View Compilation Error

0_0_36897917_32391\Main.java:2: 错误: 需要class, interface或enum
public classMain
       ^
0_0_36897917_32391\Main.java:4: 错误: 需要class, interface或enum
{public static void main(String[] args)
               ^
0_0_36897917_32391\Main.java:7: 错误: 需要class, interface或enum
Scanner scan= new Scanner (System.in);int a, b;while(scan.hasNextInt())
                                      ^
0_0_36897917_32391\Main.java:7: 错误: 需要class, interface或enum
Scanner scan= new Scanner (System.in);int a, b;while(scan.hasNextInt())
                                               ^
0_0_36897917_32391\Main.java:12: 错误: 需要class, interface或enum
b=scan.nextInt();if (a == 0 && b == 0)
^
0_0_36897917_32391\Main.java:12: 错误: 需要class, interface或enum
b=scan.nextInt();if (a == 0 && b == 0)
                 ^
0_0_36897917_32391\Main.java:16: 错误: 需要class, interface或enum
}
^
0_0_36897917_32391\Main.java:20: 错误: 需要class, interface或enum
}
^
8 个错误