【例3.1】输出表达式的值

Status	Submit By	Time	Memory	Language	Code	Submit At
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