【例40.1】字符类型判断

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	songchengxiao	14ms	768 KiB	C++11(O2)	331 Bytes	2025-1-4 17:39:59
AC	zhaorong	14ms	764 KiB	C++11(O2)	419 Bytes	2025-1-12 18:46:52
AC	wangzeshu	14ms	536 KiB	C++11(O2)	302 Bytes	2024-12-25 22:50:36
AC	caoyuanxi	15ms	536 KiB	C++11(O2)	419 Bytes	2025-1-12 19:00:38
AC	gushuwei	15ms	768 KiB	C++11(O2)	360 Bytes	2024-12-21 12:36:04
AC	heqianrui123	15ms	764 KiB	C++11(O2)	255 Bytes	2024-12-30 13:01:21
AC	wangqiguang	15ms	552 KiB	C++11(O2)	271 Bytes	2025-1-3 21:12:55
AC	chengzijun	15ms	556 KiB	C++11(O2)	323 Bytes	2025-1-16 13:10:49
AC	tongyangdi	15ms	764 KiB	C++11(O2)	342 Bytes	2025-1-8 21:10:06