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To: slg3@lehigh.edu (SAMUEL L. GULDEN) Subject: Re: Flex problem In-reply-to: Your message of Thu, 02 Mar 2000 12:29:04 PST. Date: Thu, 02 Mar 2000 23:00:46 PST From: Vern Paxson <vern> If this is exactly your program: > digit [0-9] > digits {digit}+ > whitespace [ \t\n]+ > > %% > "[" { printf("open_brac\n");} > "]" { printf("close_brac\n");} > "+" { printf("addop\n");} > "*" { printf("multop\n");} > {digits} { printf("NUMBER = %s\n", yytext);} > whitespace ; then the problem is that the last rule needs to be "{whitespace}" ! Vern