>Dear daysleeper,
>
>this is what I understand clearly. But I like to avoid to scatter this code in a hundred of existing calculation methods and forget it in new ones. I dislike all the IFs too.
>This is such a boring job. (^.^)
>
>Agnes

I agree. BTW, I was sleeping, but someone was calling. Therefore I woke up, but was too late to pick up the phone (it's in another room). Since I woke up, I decided to check few forums.