global.h

一个简单的识别运算的编译器程序

#include<stdio.h>
#include<ctype.h>
#include<stdlib.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

int tokenval;
int lineno;

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

struct entry symtable[];