CODEWITHSUNDEEP
flex-lexeryacclexeof
Sahitya Sridhar
Sahitya Sridhar

Reputation: 119

EOF encountered inside an action LEX program

I have a lex program as follows. I encounter the error

EOF encountered inside an action LEX program 

%{
#include<stdio.h>
#include<math.h>
#include "y.tab.h"
%}
%%
[ \t]+ ;
[0-9]+ {yylval = atoi(yytext);
 return INTEGER;}
[-+*/] {return *yytext;}
"(" {return *yytext;}
")" {return *yytext;}
\n {return *yytext;}
. {char msg[25];
 sprintf(msg,"%s <%s>","invalid character",yytext);
 yyerror(msg);}

Can someone help me out?

Upvotes: 0

Views: 4570

Answers (1)

Brian Tompsett - 汤莱恩
Brian Tompsett - 汤莱恩

Reputation: 5893

This error often occurs if you have an EOF at the end of the text without terminating the last line with an end-of-line, but it can also be system dependent, making it hard to reproduce on other systems.

Ensure there is a blank line after the last line and the error is likely to go away.

Upvotes: 5

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