四则运算(Python)

这个作业属于哪个课程 https://edu.cnblogs.com/campus/ahgc/AHPU-SE-19
这个作业要求在哪里 https://www.cnblogs.com/hhyisgod/p/13888498.html
这个作业的目标 使用工具来实现四则运算并且提高对需求分析的理解和掌握
学号 3190704131
import random

from fractions import Fraction
operation = ['+', '-', '*', '/'] #四则运算的符号
global f

def integer_score():
number = random.randint(1,4) #随机产生的表达式长度
f = ''
for i in range(number):
a = random.randint(1,20) #随机产生的表达式中的数
rand = operation[random.randint(0, 3)] #随机选择一个符号
if rand == '/':
b = random.randint(a, 20) #随机产生的真分数的分母
f += str(a) + rand + str(b)
rand = operation[random.randint(0, 2)] #随机选择一个符号
f += rand
else:
f += str(a) + rand
b = random.randint(1, 20)
f += str(b) #得到完整的表达式
n = eval(f) #得到表达式的结果
n = Fraction('{}'.format(n)).limit_denominator() #小数转化为分数
if n > 0:
print('题目:')
print(f,'=')
print('请输出答案:')
x = Fraction('{}'.format(eval(input()))).limit_denominator()
if n == x: #输入的数与表达式比较
print(True)
else:
print(False)
print('正确的答案为:',n)
else:
integer_score()

def integer():
# rand = operation[random.randint(0,3)]
number = random.randint(1, 3)
f = ''
for i in range(number):
a = random.randint(1, 10)
rand = operation[random.randint(0, 3)]
f += str(a) + rand
b = random.randint(1, 10)
f += str(b)
n = eval(f)
if isinstance(n, int) and n > 0:
print('题目:')
print(f, '=')
print('请输出答案:')
x = eval(input())
if n == x:
print(True)
else:
print(False)
print('正确的答案为:', n)
else:
integer()

def score():
op = ['+', '-']
number = random.randint(1, 3)
f = ''
for i in range(number):
a = random.randint(1, 10)
b = random.randint(a, 10)
rand = op[random.randint(0, 1)]
f += str(a) + '/'+ str(b)+rand

a = random.randint(1, 10)
b = random.randint(a, 10)
f += str(a) + '/'+ str(b)
n = eval(f)
n = Fraction('{}'.format(n)).limit_denominator()

if n > 0:
    print('题目:')
    print(f,'=')
    print('请输出答案:')
    x = Fraction('{}'.format(eval(input()))).limit_denominator()
    if n == x:
        print(True)
    else:
        print(False)
        print('正确的答案为:',n)
else:
    score()

if name == 'main':
while True:
print('选择你想做的题目:')
print('0(退出)1(分数题目),2(整数题目),3(综合题目)')
m = int(input())
if m == 1:
score()
elif m == 2:
integer()
elif m == 3:
integer_score()
elif m == 0:
exit()
else:
print('请重新输入你的选择')

posted on 2020-10-27 23:36  斡識懝鲅魃  阅读(148)  评论(0编辑  收藏  举报

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