import random
from fractions import Fraction
operation = ['+', '-', '', '/']
global f
question = []
result = []
answer = []
def result_integer(f, m):
try:
n = eval(f)
n = Fraction('{}'.format(n)).limit_denominator() # 把表达式的结果转成分数
if n > 0: # 判断结果是否大于0，否则重新产生表达式
#print('题目：')
question.append(f)
result.append(n)
#print('请输出答案：')
#x = Fraction('{}'.format(eval(input()))).limit_denominator()
else:
integer()
except:
integer(m)
def func_integer(number):
f = ''
ch = []
rand = random.randint(0, 1) #选择内嵌或外嵌括号
if number != 1: #避免一个表达式也产生括号
if rand == 0:
ch.append('(')
op = operation[random.randint(0, 1)]
ch.append(random.randint(1, 10))
ch.append(op)
ch.append(random.randint(1, 10))
ch.append(')')
else:
op = operation[random.randint(0, 3)]
if op == '/':
a = random.randint(1, 10)
ch.append(a)
ch.append(op)
ch.append(random.randint(a, 10))
else:
ch.append(random.randint(1, 10))
ch.append(op)
ch.append(random.randint(1, 10))
else:
op = operation[random.randint(0, 3)]
if op == '/':
a = random.randint(1, 10)
ch.append(a)
ch.append(op)
ch.append(random.randint(a, 10))
else:
ch.append(random.randint(1, 10))
ch.append(op)
ch.append(random.randint(1, 10))
for i in ch: #把产生表达式当成一个整体
f += str(i)
return f
def integer(n):
ch = [] #存储表达式
number = random.randint(1, 2) #随机产生表达式的数量
for i in range(number):
rand = random.randint(0, 1) #随机产生0和1 判断是否使用括号
a = func_integer(number) #调用表达式产生函数，产生表达式
if rand == 0:
op = operation[random.randint(2,3)] #产生，/来连接有括号的表达式，避免产生+，—
rand = random.randint(0, 1) #随机产生0和1 判断是否使用内嵌括号或外嵌括号
if i != number - 1: #避免开始和结尾用无意义的括号
if rand == 0:
ch.append('(')
ch.append(a)
ch.append(op)
ch.append(random.randint(1,10))
ch.append(')')
ch.append(operation[random.randint(0, 3)])
else:
ch.append(a)
ch.append(operation[random.randint(0, 3)])
else:
ch.append(a)
ch.append(operation[random.randint(0, 3)])
else:
ch.append(a)
ch.append(operation[random.randint(0, 3)])
f = ''
for k,i in enumerate(ch): #把列表中的所有值用f一个个连起来
if k != len(ch)-1:
f += str(i)
result_integer(f, n) #调用输出函数
if name == 'main':
print('输入你想做几道题目')
n = int(input())
for i in range(n):
integer(n)
print('题目：')
for k, i in enumerate(question):
print(k + 1,':',i,'=')
print('请输入你的答案：')
for i in range(n):
print('第{}题：'.format(i + 1))
x = Fraction('{}'.format(eval(input()))).limit_denominator()
if x == result[i]:
print('{}:√'.format(i + 1))
else:
print('{}:×'.format(i + 1))
print('正确的答案为：',result[i])
