Re: g++/gcc : Floating point issue

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is not a GCC issue.

The 'double' type has a finite precision. Your number is almost certainly
being approximated to the nearest representable value.

The only ways to deal with this are to:
(1) arrange your calculations so that finite precision is not an issue, or
(2) use a different data format.

If you're interested in option (2), GMP might meet your needs:

    http://www.swox.com/gmp/

Neil.

abuzer.salik@xxxxxxx wrote:
Hi,

I have an application which uses double values a lot. If I try to put say
401.74 in a double variable it is getting stored as 401.74000000000001
which creates problem in the calculations down the line. ( I am checking
these values using gdb debugger).

So, I am wondering if there is a way by which I can store the correct
values (i.e. 401.74) in the double.

We are using g++ compiler on Linux box.

Do we need to look for another compiler/hardware or current setup can
handle this?

Any suggestion/solution is highly appreciated.

Regards,
Abuzer Salik

[Index of Archives]     [Linux C Programming]     [Linux Kernel]     [eCos]     [Fedora Development]     [Fedora Announce]     [Autoconf]     [The DWARVES Debugging Tools]     [Yosemite Campsites]     [Yosemite News]     [Linux GCC]

  Powered by Linux