获取4位整数的倒数第二个值

def get_second_last_digit(num):
    num_str = str(num)
    if len(num_str) != 4:
        return "输入的数字不是4位整数"
    second_last_digit = int(num_str[-2])
    return second_last_digit

# 测试示例
num = 1234
result = get_second_last_digit(num)
print(result)  # 输出：3