View Compilation Error

0_0_39659377_27446\Main.java:1: 错误: 需要class, interface或enum
        Scanner sc = new Scanner(System.in);
        ^
0_0_39659377_27446\Main.java:2: 错误: 需要class, interface或enum
        String input;
        ^
0_0_39659377_27446\Main.java:3: 错误: 需要class, interface或enum
        int sum;
        ^
0_0_39659377_27446\Main.java:4: 错误: 需要class, interface或enum
        while(sc.hasNext()){
        ^
0_0_39659377_27446\Main.java:6: 错误: 需要class, interface或enum
            String[] nums = input.split(" ");
            ^
0_0_39659377_27446\Main.java:7: 错误: 需要class, interface或enum
            sum = 0;
            ^
0_0_39659377_27446\Main.java:8: 错误: 需要class, interface或enum
            if(nums.length > 1){
            ^
0_0_39659377_27446\Main.java:11: 错误: 需要class, interface或enum
                }
                ^
0_0_39659377_27446\Main.java:13: 错误: 需要class, interface或enum
            }
            ^
9 个错误