小学四则运算编程实践

 1 import random#导入随机库
 2 from fractions import Fraction#导入分数运算
 3 ##整数运算
 4 def c1(q, ans):
 5     operator = random.choice([‘+‘, ‘-‘, ‘*‘, ‘/‘])  # 生成运算符
 6     if operator == ‘+‘:
 7         n1 = random.randint(0, 10)
 8         n2 = random.randint(0, 10)
 9         q.append(str(n1) + ‘+‘ + str(n2) + ‘=‘)
10         ans.append(n1 + n2)
11     elif operator == ‘-‘:
12         n1 = random.randint(0, 10)
13         n2 = random.randint(0, 10)
14         n1, n2 = max(n1, n1), min(n1, n2)  # 防止出现负数
15         q.append(str(n1) + ‘-‘ + str(n2) + ‘=‘)
16         ans.append(n1 - n2)
17     elif operator == ‘*‘:
18         n1 = random.randint(0, 10)
19         n2 = random.randint(0, 10)
20         q.append(str(n1) + ‘ב + str(n2) + ‘=‘)
21         ans.append(n1 * n2)
22     else:
23         n1 = random.randint(0, 10)
24         n2 = random.randint(1, 10)
25         q.append(str(n1) + ‘÷‘ + str(n2) + ‘=‘)
26         ans.append(Fraction(n1, n2))
27 ##随机生成两个分数,且第二个不为0
28 def createF():
29     fz1 = random.randint(0, 10)
30     fm1 = random.randint(1, 10)
31     f1 = Fraction(fz1, fm1)
32     fz2 = random.randint(1, 10)
33     fm2 = random.randint(1, 10)
34     f2 = Fraction(fz2, fm2)
35     return f1, f2
36 def f(f):  # 分数的转换
37     a = f.numerator  # 分子
38     b = f.denominator  # 分母
39     if a % b == 0:  # 为整数
40         return ‘%d‘ % (a/b)
41     elif a < b:  # 为真分数
42         return ‘%d%s%d‘ % (a, ‘/‘, b)
43     else:  # 为带分数
44         c = int(a/b)
45         a = a - c * b
46         return ‘%d%s%d%s%d‘ % (c, ‘’‘, a, ‘/‘, b)
47 ##分数运算
48 def c2(q, ans):
49     operator = random.choice([‘+‘, ‘-‘, ‘*‘, ‘/‘])
50     f1, f2 = createF()
51     if operator == ‘+‘:
52         f1, f2 = createF()
53         q.append(str(f1)+‘+‘+str(f2)+‘=‘)
54         ans.append(f1+f2)
55     elif operator == ‘-‘:
56         f1, f2 = max(f1, f2), min(f1, f2)  # 防止出现负数
57         q.append(str(f1)+‘-‘+str(f2)+‘=‘)
58         ans.append(f1-f2)
59     elif operator == ‘*‘:
60         f1, f2 = createF()
61         q.append(str(f1)+‘ב+str(f2)+‘=‘)
62         ans.append(f1*f2)
63     else:
64         f1, f2 = createF()
65         q.append(str(f1)+‘÷‘+str(f2)+‘=‘)
66         ans.append(Fraction(f1, f2))
67 def main():
68     while 1:
69         k = 10
70         p = 10
71         s = 0
72         q = []
73         ans = []
74         ans2 = []
75         for i in range(k):
76             n = random.randint(1, 4)
77             if n == 1:
78                 c1(q, ans)
79                 g = Fraction(ans[i])
80                 ans2.append(f(g))
81             else:
82                 c2(q, ans)
83                 g = Fraction(ans[i])
84                 ans2.append(f(g))  # 记录带分数答案
85         for i in range(k):
86             print("第{}题：{}".format(i + 1, q[i]), end="  ")
87             a = input()
88             if a == str(ans[i]):
89                 s = s + p
90         print("所得的分数为：{}".format(s))
91         print("正确答案：", end="  ")
92         for i in range(k):
93             if str(ans[i]) == str(ans2[i]):
94                 print(q[i] + str(ans[i]))
95             else:
96                 print("{}{}或{}".format(q[i], str(ans2[i]), str(ans[i])))
97 if __name__ == ‘__main__‘:
98     main()