/*
* expr.lex : Scanner for a simple
*            expression parser.
*/

%{
#include "y.tab.h"

%}

%%

[0-9]+     { yylval.val = atol(yytext);
            return(NUMBER);
          }
[0-9]+\.[0-9]+ {
            sscanf(yytext,"%f",&yylval.val);
            return(NUMBER);
          }
"+"        return(PLUS);
"-"        return(MINUS);
"*"        return(MULT);
"/"        return(DIV);
"^"        return(EXPON);
"("        return(LB);
")"        return(RB);
\n         return(EOL);
[\t ]*     /* throw away whitespace */
         { yyerror("Illegal character");
            return(EOL);
          }
%%

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