老子是北瓜 @ 2022-02-10 20:51:51
l>r 是输出0还是将l和r交换？
by Nopain @ 2022-02-10 20:53:08
swap(l,r)
by 老子是北瓜 @ 2022-02-10 20:55:58
@sunset1028 thx