View Compilation Error

0_0_39063454_6232\Main.java:1: 错误: 非法字符: '#'
#include <stdio.h>
^
0_0_39063454_6232\Main.java:1: 错误: 需要class, interface或enum
#include <stdio.h>
         ^
0_0_39063454_6232\Main.java:2: 错误: 非法字符: '#'
#include <math.h>
^
0_0_39063454_6232\Main.java:4: 错误: 需要class, interface或enum
double sum;
^
0_0_39063454_6232\Main.java:5: 错误: 需要class, interface或enum
void Sum(){
^
0_0_39063454_6232\Main.java:6: 错误: 需要class, interface或enum
	for(int i = 0;i<b-1;i++){
	              ^
0_0_39063454_6232\Main.java:6: 错误: 需要class, interface或enum
	for(int i = 0;i<b-1;i++){
	                    ^
0_0_39063454_6232\Main.java:8: 错误: 需要class, interface或enum
		a = sqrt(a);
		^
0_0_39063454_6232\Main.java:9: 错误: 需要class, interface或enum
	}
	^
0_0_39063454_6232\Main.java:14: 错误: 需要class, interface或enum
    	Sum();
    	^
0_0_39063454_6232\Main.java:15: 错误: 需要class, interface或enum
    	printf("%.2lf\n",sum);
    	^
0_0_39063454_6232\Main.java:16: 错误: 需要class, interface或enum
    }
    ^
12 个错误