[Flex-help] premature EOF

[Yanela S. <ai...@ho...>]

Hi,

I'm trying to make a scanner for an assignment, but I always get the error "premature EOF". I've been learning how to use Flex only since today, but I've been trying and comparing different examples and I don't see what's missing in my file (I understand the user code is optional). I hope someone can explain how to fix it.

This is it:
-------------------

%{ 
     %}

ID      [a-z][a-z0-9]*
OPAR    \(
CPAR    \)
OPLOG   \.[AND|OR|NOT]\.
OPREL   \.[LT|LE|GT|GE|EQ|NE]\.

%%

{ID}+ {printf("Identificador: %s", yytext);}
{OPREL}+ {printf("Operador relacional: %s", yytext);}
{OPLOG}+ {printf("Operador Lógico: %s", yytext);}
{OPAR}+ {printf("Paréntesis de apertura: %s", yytext);}
{CPAR}+ {printf("Paréntesis de cierre: %s", yytext);}

%%


-----------------

Thanks in advance for any help.

Yane
 		 	   		  
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