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Re: [Help-gsl] strange behaviour of addition of floats and exponential f

From: Jordi Gutiérrez Hermoso
Subject: Re: [Help-gsl] strange behaviour of addition of floats and exponential function
Date: Wed, 26 Jan 2011 17:11:12 -0600

2011/1/26 Chandra Sekhar Mallarapu <address@hidden>:

> From: Jordi Gutiérrez Hermoso address@hidden

> On 26 January 2011 09:18, Chandra Sekhar Mallarapu
> <address@hidden> wrote:
>> I am trying to do C=A+B, where
>> A=0.0000000000000000021675312011946934078589202290913712085038187871567725434340800916288571897894144058
> What data types are A, B, and C? I don't think there are any float
> types in any common architecture that are broad enough to be accurate
> to that many digits.
> A, B, C are double data type in C. Even if its not accurate till the
> last digit, shouldn't it be accurate to some digits atleast?

I think you ought to consult

for a brief overview and

more a more in-depth treatment.

In short, your expectations of how floating point arithmetic works
need refinement.

- Jordi G. H.

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