四则运算

功能设计：
（1）基础功能：实现四则运算题目的自动生成，并打印出题目的答案
（2）扩展功能：实现菜单操作
4、代码说明：
1 import random
2
3 from fractions import Fraction
4
5 def newint():
6 opr = ['＋', '－', '×', '÷']
7 fh = random.randint(0, 3)
8 n1 = random.randint(1, 20)
9 n2 = random.randint(1, 20)
10 rjg = 0
11 if fh == 0:
12 rjg = n1 + n2
13 elif fh == 1:
14 n1, n2 = max(n1, n2), min(n1, n2)
15 rjg = n1 - n2
16 elif fh == 2:
17 rjg = n1 * n2
18 elif fh == 3:
19 n1, n2 = max(n1, n2), min(n1, n2)
20 while n1 % n2 != 0:
21 n1 = random.randint(1, 10)
22 n2 = random.randint(1, 10)
23 n1, n2 = max(n1, n2), min(n1, n2)
24 rjg = int(n1 / n2)
25 print(n1, opr[fh], n2, '= ', end='')
26 return rjg
27
28
29
30 def newfra():
31 opr = ['＋', '－', '×', '÷']
32 fh = random.randint(0, 3)
33 t1 = random.randint(1, 10)
34 t2 = random.randint(t1, 10)
35 n1 = Fraction(t1, t2)
36 t1 = random.randint(1, 10)
37 t2 = random.randint(t1, 10)
38 n2 = Fraction(t1, t2)
39 rjg = 0
40 if fh == 0:
41 rjg = n1 + n2
42 elif fh == 1:
43 n1, n2 = max(n1, n2), min(n1, n2)
44 rjg = n1 - n2
45 elif fh == 2:
46 rjg = n1 * n2
47 elif fh == 3:
48 n1, n2 = max(n1, n2), min(n1, n2)
49 rjg = n1 / n2
50 print(n1, opr[fh], n2, '= ', end='')
51 return rjg
52
53 def newtest():
54 opr = ['＋', '－', '×', '÷']
55 print('输入题库所需要的题目数量')
56 n=int(input())
57 rjg=[]
58 m=0
59 while m<=(n-1):
60 fh = random.randint(0, 4)
61 if fh0:
62 print(m+1,end='、')
63 rjg.append(newfra())
64 print(' ')
65 else:
66 print(m+1,end='、')
67 rjg.append(newint())
68 print(' ')
69 m=m+1
70 m=0
71 print('答案：')
72 while m<=(n-1):
73 print(m+1,'、',rjg[m])
74 m=m+1
75
76
77
78 print('1、四则运算')
79 print('2、制作题库')
80 n=int(input())
81 if n1:
82 print('input "0000" to Quit')
83 while True:
84 fh = random.randint(0, 4)
85 if fh == 0:
86 rjg = newfra()
87 jg = input()
88 if jg == '0000':
89 break;
90 sr = Fraction(jg)
91 if sr == rjg:
92 print('right')
93 else:
94 print('error. the Tight answer is', rjg)
95 else:
96 rjg = newint()
97 jg = input()
98 if jg == '0000':
99 break;
100 sr = int(jg)
101 if sr == rjg:
102 print('right')
103 else:
104 print('error. the Tight answer is', rjg)
105 if n==2:
106 newtest()
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