ch2-04.l

%{
unsigned verbose;
char *progName;
%}

%%

-h  |
"-?"  |
-help  { printf("usage is: %s [-help | -h | -? ] [-verbose | -v] "
   "[(-file| -f) filename]\n", progName);
  }
-v  |
-verbose { printf("verbose mode is on\n"); verbose = 1; }

%%

int main(int argc, char **argv)
{
  progName = *argv;
  yylex();
}

int yywrap()
{
  return 1;
}