用for语句打印二行星号（每行20个）

状态	递交者	时间	内存	语言	代码	递交时间
AC	chenyutong	2ms	13.1 MiB	C++17	144 Bytes	2023-7-20 8:38:47
AC	wangziqian	2ms	13.1 MiB	C++17	221 Bytes	2023-7-2 15:33:29
AC	lishengcheng	2ms	11.8 MiB	C++17	190 Bytes	2023-7-21 9:32:34
AC	chenyutong	2ms	13.1 MiB	C++17	144 Bytes	2023-7-20 8:38:09
AC	zhangjiayi	4ms	12.2 MiB	C++11(O2)	201 Bytes	2024-2-5 13:33:08
AC	sunyian	4ms	12.6 MiB	C++11(O2)	153 Bytes	2024-8-15 15:42:44
AC	liuyukai	4ms	12.6 MiB	C++11(O2)	169 Bytes	2024-8-15 15:41:19
AC	lisibo	5ms	12.9 MiB	C++17	221 Bytes	2024-3-17 12:41:29
AC	dongyantao	8ms	12.6 MiB	C++11(O2)	185 Bytes	2024-8-15 15:43:56