/* File: ch3-01.l (from lex & yacc book by John Levine) */

%{
#include "y.tab.h"
extern int yylval;
%}

%%
[0-9]+  { yylval = atoi(yytext); return NUMBER; }

[ \t]   ;           /* ignore white space */

\n      return 0;   /* logical EOF */

.       return yytext[0];
%%