View Compilation Error

0_0_39033032_32272\Main.java:1: 错误: 需要class, interface或enum
    public static void main(String[] args) {
                  ^
0_0_39033032_32272\Main.java:3: 错误: 需要class, interface或enum
        int num = sc.nextInt();
        ^
0_0_39033032_32272\Main.java:4: 错误: 需要class, interface或enum
        for (int i = 0; i < num; i++) {
        ^
0_0_39033032_32272\Main.java:4: 错误: 需要class, interface或enum
        for (int i = 0; i < num; i++) {
                        ^
0_0_39033032_32272\Main.java:4: 错误: 需要class, interface或enum
        for (int i = 0; i < num; i++) {
                                 ^
0_0_39033032_32272\Main.java:6: 错误: 需要class, interface或enum
            int b=sc.nextInt();
            ^
0_0_39033032_32272\Main.java:7: 错误: 需要class, interface或enum
            System.out.println(a+b);
            ^
0_0_39033032_32272\Main.java:8: 错误: 需要class, interface或enum
        }
        ^
8 个错误