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On 07/18/2010 08:04 PM, Floor Terra wrote:
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> On Sun, Jul 18, 2010 at 1:07 PM, Aaron Lewis <aaron.lewis1989@gmail.com> wrote:
>>> What do you mean by "precision"?
>>
>> Kinda of significance digit. For example:
>>  A number `12.340' , and if say it has 2 digits' precision , then we
>> consider the `0' is not accurate , while `.34' is accurate.
> 
> What?!

See:

http://en.wikipedia.org/wiki/Arithmetic_precision

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> 
>>
>> So for a number stored in a double type , how accurate can it be ? (or
>> maybe how many bits in the fixed-point part is accurate)
> 
> http://en.wikipedia.org/wiki/Double_precision_floating-point_format
> 
>>
>> Doesn't matter if it's unsigned or signed , some ideas are cool enough.
> 
> I'd like to see your unsigned double!

Sorry , they're all signed.

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> 
>>
>> Still , use a small part of code , c or c++ , i'm just curious how to
>> make it happen.
> 
> What problem (i.e. homework assignment) are you trying to solve?
> 
> 

Come on , just for fun , someone asks me if i could print out the
maximum number that can be stored in a double type , and the *precision*
of a double type.

For the first , maybe with some bit operations , no good idea from me.

And the second , well i tried to divide 2 by 3 , see when i reaches 7 (
should be 0.66....7 ) ,
may not a clever way.


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Aaron Lewis - PGP: 0x4A6D32A0
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