Help with lex homework :

Lex program must add a new variable to count the lines of the input

When there is an error message enhance it including the line number!

You need to identify a new line and increment this line counter.

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I'm new to lex, if you could explain your solution it will be greatly appreciated!

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CODE GIVEN:

"/*" {

if (cmnt && dbug) fprintf(stderr,

" >>>>>>>> line %d: Possible Nested comment

cmnt = 0;

}

"*/" {

if (!cmnt) printf("%s",yytext); /*print out if it is not in a comment */

cmnt = 0;

}

{ if (!cmnt) printf("%s",yytext);}

%%

int yywrap()

{

return 1;

}

int main()

{

yylex();

}

/*********************************************************************************************************/

Picture of code:

\begin{tabular}{r|r|c|} 6 & int cmnt =0; \\ 7 & & int dbug =0;/ prints out debug statements / \\ 8 & int ln_cnt=2; / Line counter*/ \\ 9 & \end{tabular}