排球比赛——预测

赛制规定

前4局比赛采用5局3胜制，每个队只有赢得至少25分，饼统摄超过对方2分时，才胜1局。

正式比赛采用5局3胜制，决胜局的比赛采用15分制，一队先得8分后，两队交换场区，按照原位置顺序继续比赛到结束。

在决胜局（第五局）之比赛，先获得15分并领先对方2分为胜利。

 1 from random import random
 2  
 3 def printIntro():    # 打印程序介绍信息
 4     print("2019310143026 马晓嘉")
 5     print('这个程序模拟两个队伍A和B的排球竞技比赛')
 6     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)')
 7  
 8 def getInputs():    # 获得程序运行参数
 9     a = eval(input('请输入队伍A的能力值(0-1):'))
10     b = eval(input('请输入队伍B的能力值(0-1):'))
11     n = eval(input('模拟比赛场次:'))
12     return a, b, n
13  
14 def simOneGame(probA, probB):    # 进行决赛
15     scoreA, scoreB =0, 0
16     serving = 'A'
17     while not gameOver(scoreA, scoreB):
18         if serving == 'A':
19             if random() > probA:
20                 scoreB += 1
21                 serving = 'B'
22             else:
23                 scoreA += 1
24         else:
25             if random() > probB:
26                 scoreA += 1
27                 serving = 'A'
28             else:
29                 scoreB += 1
30     return scoreA, scoreB
31     
32 def simfirstgame(probA, probB):
33     scoreA, scoreB = 0, 0
34     for i in range(4):
35         s1, s2=0, 0
36         while not gameover(s1, s2):
37             if random()<probA:
38                 s1+=1
39             elif random()<probB:
40                 s2+=1
41         if s1>s2:
42             scoreA+=1
43         else:
44             scoreB+=1
45     return scoreA, scoreB
46 
47 def simNGames(n, probA, probB):    #进行N场比赛
48     winsA, winsB = 0, 0    # 初始化AB的胜场数
49     for i in range(n):
50         k, l=simfirstgame(probA, probB)
51         if k==1:
52             winsB+=1
53             continue
54         elif k==3:
55             winsA+=1
56             continue
57         scoreA, scoreB = simOneGame(probA, probB)
58         if scoreA > scoreB:
59             winsA += 1
60         else:
61             winsB += 1
62     return winsA, winsB
63  
64 def gameOver(c, d):    #比赛结束
65     return (c>=15 and c-d>=2) or (d>=15 and d-c>=2)
66 def gameover(scoreA, scoreB):
67     return (scoreA>=25 and scoreA-scoreB>=2) or (scoreB>=25 and scoreB-scoreA>=2)
68 
69  
70 def printSummary(n ,winA, winB):    #打印比赛结果
71     print('竞技分析开始，共模拟{}场比赛'.format(n))
72     print('队伍A获胜{}场比赛，占比{:.2f}%'.format(winA, winA/n*100))
73     print('队伍B获胜{}场比赛，占比{:.2f}%'.format(winB, winB / n * 100))
74 def main():
75     printIntro()
76     probA, probB, n =getInputs()
77     winsA, winsB = simNGames(n, probA, probB)
78     printSummary(n, winsA, winsB)
79  
80 main()
81 
82 def GameOver(N,scoreA,scoreB):
83     if N<=4:
84           return(scoreA>=25 and scoreB>=25 and abs(scoreA-scoreB)>=2)
85     else:
86           return(scoreA>=15 and abs(scoreA-scoreB)>=2) or (scoreB>=15 and abs(scoreA-scoreB)>=2)
87 ai=[]
88 bi=[]
89 try:
90     for scoreA,scoreB in ((1,25),(1,26),(25,25),(16,17),(28,30)):
91         if GameOver(scoreA,scoreB):
92             ai.append(scoreA)
93             bi.append(scoreB)
94 except:
95     print('Error')
96 
97 print(ai)
98 print(bi)

View Code

结果如下