global.h

一个简单的词法分析器

#ifndef _GLOBAL_H
#define _GLOBAL_H
#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
#define BSIZE 128
#define NONE  -1
#define EOS   '\0'
#define NUM   256
#define DIV   257
#define MOD   258
#define ID    259
#define DONE  260
#define SIN   261

struct entry {
	char * lexptr;
	float token;
};

extern char lexemes[];
extern int lastchar;
extern struct entry symtable[];
extern int lastentry;

extern lineno;
extern char lexbuf[BSIZE];
extern float tokenval;

extern lookahead;


#endif