将字符串中的小写字母转换成大写字母

状态	递交者	时间	内存	语言	代码	递交时间
AC	hank1216	4ms	1 KiB	G++(9.3(with c++17))	224 Bytes	2026-2-1 8:52:56
AC	小可爱1130	4ms	1 KiB	G++(9.3(with c++17))	233 Bytes	2026-2-2 16:20:53
AC	zack321	5ms	1 KiB	G++(9.3(with c++17))	203 Bytes	2026-1-31 20:30:39
AC	zhanghaochen	5ms	1 KiB	G++(9.3(with c++17))	183 Bytes	2026-2-9 14:36:05
AC	沈思成	5ms	1 KiB	G++(9.3(with c++17))	194 Bytes	2026-2-24 18:08:57
AC	guqiuchen	5ms	1 KiB	G++(9.3(with c++17))	277 Bytes	2026-2-22 15:41:32