View Compilation Error

0_0_37934822_18832\Main.java:2: 错误: 需要class, interface或enum
 public static void main(String[] args)
               ^
0_0_37934822_18832\Main.java:5: 错误: 需要class, interface或enum
        int a=0,b=0;
        ^
0_0_37934822_18832\Main.java:6: 错误: 需要class, interface或enum
        if(ac.hasNextInt())
        ^
0_0_37934822_18832\Main.java:9: 错误: 需要class, interface或enum
            b=ac.nextInt();
            ^
0_0_37934822_18832\Main.java:10: 错误: 需要class, interface或enum
        }
        ^
0_0_37934822_18832\Main.java:13: 错误: 需要class, interface或enum
    }
    ^
6 个错误