View Compilation Error

0_0_38860329_9411\Main.java:1: 错误: 非法字符: '#'
#include <stdio.h>
^
0_0_38860329_9411\Main.java:1: 错误: 需要class, interface或enum
#include <stdio.h>
         ^
0_0_38860329_9411\Main.java:4: 错误: 需要class, interface或enum
    while(scanf("%d",&n)!=EOF){
    ^
0_0_38860329_9411\Main.java:6: 错误: 需要class, interface或enum
       	while(1){
       	^
0_0_38860329_9411\Main.java:8: 错误: 需要class, interface或enum
        	n=n/2;         //被除数除以2 
        	^
0_0_38860329_9411\Main.java:9: 错误: 需要class, interface或enum
        	y+=yu*i;       //i初始为1 
        	^
0_0_38860329_9411\Main.java:10: 错误: 需要class, interface或enum
        	i*=10;         //i乘以10 
        	^
0_0_38860329_9411\Main.java:11: 错误: 需要class, interface或enum
        	if(n<2){
        	^
0_0_38860329_9411\Main.java:13: 错误: 需要class, interface或enum
        		break;
        		^
0_0_38860329_9411\Main.java:14: 错误: 需要class, interface或enum
			}
			^
0_0_38860329_9411\Main.java:17: 错误: 需要class, interface或enum
    }
    ^
0_0_38860329_9411\Main.java:19: 错误: 需要class, interface或enum
}
^
12 个错误