用for语句打印80行星号（每行20个）

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	肖君陶	3ms	532 KiB	C++98	206 Bytes	2024-12-16 19:56:55
AC	杨毅帆	3ms	324 KiB	C++98	3 KiB	2024-12-2 22:58:38
AC	Chaser Of Light	4ms	1.8 MiB	C++98	3.4 KiB	2024-5-12 9:28:09
AC	牛奶	4ms	284 KiB	C++98	152 Bytes	2024-5-30 21:29:52
AC	丁郑涵	5ms	1.6 MiB	C++17	136 Bytes	2024-7-9 20:09:06
AC	徐严羿泽	27ms	3.9 MiB	Python 3	39 Bytes	2025-1-20 19:10:52