View Compilation Error

0_0_13614941_6878\Main.java:2: 错误: 需要class, interface或enum
    publicclass P1090{
    ^
0_0_13614941_6878\Main.java:3: 错误: 需要class, interface或enum
     public static void main(String args[]){
                   ^
0_0_13614941_6878\Main.java:5: 错误: 需要class, interface或enum
	    int n=sc.nextInt();
	    ^
0_0_13614941_6878\Main.java:6: 错误: 需要class, interface或enum
		while(n>0){
		^
0_0_13614941_6878\Main.java:8: 错误: 需要class, interface或enum
		  int b=sc.nextInt();
		  ^
0_0_13614941_6878\Main.java:9: 错误: 需要class, interface或enum
		  int sum=a+b;
		  ^
0_0_13614941_6878\Main.java:10: 错误: 需要class, interface或enum
		  System.out.println(a+b);
		  ^
0_0_13614941_6878\Main.java:11: 错误: 需要class, interface或enum
		  n--;
		  ^
0_0_13614941_6878\Main.java:13: 错误: 需要class, interface或enum
		}
		^
9 个错误