hi
Your code was very useful for me.I hve a doublt.You hve used double data type for handling numbers.Suppose if u want to handle very large numbers then wat you can suggest me like the windows calculator
You can read the large number into a string data type, then parse it into multiple double data types and perform your desired operations and then re-combine them.
May be it's not that straight, as it seems, but you will have to write an algorithem for it.