What I find interesting is:
1. The printf function is giving a supposedly higher precision in the
mantissa than the iostream cout.
2. I tried with different numbers and the difference between the the
original number and the number
output using printf is equal to some power of 2 minus one.
- Sandip
----- Original Message -----
From: "Ambar Roy" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, January 30, 2002 7:07 PM
Subject: Re: [ilugd]: Trivial C problem (Updated)
> > This explains your second output. However, I am at a loss at the first
> output.
> > While I cant explain that, the fact that the difference is near a power
of
> > 2 suggests that it has got something similar to do with the storage of
the
> > mantissa again.
> essentially u r guranteed a precesion of 6 digits... anything after the 6
> digits is dependent on the number and the storage method used to store the
> floating point number... In fact the first output just happened to be so
> close to the original number. It cud hav been anything.. this is just pure
> luck ;) The mantissa is stored as a floating point number in base 2, and
> this is one of the strange effects of that reason. In fact i remember that
> with ms gwbasic, u cud not store some simple numbers as floating point
> numbers.
>
> Bye,
> /\ |\/| |3 /\ r
>
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