On 9 September 2011 12:04, Nicholas Tollervey <ntoll at ntoll.org> wrote: > Roman Numeral Calculator - e.g. XI - III = IIX (Apparently, it's not as easy as you'd think. Parsing / converting between Roman numerals / numeric values apparently has some interesting "weird" rules to take into account). :-) Would it be more useful to make a Roman numeral data type?