【例23.3】简单计算器

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	庞少卿	12ms	504 KiB	C++98	447 Bytes	2025-10-21 17:14:20
AC	劳钰峰	13ms	504 KiB	C++98	346 Bytes	2025-10-22 21:38:59
AC	朱梓霖	14ms	508 KiB	C++98	358 Bytes	2025-10-9 16:48:56
AC	张若煊	14ms	760 KiB	C++98	416 Bytes	2025-9-27 20:59:43
AC	朱子轩	14ms	536 KiB	C++98	351 Bytes	2025-9-16 20:19:02
AC	陈沛宜	14ms	504 KiB	C++98	371 Bytes	2025-12-11 13:10:31
AC	李文茵	15ms	504 KiB	C++98	354 Bytes	2025-10-30 21:50:00
AC	谢钰莹	15ms	508 KiB	C++98	357 Bytes	2025-12-25 14:28:17