try:
a = int(input('请输入被除数'))
b = int(input('请输入除数'))
print(a / b)
except ValueError:
print('请输入数字')
except ZeroDivisionError as e:
b = int(input('除数不能为零,请重新输入除数'))
print(a / b)
except Exception as ex:
print(ex)
else:
print('以上程序没有出现错误')
finally:
print('异常处理完毕')