lex.h

编译器

 #pragma   once 
#include "Token.h"
class Lex
{
	char* sql;
    Token *token;
	int ptr;
	int end;
	int backp;
public:
	Lex(char *);
	bool hasNext();
	void back();
	Token* getNextToken();
	bool isCompare(char c);
	bool isBracket(char c);
	Token* getToken();
	char getAt(char *p,int i);
 
};