Re: unsigned 16 digit integer data type?
Re: unsigned 16 digit integer data type?
- Subject: Re: unsigned 16 digit integer data type?
- From: Dan Sugalski <email@hidden>
- Date: Wed, 5 Nov 2003 08:30:12 -0500 (EST)
On Wed, 5 Nov 2003, Ben Dougall wrote:
>
On Tuesday, November 4, 2003, at 11:49 pm, Henry McGilton wrote:
>
>
> On Tuesday, November 4, 2003, at 02:27 PM, Clark Cox wrote:
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>
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>> On Nov 04, 2003, at 16:21, Matt Gillette wrote:
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>>
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>>>> how can you print a long long out?
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>>>
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>>> To print out unsigned long long, use %q (quad - I think)
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>>>
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>>>> what's the maximum value of a unsigned long long?
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>>>
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>>> Not sure, but wouldn't it be 2^64 - 1?
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>>
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>> Yes, but remember that that is the maximum guaranteed value (a
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>> compiler/platform is free to support larger sizes)
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>>
>
>
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> Also think about using the uint64_t typedef rather than
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> explicitly spelling out unsigned long long.
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>
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> The maximum value of a 64-bit unsigned would be 2 ^ 32 * 2 ^ 32 - 1,
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> or 18,446,744,073,709,551,615 --- that is more than eighteen
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> million trillion. Certainly big enough for sixteen decimal
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> digits.
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>
off list someone suggested double. and that seems to work fine. is
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double better option for 16 decimal digit values maybe?
Nope. Doubles can't quite hold 16 digits--their maximum precision is
something like 15.2 digits. Use a 64-bit int, you get another 11 bits of
precision which is more than enough to handle 16 decimal digits.
Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
email@hidden have teddy bears and even
teddy bears get drunk
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