【例21.3】字符类型判断

状态	递交者	时间	内存	语言	代码	递交时间
AC	032660104王志禹	6ms	256 KiB	C	289 Bytes	2026-9-18 17:41:25
AC	汪奥焱152630426	6ms	256 KiB	C	235 Bytes	2026-9-18 11:33:49
AC	052650322董亿达	6ms	256 KiB	C	208 Bytes	2026-10-2 16:54:05
AC	周静仪	6ms	256 KiB	C	289 Bytes	2026-9-10 21:48:05
AC	042600602	6ms	512 KiB	C	278 Bytes	2026-9-19 15:53:27
AC	042600830林贤宸	6ms	288 KiB	C	340 Bytes	2026-9-28 17:40:55
AC	荔枝lz	6ms	256 KiB	C	251 Bytes	2026-9-19 20:57:42
AC	wallin	6ms	256 KiB	C	268 Bytes	2026-9-19 20:37:46
AC	052620114罗子昕	7ms	512 KiB	C	250 Bytes	2026-9-26 21:47:08
AC	TrailBlaze	7ms	256 KiB	C	242 Bytes	2026-10-5 15:50:23
AC	+++	7ms	512 KiB	C	355 Bytes	2026-9-21 16:43:24
AC	052650125	7ms	512 KiB	C	284 Bytes	2026-10-8 17:37:46
AC	Exeyes_BCNR	7ms	256 KiB	C	320 Bytes	2026-9-28 10:59:10