View Compilation Error

0_0_33252546_27799\Main.java:1: 错误: 非法字符: '#'
#include<stdio.h>
^
0_0_33252546_27799\Main.java:1: 错误: 需要class, interface或enum
#include<stdio.h>
        ^
0_0_33252546_27799\Main.java:2: 错误: 非法字符: '#'
#include<math.h>
^
0_0_33252546_27799\Main.java:6: 错误: 需要class, interface或enum
	while(scanf("%d%d%d%d",&x1,&y1,&x2,&y2)!=EOF){
	^
0_0_33252546_27799\Main.java:8: 错误: 需要class, interface或enum
		num=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
		^
0_0_33252546_27799\Main.java:9: 错误: 需要class, interface或enum
		printf("%.2f\n",num);
		^
0_0_33252546_27799\Main.java:10: 错误: 需要class, interface或enum
	}
	^
0_0_33252546_27799\Main.java:14: 错误: 需要class, interface或enum
}
^
8 个错误