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View Compilation Error

0_0_30566354_24887\Main.java:1: 错误: 需要class, interface或enum
String s=in.nextLine();
^
0_0_30566354_24887\Main.java:2: 错误: 需要class, interface或enum
			StringBuffer sb=new StringBuffer();
			^
0_0_30566354_24887\Main.java:3: 错误: 需要class, interface或enum
			TreeSet<String> a = new TreeSet<String>();
			^
0_0_30566354_24887\Main.java:4: 错误: 需要class, interface或enum
			if(s.charAt(0)!='#') {
			^
0_0_30566354_24887\Main.java:5: 错误: 需要class, interface或enum
				for(int i=0;i<s.length();i++) {
				            ^
0_0_30566354_24887\Main.java:5: 错误: 需要class, interface或enum
				for(int i=0;i<s.length();i++) {
				                         ^
0_0_30566354_24887\Main.java:7: 错误: 需要class, interface或enum
					if(ch!=' '&&i!=s.length()-1) {
					^
7 个错误


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