View Compilation Error

0_0_32288125_2664\Main.java:2: 错误: 需要class, interface或enum
public calss Main{
       ^
0_0_32288125_2664\Main.java:4: 错误: 需要class, interface或enum
    public static void main(String[] args) {
                  ^
0_0_32288125_2664\Main.java:7: 错误: 需要class, interface或enum
		while (s.hasNext()) {
		^
0_0_32288125_2664\Main.java:9: 错误: 需要class, interface或enum
			int b = 0;
			^
0_0_32288125_2664\Main.java:10: 错误: 需要class, interface或enum
			if (a==0) {
			^
0_0_32288125_2664\Main.java:12: 错误: 需要class, interface或enum
			}
			^
0_0_32288125_2664\Main.java:14: 错误: 需要class, interface或enum
		}
		^
0_0_32288125_2664\Main.java:19: 错误: 需要class, interface或enum
		}
		^
0_0_32288125_2664\Main.java:21: 错误: 需要class, interface或enum
		return root(t);
		^
0_0_32288125_2664\Main.java:22: 错误: 需要class, interface或enum
	}
	^
10 个错误