View Compilation Error

0_0_38486216_23368\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_38486216_23368\Main.java:3: 错误: 需要class, interface或enum
        int n=sc.nextInt();
        ^
0_0_38486216_23368\Main.java:4: 错误: 需要class, interface或enum
        int sum=0;
        ^
0_0_38486216_23368\Main.java:5: 错误: 需要class, interface或enum
        while(n!=0)
        ^
0_0_38486216_23368\Main.java:8: 错误: 需要class, interface或enum
          int a=sc.nextInt();
          ^
0_0_38486216_23368\Main.java:9: 错误: 需要class, interface或enum
        while(a!=0)
        ^
0_0_38486216_23368\Main.java:12: 错误: 需要class, interface或enum
            a>>=8;
            ^
0_0_38486216_23368\Main.java:13: 错误: 需要class, interface或enum
        }
        ^
0_0_38486216_23368\Main.java:16: 错误: 需要class, interface或enum
        System.out.println(sum);
        ^
0_0_38486216_23368\Main.java:17: 错误: 需要class, interface或enum
    }
    ^
10 个错误