for (int i = 0; i < len; i++)
应该是
for (int i = 0; i <= len; i++)
@[WZRYWZWY](/user/704668)
by Glacial_Shine @ 2023-09-25 19:23:41
@[konjac_HZX](/user/363139) 谢谢大佬QAQ
by WZRYWZWY @ 2023-09-25 19:23:49