Andy

Thanks for replying. To clarify... in financial

calculations there may be a requirement to resolve

complex mathematical formulae on what are ostensively

rational numbers (fractions) e.g. an exchange price from

a market feed. 4563.23 being involved in a calculation

with 10 other variables each with between 0 and 5 decimal

places. Clearly using floating point representations the

calculations here would result in dramatically inaccurate

answers as not all decimal fractions can be accurately

represented by a floating point number. This is where

rational numbers come in as the allow completely accurate

representations of fractions and support all the standard

mathematical operators.

As stated Boost have such a library

(

http://www.boost.org/boost/rational.hpp) which I have

used in our proprietary trading system and it works a

treat so I was looking to source something like that to

save me the pain of hand rolling it.

BTW this is a templatized class and in practice I have

used int64 as the template parameter.

int64 on its own is not sufficient as the range

representated may not be wide enough in all cases or one

would have to may undue attention to the order of sub-

calculations to guarantee that overflow does not occur.

Hope this clarifies my question.

Cheers

Mike

-----Original Message-----

I'm not sure what your problem is

AFAIK, a "long" in .net is a 64-bit integer. Enough for
most financialapplications surely?

"Mike Friel" <mf****@starmark.biz> wrote in message

news:08****************************@phx.gbl... I am writing an assembly that will be used in a suite
of financial applcations. Naturally I must use integer

arithmetic to ensure the accuracy of my calculations
and in the past [in c++] have used the rational number
class from the Boost libararies. Is there anything out there

like that or for that matter in the framework that I am

missing.

Cheers

Mike

.