rich1.0222 wrote222 (npub1hs…cd02h)https://yabu.me/npub1hspdlvgdjf5lnzhk9wdadgss6uh8e9duf2rhqd0fnz6220kc6x6slcd02hnjumphttps://yabu.me #[0] 有一段c++代码 typedef Tokenized<‘.’> MKFString; MKFString key = uuu.iii.hhh; 那么key[0]的值是多少？