#include?
#include?
#include?
#include?
#include?
using?namespace?std;

//列表?
#define?ID?????????1?????/*?標識符?*/
#define?DIGIT??????2?????/*?整數常量?*/
#define?MAINWORD???3?????/*?保留字?*/

#define?SEMI???????4?????/*?；*/
#define?DOT????????5?????/*?.?*/
#define?COMMA??????6?????/*?，*/
#define?COLON??????7?????/*?:?*/
#define?LP?????????8?????/*?（?*/
#define?RP?????????9?????/*?）?*/

#define?PLUS???????10????/*?+?*/
#define?MINUS??????11????/*?-?*/
#define?MUL????????12????/*?*?*/
#define?DIV????????13????/*?/?*/
#define?EQUAL??????14????/*?=?*/
#define?LESS???????15????/*?#define?GREATER????16????/*?>?*/
#define?YU?????????17????/*?&?*/
#define?HUO????????18????/*?|?*/
#define?FEI????????19????/*?!?*/

#define?LESS_EQ????20????/*?<=?*/
#define?GREATER_EQ?21????/*?>=?*/
#define?NOT_EQ?????22????/*?<>?*/
#define?IDENTI_EQ??23????/*?:=?*/

#define?pNOTE??????24????//?/*?
#define?fNOTE??????25????//?*/
#define?NOTE???????26????//

#define?ERROR??????99????/*?錯誤標志?*/
#define?FEOF???????100???/*?輸入結束標志?*/
#define?NONE???????0?????/*?無效數據類型?*/

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//***********************************************【詞法分析部分】*************************************************
struct?Word?//單詞
{
????char???w[100];
????int????type;//類型
????int????row;?//行
????int????col;?//列
};
FILE?*fp*FP;
int?row=0count1=0count2=0count3=0;
static?char?*keyWords[]={“null““word““digit““mainword““;““.““““:““（““）““+““-“
?????????????????????????“*““/““=““<““>““&““|““!““<=““>=““<>““:=““/*““*/““//“NULL};
static?char?*mainWords[]={“null““program““begin““end““var““integer““real““while““do““if““then““else“NULL};?

int?isOperator_1（char?ch）//可能是單目運算符
{
????return?ch==‘;‘||ch==‘.‘||ch==‘‘||ch==‘（‘||ch==‘）‘||ch==‘+‘||ch==‘-‘||ch==‘=‘||ch==‘&‘||ch==‘|‘||ch==‘!‘||ch==‘*‘;?
}

int?isOperator_2（char?ch）//可能是雙目運算符
{
????return?ch==‘<‘?||?ch==‘>‘?||?ch==‘/‘?||?ch==‘:‘;
}

struct?Word?getWord（）
{
????struct?Word?t;
????char?word[100];
????static?char?arr[100]=“\n“;
????static?char?*p=arr;
????int?i=0;
????if（ferror（fp））???cout<<“feof!“<????while（*p==‘\n‘?||?*p==‘?‘?||?*p==‘\t‘）//忽略空格如果已到行尾，則讀入下一行
	{
		if（*p==‘\n‘）
		{
			fgets（arr100fp）;//從文件中讀取下一行代碼
			if（feof（fp））{
				t.type=FEOF;
				return?t;
			}//文件已結束返回FEOF
			p=arr;
			row++;
			continue;
		}
		p++;
	}
	t.type=ERROR;
	if（isalpha（*p）?||?*p==‘_‘）{//字母開頭或下劃線開頭?
????????while（isalpha（*p）?||?isdigit（*p）?||?*p==‘_‘）?
			word[i++]=*p++;
????????word[i]=‘\0‘;//結束?
		t.row=row;???//記錄行號
		t.col=p-arr;?//記錄列號
????????for（int?j=1;mainWords[j];j++）{??//依次對比關鍵字
????????????if（!strcmp（wordmainWords[j]））{//返回0即找到關鍵字?
????????????????t.type=MAINWORD;
????????????????strcpy（t.wword）;//詞素內容
????????????????count3++;
????????????????break;
????????????}
???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-10-22?23:24??四元式生成\
?????文件????????2143??2015-06-12?18:29??四元式生成\answer3.txt
?????文件?????????520??2015-06-12?18:03??四元式生成\test3.txt
?????文件???????19980??2015-06-12?18:04??四元式生成\四元式.cpp
?????文件?????6670065??2015-06-12?18:21??四元式生成\四元式.exe