View Compilation Error

0_0_35547059_19744\Main.java:1: 错误: 非法字符: '#'
#include<stdio.h>
^
0_0_35547059_19744\Main.java:1: 错误: 需要class, interface或enum
#include<stdio.h>
        ^
0_0_35547059_19744\Main.java:2: 错误: 非法字符: '#'
#include<math.h>
^
0_0_35547059_19744\Main.java:6: 错误: 需要class, interface或enum
	while(scanf("%lf",&R)==1&&R)
	^
0_0_35547059_19744\Main.java:9: 错误: 需要class, interface或enum
		r1=R*sqrt(1.0/3);
		^
0_0_35547059_19744\Main.java:10: 错误: 需要class, interface或enum
		printf("%.3lf %.3lf\n",r1,r2);
		^
0_0_35547059_19744\Main.java:11: 错误: 需要class, interface或enum
	}
	^
0_0_35547059_19744\Main.java:13: 错误: 需要class, interface或enum
}
^
8 个错误