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%{
#include <math.h>
#include <string.h>
#include "regn.tab.h"
%}
realtal ([0-9]+|([0-9]*\.[0-9]+))([eE][-+]?[0-9]+)?
op_log log
op_exp exp
op_sqrt sqrt
%%
{realtal} {yylval.dval = atof(yytext);
return TAL;}
{op_log} {return LOG;}
{op_exp} {return EXP;}
{op_sqrt} {return SQRT;}
[ \t] ;
'$' {return 0;}
\n|. {return yytext[0];}
%%
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