/**************************************************************************
*作????者：王林
*創建時間：2007-12-16
*描????述：完成
*注意事項：無
*遺?留BUG：無
*修改時間：2007-12-16到2007-12-30
**************************************************************************/

#include?“LexicalAnalyzer.h“;

///

///LexicalAnalyzer的構造函數
///

LexicalAnalyzer::LexicalAnalyzer（）{
	row=0;
	lex_beginning=0;
	forward=0;
	state=0;
	start=0;
	linenumber=0;
	lineposition=0;
}
///

///初始化變量
///

///
void?LexicalAnalyzer::InitPara（）{
	lex_beginning=0;
	forward=0;
	state=0;
	start=0;
	buffer.clear（）;
}
///

///Check?Delimiters
///

///如果是Delimiter，返回true，否則返回false
bool?LexicalAnalyzer::checkDelimiters（）{
	if（buffer[forward]==‘{‘||buffer[forward]==‘}‘||buffer[forward]==‘（‘||buffer[forward]==‘）‘||buffer[forward]==‘;‘）?return?true;
	else?return?false;
}
///

///Check?Compare?Operator
///

///如果是Compare?Operator，返回true，否則返回false
bool?LexicalAnalyzer::check（）{
	if（?buffer[forward]==‘=‘||buffer[forward]==‘>‘||buffer[forward]==‘<‘||buffer[forward]==‘!‘）?return?true;
	else?return?false;
}
///

///Check?Operator
///

///如果是Operator，返回true，否則返回false
bool?LexicalAnalyzer::checkOperators（）{
	if（buffer[forward]==‘+‘||buffer[forward]==‘-‘||buffer[forward]==‘*‘||buffer[forward]==‘/‘）?return?true;
	else?return?false;
}
///

///打開輸入輸出文件
///

///輸入文件的路徑和文件名
///輸出文件的路徑和文件名
///如果是C打開成功，返回true，否則返回false
bool?LexicalAnalyzer::OpenFile（string?infilePathstring?outfilePath）{
	input.open（infilePath.c_str（））;
	output.open（outfilePath.c_str（））;
	if?（input&&output）?return?true;
	else?return?false;
}
///

///關閉輸入輸出文件
///

///
void?LexicalAnalyzer::CloseFile（）{
	input.close（）;
	output.close（）;
}
///

///類型匹配，獲得下一個token
///

///返回匹配成功的token，或是錯誤標識
string?LexicalAnalyzer::nexttoken（）{
	while（true）{
		switch（state）{
			case?0:??????????????????????????????????????????//匹配?“//“
				c=buffer[forward];
				forward++;
				if（isspace（c））{
				????state=0;
				????lex_beginning++;
				}
				else?if（c==0）{forward--;?return?“\n“;}
				else?if（c==‘/‘）?state=1;
				else?state=fail（）;
			????break;
			case?1:
				c=buffer[forward];
				forward++;
				if（c==‘/‘）return?“//“;
				else?state=fail（）;
				break;?????????
			case?2:???????????????????????????????????????//匹配if，int
				c=buffer[forward];
				if（c==‘i‘）state=3;
				else?state=fail（）;
				break;
			case?3:
				forward++;
				c=buffer[forward];
				if（c==‘f‘）{
					forward++;
					if（isspace（buffer[forward]）||buffer[forward]==0||checkDelimiters（））?return?“if“;
					if（check（）||checkOperators（））?state=37;????????????????????????//error:+-*/<>=!?f

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

?????文件??????98816??2007-12-26?16:00??上機實踐報告_詞法分析器.doc

?????文件?????152576??2007-12-26?21:15??上機實踐報告_語法分析器.doc

?????文件?????????23??2008-01-03?20:54??email.txt

?????文件??????77824??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\debug\LexicalAnalyzer.exe

?????文件?????474088??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\debug\LexicalAnalyzer.ilk

?????文件?????560128??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\debug\LexicalAnalyzer.pdb

?????文件??????10294??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\BuildLog.htm

?????文件????????405??2007-12-26?20:03??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\LexicalAnalyzer.exe.embed.manifest

?????文件????????472??2007-12-26?20:03??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\LexicalAnalyzer.exe.embed.manifest.res

?????文件????????387??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\LexicalAnalyzer.exe.intermediate.manifest

?????文件?????100995??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\LexicalAnalyzer.obj

?????文件??????46419??2007-12-26?20:03??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\main.obj

?????文件?????????69??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\mt.dep

?????文件?????248832??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\vc80.idb

?????文件?????208896??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\Debug\vc80.pdb

?????文件?????????82??2007-12-20?10:31??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\ffbbx

?????文件????????397??2007-12-20?00:01??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\include.h

?????文件??????13737??2007-12-26?22:06??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\LexicalAnalyzer.cpp

?????文件????????817??2007-12-20?00:00??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\LexicalAnalyzer.h

?????文件???????4419??2007-12-26?20:08??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\LexicalAnalyzer.vcproj

?????文件???????1411??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\LexicalAnalyzer.vcproj.ECNU-WL.dream.user

?????文件????????600??2007-12-20?00:01??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\main.cpp

?????文件??????32768??2007-11-27?15:49??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\programming_assignment01－lexical?analyzer.doc

?????文件????????158??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\tok.txt

?????文件??????????6??2007-12-26?21:59??詞法分析器\LexicalAnalyzer\LexicalAnalyzer\toy.txt

?????文件????1444864??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer.ncb

?????文件????????910??2007-12-11?09:44??詞法分析器\LexicalAnalyzer\LexicalAnalyzer.sln

????..A..H.?????36864??2007-12-26?22:07??詞法分析器\LexicalAnalyzer\LexicalAnalyzer.suo

?????文件?????286750??2007-12-26?20:02??詞法分析器\LexicalAnalyzer.rar

?????文件?????135168??2007-12-26?21:20??語法分析器\SyntaxAnalyzer\debug\SyntaxAnalyzer.exe

............此處省略76個文件信息