ch3-03.l		ch3-03.l
	%{		%{
			/* We usually need these... */
			#include <stdio.h>
			#include <stdlib.h>
			/* Include this to use yylex_destroy for flex version < 2.5.9 */
			#include "flex_memory_fix.h"
			/* This is required and is generated automatically by bison from the .y file */
	#include "y.tab.h"		#include "y.tab.h"
			/* Local stuff we need here... */
	#include <math.h>		#include <math.h>
	extern double vbltable[26];		extern double vbltable[26];
	%}		%}
			/* Add this to get line numbers... */
			%option yylineno
	%%		%%
	([0-9]+|([0-9]*\.[0-9]+)([eE][-+]?[0-9]+)?) {		([0-9]+|([0-9]*\.[0-9]+)([eE][-+]?[0-9]+)?) {
	yylval.dval = atof(yytext); return NUMBER;		yylval.dval = atof(yytext); return NUMBER;
	}		}
	[ \t] ; /* ignore white space */		[ \t] ; /* ignore white space */
	[a-z] { yylval.vblno = yytext[0] - 'a'; return NAME; }		[a-z] { yylval.vblno = yytext[0] - 'a'; return NAME; }
	"$" { return 0; /* end of input */ }		"$" { return 0; /* end of input */ }
	\n |		\n |
	. return yytext[0];		. return yytext[0];
	%%		%%
			/* We need to add a main() function.
			* It is more convenient to put it here to manage flex memory management issues.
			* At the minimum it must call yyparse().
			*/
			extern int yyparse();
			int main(int argc, char *argv[])
			{
			printf("Enter sums using + - * / and () or type $ to quit.\n");
			yyparse(); /* REQUIRED */
			yylex_destroy(); /* Add to clean up memory leaks */
			}
End of changes. 4 change blocks.
	0 lines changed or deleted		13 lines changed or added
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