/*?編譯原理上機實驗?實驗一?詞法分析程序

?*?姓名：_王華慈___

?*?學號：_09070626_

?*?班級：__090706__

?*?2012年_5_月_31_日

?*/
import?java.io.File;
import?java.io.FileInputStream;
import?java.io.IOException;
import?java.io.InputStream;
import?java.io.PushbackInputStream;

public?class?gemmar?{

	/**
	?*?@param?args
	?*/
	final?static?int?IDN?=?1;
	final?static?int?INT10?=?2;
	final?static?int?INT8?=?3;
	final?static?int?INT16?=?4;
	final?static?int?ADD?=?5;
	final?static?int?SUB?=?6;
	final?static?int?MUL?=?7;
	final?static?int?DIV?=?8;
	final?static?int?GT?=?9;
	final?static?int?LT?=?10;
	final?static?int?EQ?=?11;
	final?static?int?LP?=?12;
	final?static?int?RP?=?13;
	final?static?int?SEMI?=?14;
	final?static?int?DO?=?100;
	final?static?int?ELSE?=?101;
	final?static?int?IF?=?102;
	final?static?int?THEN?=?103;
	final?static?int?WHILE?=?104;
	//?常量聲明
	private?static?gemmar?g?=?null;
	private?static?PushbackInputStream?f?=?null;
	static?int?lookhead;
	static?String[]?keyword?=?{?“do“?“else“?“if“?“then“?“while“?};
	int?i?=?0;
	StringBuffer?str?=?new?StringBuffer（）;
	StringBuffer?stre?=?new?StringBuffer（）;

	public?static?void?main（String[]?args）?throws?IOException?{
		//?TODO?Auto-generated?method?stub
		String[]?filea?=?args;
		File?file?=?new?File（filea[0]）;
		InputStream?in?=?new?FileInputStream（file）;
		f?=?new?PushbackInputStream（in）;
		g?=?new?gemmar（）;
		lookhead?=?g.scan（f）;
		System.out.println（“S“）;
		g.statement（）;
	}

	public?void?statement（）?{
		g.stre.append（“???“）;
		if?（lookhead?==?IDN）?{
			System.out.print（g.stre.toString（）?+?“id:“）;
			match（IDN）;
			System.out.print（g.stre.toString（）?+?“=“）;
			match（EQ）;
			System.out.println（g.stre.toString（）?+?“E“）;
			exp（）;
		}?else?if?（keyword[lookhead?-?100].equals（“if“））?{
			System.out.print（g.stre.toString（））;
			match（IF）;
			System.out.println（g.stre.toString（）?+?“C“）;
			g.stre.append（“???“）;
			System.out.println（g.stre.toString（）?+?“E“）;
			exp（）;
			g.stre.delete（0?3）;
			if?（lookhead?==?LT）?{
				System.out.print（g.stre.toString（）?+?“<“）;
				match（LT）;
			}?else?if?（lookhead?==?GT）?{
				System.out.print（g.stre.toString（）?+?“>“）;
				match（GT）;
			}?else?if?（lookhead?==?EQ）?{
				System.out.print（g.stre.toString（）?+?“=“）;
				match（EQ）;
			}?else
				error（）;
			System.out.println（g.stre.toString（）?+?“E“）;
			exp（）;
			g.stre.delete（0?3）;
			g.stre.delete（0?3）;
			System.out.print（g.stre.toString（））;
			match（THEN）;
			System.out.println（g.stre.toString（）?+?“S“）;
			statement（）;
			g.stre.delete（0?3）;
		}?else?if?（keyword[lookhead?-?100].equals（“while“））?{
			System.out.print（g.stre.toString（）?+?“while“）;
			match（WHILE）;
			System.out.println（g.stre.toString（）?+?“C“）;
			g.stre.append（“???“）;
			System.out.println（g.stre.toString（）?+?“E“）;
			exp（）;
			g.stre.delete（0?3）;
			if?（lookhead?==?LT）?{
				System.out.print（g.stre.toString（）?+?“<“）;
				match（LT）;
			}?else?if?（lookhead?==?GT）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????301??2012-05-14?13:45??translation\.classpath

?????文件????????387??2012-05-14?13:45??translation\.project

?????文件????????598??2012-05-14?13:45??translation\.settings\org.eclipse.jdt.core.prefs

?????文件????????385??2012-05-15?14:24??translation\bin\C_Attr.class

?????文件????????349??2012-05-15?14:24??translation\bin\E_Attr.class

?????文件????????349??2012-05-15?14:24??translation\bin\F_Attr.class

?????文件????????385??2012-05-15?14:24??translation\bin\S_Attr.class

?????文件???????9521??2012-05-15?14:24??translation\bin\translate.class

?????文件????????349??2012-05-15?14:24??translation\bin\T_Attr.class

?????文件??????10794??2012-05-31?15:30??translation\src\translate.java

?????文件????????301??2012-03-18?20:37??lexical\.classpath

?????文件????????383??2012-03-18?20:37??lexical\.project

?????文件????????598??2012-03-18?20:37??lexical\.settings\org.eclipse.jdt.core.prefs

?????文件???????5636??2012-05-15?15:41??lexical\bin\lexical.class

?????文件???????6507??2012-05-31?15:29??lexical\src\lexical.java

?????文件????????301??2012-03-29?15:24??gammar\.classpath

?????文件????????382??2012-03-29?15:24??gammar\.project

?????文件????????598??2012-03-29?15:24??gammar\.settings\org.eclipse.jdt.core.prefs

?????文件???????8127??2012-05-15?14:35??gammar\bin\gemmar.class

?????文件???????9175??2012-05-31?15:28??gammar\src\gemmar.java

?????目錄??????????0??2012-05-15?15:41??translation\.settings

?????目錄??????????0??2012-05-15?15:41??translation\bin

?????目錄??????????0??2012-05-15?15:41??translation\src

?????目錄??????????0??2012-05-15?15:41??lexical\.settings

?????目錄??????????0??2012-05-15?15:41??lexical\bin

?????目錄??????????0??2012-05-15?15:41??lexical\src

?????目錄??????????0??2012-05-15?15:42??gammar\.settings

?????目錄??????????0??2012-05-15?15:42??gammar\bin

?????目錄??????????0??2012-05-15?15:42??gammar\src

?????目錄??????????0??2012-05-15?15:41??translation

............此處省略5個文件信息