View Compilation Error

0_0_13893640_16934\Main.java:4: 错误: 需要class, interface或enum
public static void main(String[] args) 
              ^
0_0_13893640_16934\Main.java:7: 错误: 需要class, interface或enum
	     while(sc.hasNextInt())
	     ^
0_0_13893640_16934\Main.java:10: 错误: 需要class, interface或enum
	      int b=sc.nextInt();
	      ^
0_0_13893640_16934\Main.java:11: 错误: 需要class, interface或enum
	      System.out.println(a+b);
	      ^
0_0_13893640_16934\Main.java:12: 错误: 需要class, interface或enum
	     }
	     ^
5 个错误