View Compilation Error

0_0_21989634_24013\Main.java:2: 错误: 需要class, interface或enum
    public static void main(String[] args)
                  ^
0_0_21989634_24013\Main.java:5: 错误: 需要class, interface或enum
                {
                ^
0_0_21989634_24013\Main.java:9: 错误: 需要class, interface或enum
                        int b = cin.nextInt();
                        ^
0_0_21989634_24013\Main.java:10: 错误: 需要class, interface或enum
                        System.out.println(a+b);
                        ^
0_0_21989634_24013\Main.java:11: 错误: 需要class, interface或enum
                    }
                    ^
5 个错误