%{
/* 
 * exp.l is the flex specification for 
 * exp.y++. The exp.tab.h++  will be generated
 * bison (yacc) compiler. Compile as
 * $ flex exp.l
 * output: lex.yy.c
 */
#include <stdio.h>
#include <stdlib.h>
#include "exp.tab.h"  /* Generated by bison */
    /* Copied verbatim in lex.yy.c */
%} 

%option noyywrap

DELIM      ([ \t])
WHITESPACES ({DELIM}+)
NATNUM    ([0-9]+) 
FLOAT      (([0-9]*\.[0-9]+)|([0-9]+\.[0-9]*))

%%
{WHITESPACES} { ; }
{NATNUM}      { yylval.integer = atoi(yytext) ; return INT ; }
{FLOAT}       { yylval.real = (float)atof(yytext) ; return FLOAT ; }
"+"           { return (int)'+' ; }
"-"           { return (int)'-' ; }
"/"           { return (int)'/' ; }
"*"           { return (int)'*' ;}
"\n"	      { return (int)'\n';}
"("	      { return (int)'(';}
")"	      { return (int)')';}
%%
/* No C code */