value = input('请输入一个整数')
b_except = True
try:
    value = int(value)
except:
    value = 0
else:
    b_except = False
    print('没有发生异常')
if value == 0:
    if not b_except:
        print(0)
    else:
        print('输入有异常')
else:
    print(value)