%{
#include <iostream>
using namespace std;

/* idea here is to strip comments out of C code.            */
/* INITIAL is the default start state.  Comment is our new  */
/* state where we remove comments.                          */
%}

%s COMMENT
%%
<INITIAL>"//".*         ;
<INITIAL>"/*"           BEGIN COMMENT; 
<INITIAL>.              ECHO;
<INITIAL>[\n]           ECHO;
<COMMENT>"*/"           BEGIN INITIAL;
<COMMENT>.              ;
<COMMENT>[\n]           ;
%%

main() {
  yylex();
}