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| from decimal import Decimal
import random, re
rd = re.compile(r'^-?\d*(?:\.\d*)?\d$')
Norm = Decimal('0.01')
def randint(a=0, b=10):
return str(random.randint(a,b))
def _add():
a, b = randint(), randint()
return f'{a} + {b} =', Decimal(a) + Decimal(b)
def _sub():
a, b = randint(), randint()
return f'{a} - {b} =', Decimal(a) - Decimal(b)
def _mul():
a, b = randint(), randint()
return f'{a} * {b} =', Decimal(a) * Decimal(b)
def _dev():
a, b = randint(), randint(1)
return f'{a} / {b} =', (Decimal(a) / Decimal(b)).quantize(Norm, rounding = 'ROUND_HALF_UP')
opset = (_add, _sub, _mul, _dev)
def _op():
return random.choice(opset)()
total = correct = 0
al = []
ct = ''
while True:
if ct != 'y':
expression, answer = _op()
else:
ct = ''
ua = input(f'第{total+1}题: {expression} ').replace(' ','')
if rd.match(ua):
total += 1
if Decimal(ua).quantize(Norm, rounding = 'ROUND_HALF_UP') == answer:
correct += 1
al.append(f'第{total}题: {expression} {ua} 正确！')
else:
al.append(f'第{total}题: {expression} {ua} 错误！标准答案是 {answer}')
else:
while True:
ct = input('输入错误，是否继续(y/n)').strip().lower()
if ct in 'yn':
break
if ct == 'n':
break
|