【例3.1】输出表达式的值

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	赵梓澈	2ms	512 KiB	C++14	107 Bytes	2026-3-28 19:41:33
AC	金士涵	2ms	512 KiB	C++14	99 Bytes	2026-3-19 22:08:47
AC	雅鑫	3ms	512 KiB	C++14	105 Bytes	2026-3-14 16:58:57
AC	董宇博	3ms	512 KiB	C++14	111 Bytes	2026-3-21 20:58:09
AC	刘泰然	3ms	512 KiB	C++14	180 Bytes	2026-3-20 21:34:09
AC	桑语禅	3ms	492 KiB	C++14	102 Bytes	2025-6-29 9:50:58
AC	王宇泽	3ms	536 KiB	C++14	100 Bytes	2025-9-7 11:48:06
AC	马梓睿	3ms	768 KiB	C++14	98 Bytes	2025-9-7 11:53:25
AC	厉梦澜	3ms	512 KiB	C++14	97 Bytes	2026-3-14 11:04:31
AC	小赵老师	3ms	504 KiB	C++14	113 Bytes	2025-5-24 14:28:54
AC	杨辰睿	3ms	504 KiB	C++14	179 Bytes	2025-6-8 15:03:41
AC	杨丛恺	3ms	504 KiB	C++14	123 Bytes	2025-6-4 17:47:41
AC	陈冠伯	3ms	504 KiB	C++14	114 Bytes	2025-5-24 14:31:00
AC	时空小孙	3ms	768 KiB	C++14	150 Bytes	2026-3-14 16:22:02
AC	逍遥	3ms	764 KiB	C++14	100 Bytes	2025-9-7 11:54:12