View Compilation Error

0_0_15140089_28692\Main.java:1: 错误: 非法字符: '#'
#include<cstdio>
^
0_0_15140089_28692\Main.java:1: 错误: 需要class, interface或enum
#include<cstdio>
        ^
0_0_15140089_28692\Main.java:2: 错误: 非法字符: '#'
#include<cstring>
^
0_0_15140089_28692\Main.java:4: 错误: 需要class, interface或enum
int gcd(int a,int b)
^
0_0_15140089_28692\Main.java:7: 错误: 需要class, interface或enum
    else
    ^
0_0_15140089_28692\Main.java:9: 错误: 需要class, interface或enum
}
^
0_0_15140089_28692\Main.java:13: 错误: 需要class, interface或enum
    while(scanf("%d%d",&x,&y)!=EOF)
    ^
0_0_15140089_28692\Main.java:15: 错误: 需要class, interface或enum
        return 0;
        ^
0_0_15140089_28692\Main.java:16: 错误: 需要class, interface或enum
}
^
9 个错误