交换 a 和 b 的值

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	tianyuyang23010	13ms	7.1 MiB	C++98	134 Bytes	2024-4-19 19:14:06
AC	凌胥桐1	62ms	532 KiB		204 Bytes	2024-3-23 9:54:15
AC	陈信羽	65ms	532 KiB		117 Bytes	2024-3-23 9:14:11
AC	余秋仪	65ms	764 KiB		140 Bytes	2024-3-23 9:12:40
AC	段昱同	66ms	764 KiB		219 Bytes	2024-3-23 9:13:37
AC	余秋仪	67ms	764 KiB		206 Bytes	2024-3-23 9:53:28
AC	陈信羽	67ms	536 KiB		224 Bytes	2024-3-23 9:56:28
AC	周芷乐	69ms	788 KiB		123 Bytes	2024-3-15 18:08:59
AC	代一升	69ms	764 KiB		214 Bytes	2024-3-23 9:50:42
AC	zhangluyang	69ms	764 KiB		210 Bytes	2024-3-23 10:01:42
AC	邱越1	71ms	532 KiB		213 Bytes	2024-3-28 19:13:28
AC	周芷乐	71ms	536 KiB		228 Bytes	2024-3-23 9:51:56