小学四则运算题

  1 from fractions import Fraction   #fraction:分数，即在此导入分数模块
  2 import random      #用于随机生成题目
  3 
  4 #整数四则运算
  5 def newint():
  6     fh = [‘＋‘, ‘－‘, ‘ב, ‘÷‘]
  7     k = random.randint(0, 3)  #随机生成0到3内的整数,用于fh的下标
  8     n1 = random.randint(0, 100)
  9     n2 = random.randint(0, 100)
 10     result = 0   #存运算结果
 11     if k == 0:
 12         result = n1 + n2
 13     elif k == 1:
 14         n1, n2 = max(n1, n2), min(n1, n2)
 15         result = n1 - n2
 16     elif k == 2:
 17         result = n1 * n2
 18     elif k == 3:
 19         while n2 == 0 or float(n1/n2)*1000%10!=0:  #分母不能为0,运算结果控制在2位小数内。
 20             n1 = random.randint(0, 100)
 21             n2 = random.randint(0, 100)
 22         result = float(n1 / n2)
 23     print(n1, fh[k], n2, ‘= ‘, end=‘‘)
 24     return result
 25 
 26 #分数四则运算
 27 def newfra():
 28     fh = [‘＋‘, ‘－‘, ‘ב, ‘÷‘]
 29     k = random.randint(0, 3)
 30     t1 = random.randint(1,20)
 31     t2 = random.randint(t1, 20)  #做分母，控制为真分数
 32     n1 = Fraction(t1, t2)   #即表示n1为分数
 33     t1 = random.randint(1, 20)
 34     t2 = random.randint(t1, 20)
 35     n2 = Fraction(t1, t2)
 36     result = 0
 37     if k == 0:
 38         result = n1 + n2
 39     elif k == 1:
 40         n1, n2 = max(n1, n2), min(n1, n2)
 41         result = n1 - n2
 42     elif k == 2:
 43         result = n1 * n2
 44     elif k == 3:
 45         result = n1 / n2
 46     print(n1, fh[k], n2, ‘= ‘, end=‘‘)
 47     return result
 48 
 49 #newtest()函数是要求用户输入一个整数来输出算式的数量，采用while循环随机生成整数或者真分数运算，
 50 # 将答案保存在result列表的同时输出算式直到算式数量达到要求。最后输出result列表即输出答案。
 51 def newtest():
 52     fh = [‘＋‘, ‘－‘, ‘ב, ‘÷‘]
 53     print(‘输入题库所需要的题目数量‘)
 54     n=int(input())
 55     result=[]
 56     m=0
 57     while m<=(n-1):
 58         k = random.randint(0, 4)
 59         if k==0:
 60             print(m+1,end=‘、‘)
 61             result.append(newfra())
 62             print(‘ ‘)
 63         else:
 64             print(m+1,end=‘、‘)
 65             result.append(newint())
 66             print(‘ ‘)
 67         m=m+1
 68     m=0
 69     print(‘答案：‘)
 70     while m<=(n-1):
 71         print(m+1,‘、‘,result[m])
 72         m=m+1
 73 
 74 #下列为主函数，第一个模式负责调用上述newint()、new函数，
 75 # 并获得函数返回值即算式答案，与用户输入值进行比较。第二个模式则是生成算式题目。
 76 print(‘请选择需要进行的操作（输入数字代号）‘)
 77 print(‘1、四则运算‘)
 78 print(‘2、制作题库‘)
 79 n=int(input())
 80 if n==1:
 81     print(‘input "exit" to Quit‘)
 82     while True:
 83         k = random.randint(0, 1)  #0表示真分数的运算，1表示整数的运算
 84         if k == 0:
 85             result = newfra()
 86             jg = input()
 87             if jg == ‘exit‘:
 88                 break;
 89             sr = Fraction(jg)  #化为分数形式
 90             if sr == result: #检测输入（sr）的答案与正确答案是否一致
 91                 print(‘right‘)
 92             else:
 93                 print(‘error. the Tight answer is‘, result)
 94         else:
 95             result = newint()
 96             jg = input()
 97             if jg == ‘exit‘:
 98                 break;
 99             sr = float(jg)
100             if sr == result:
101                 print(‘right‘)
102             else:
103                 print(‘error. the Tight answer is‘, result)
104 if n==2:
105     newtest()