View Compilation Error

0_0_18234793_19473\Main.java:3: 错误: 需要class, interface或enum
public classMain {
       ^
0_0_18234793_19473\Main.java:5: 错误: 需要class, interface或enum
	public static void main(String[] args){
	              ^
0_0_18234793_19473\Main.java:7: 错误: 需要class, interface或enum
		int a,b;
		^
0_0_18234793_19473\Main.java:8: 错误: 需要class, interface或enum
		while(sc.hasNextInt()){
		^
0_0_18234793_19473\Main.java:10: 错误: 需要class, interface或enum
			b=sc.nextInt();
			^
0_0_18234793_19473\Main.java:11: 错误: 需要class, interface或enum
			System.out.println(a+b);
			^
0_0_18234793_19473\Main.java:12: 错误: 需要class, interface或enum
		}
		^
7 个错误