How to get the actual string for a symbol?

[Peng Yu]

I want to get words from a file and print them out. But I'm not sure
how to make yylval a pointer to the string yytext. Could somebody let
me know how to modify the following code so that the string can be
retrieved the symbol WORD.

>yylval_string.l
%option nodefault
%{
# include "yylval_string.tab.h"
%}
%%
[A-Za-z]+ { /*I'm not sure how to make yylval a point to yytext */
return WORD; }
[[:space:]] { /*SPACE*/ }
.       {
 return UNEXPECTED_CHARACTER;
 /*fprintf(stderr, "unexpeced_character: '%s'\n", yytext);*/
 }
%%
>yylval_string.y
%{
#  include <stdio.h>
%}
%token WORD UNEXPECTED_CHARACTER
%%
words:
       WORD { printf("WORD = %s\n", $1); }
       | words WORD { printf("WORD = %d\n", $2); }
 ;
%%
main()
{
  yyparse();
}

yyerror(char *s)
{
  fprintf(stderr, "error: %s\n", s);
}