【入门】已知一个圆的半径，求解该圆的面积和周长

状态	递交者	时间	内存	语言	代码	递交时间
AC	lijianan	1ms	516 KiB	C++98	167 Bytes	2026-4-21 13:55:03
AC	tuleiyang	1ms	444 KiB	C++17(O2)	170 Bytes	2026-4-25 14:14:56
AC	lukuan	1ms	440 KiB	C++17(O2)	145 Bytes	2026-4-24 21:45:37
AC	dengzhiwei	1ms	408 KiB	C++17(O2)	197 Bytes	2026-4-22 12:29:15
AC	zhou37	1ms	532 KiB	C++17(O2)	153 Bytes	2026-5-29 13:58:04
AC	MYM	1ms	504 KiB	C++17(O2)	203 Bytes	2026-5-9 19:24:03
AC	liuhangrui	1ms	556 KiB	C++17(O2)	256 Bytes	2026-5-12 21:45:58
AC	zhangjunyu	1ms	508 KiB	C++17(O2)	144 Bytes	2026-4-21 13:31:09
AC	xiaominghao	2ms	504 KiB	C++17(O2)	128 Bytes	2026-6-6 14:44:13
AC	xuruicheng	2ms	504 KiB	C++17(O2)	192 Bytes	2026-6-9 9:11:38
AC	liangshengrui	2ms	388 KiB	C++17(O2)	170 Bytes	2026-6-9 11:32:09