View Compilation Error

0_0_24303145_12703\Main.java:1: 错误: 需要class, interface或enum
Scanner sc = new Scanner(System.in);  
^
0_0_24303145_12703\Main.java:2: 错误: 需要class, interface或enum
        while(sc.hasNext()){  
        ^
0_0_24303145_12703\Main.java:4: 错误: 需要class, interface或enum
            int sum = 0;  
            ^
0_0_24303145_12703\Main.java:5: 错误: 需要class, interface或enum
            for(int i = 1; i<=n;i++){  
            ^
0_0_24303145_12703\Main.java:5: 错误: 需要class, interface或enum
            for(int i = 1; i<=n;i++){  
                           ^
0_0_24303145_12703\Main.java:5: 错误: 需要class, interface或enum
            for(int i = 1; i<=n;i++){  
                                ^
0_0_24303145_12703\Main.java:7: 错误: 需要class, interface或enum
            }  
            ^
0_0_24303145_12703\Main.java:9: 错误: 需要class, interface或enum
            System.out.println();  
            ^
0_0_24303145_12703\Main.java:10: 错误: 需要class, interface或enum
        }  
        ^
9 个错误