体育比赛分析

         例：乒乓球设规则如下：

         一局比赛中： 先赢得11分为胜 10平后  先多赢得2分为胜

         单打淘汰赛 ：7句4胜

       代码如下

 1 # -*- coding: utf-8 -*-
 2 """
 3 Created on Wed May 15 11:38:02 2019
 4 
 5 @author: lenovo
 6 """
 7 
 8 import random
 9 import math
10 def printIntro():
11     print("这个程序模拟量个选手A和B的乒乓球比赛")
12     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）")
13     print("作者：呆。   （02）")
14 def getInputs():
15     a = eval(input("请输入选手A的能力值（0-1）: "))
16     b = eval(input("请输入选手B的能力值（0-1）: "))
17     n = eval(input("模拟比赛的场次: "))
18     return a, b, n
19  
20 def printSummary(winsA, winsB):
21     n = winsA + winsB
22     print("竞技分析开始， 共模拟{}场比赛".format(n))
23     print("选手A获胜{}场比赛， 占比{:0.1%}".format(winsA, winsA/n))
24     print("选手B获胜{}场比赛， 占比{:0.1%}".format(winsB, winsB/n))
25  
26 def gameOver(a, b):
27     return (a==11 and b<10) or (b==11 and a<10) or (a>=10 and b>=10 and math.fabs(a-b)==2)
28     
29 def simoneGame(probA, probB):
30     scoreA, scoreB = 0, 0
31     if random.random() < 0.5:
32         serving = "A"
33     else :
34         serving = "B"
35     while not gameOver(scoreA, scoreB):
36         if serving == "A":
37             if random.random() < probA:
38                 scoreA += 1
39             else:
40                 serving = "B"
41         else:
42             if random.random() < probB:
43                 scoreB += 1
44             else:
45                 serving = "A"
46     return scoreA, scoreB
47 def simOneGame(probA, probB):
48     winsA, winsB = 0, 0
49     for i in range(7):
50         scoreA, scoreB = simoneGame(probA, probB)
51         if scoreA > scoreB:
52             winsA += 1
53         else:
54             winsB += 1
55     return winsA, winsB
56 def simNGames(n ,probA, probB):
57     winsA, winsB = 0, 0
58     for i in range(n):
59         scoreA, scoreB = simOneGame(probA, probB)
60         if scoreA > scoreB:
61             winsA += 1
62         else:
63             winsB += 1
64     return winsA, winsB
65  
66 def main():
67     printIntro()
68     probA, probB, n = getInputs()
69     winsA, winsB = simNGames(n, probA, probB)
70     printSummary(winsA, winsB)
71 main()

结果如下：