prog6b.l

%{
#include<stdio.h>
#include "y.tab.h"
extern int yylval;
%}
%%
[\t];
[+|-|*|/|=|<|>] {printf("Operator is %s \n",yytext); return OP;}
[0-9]+ {yylval=atoi(yytext); printf("Numbers is %d \n",yylval); return DIGIT;}
int|char|bool|float|void|for|do|while|if|else|return|void {printf("Keyword is %s \n", yytext); return KEY;}
[a-z A-Z 0-9]+ {printf("Identifier is %s \n", yytext); return ID;}
. ;
%%