Home » Extra libraries, Code snippets, applications etc. » C++ language problems and code snippets » Time for little quiz!
| Re: Time for little quiz! [message #17892 is a reply to message #17891] |
Tue, 02 September 2008 08:56   |
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mirek
Messages: 14267
Registered: November 2005
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[quote title=nixnixnix wrote on Mon, 01 September 2008 18:04]ok I am not quite up to understanding the full consequences of the above conversation. However, the bit (excuse the pun) that interests me is:
how many bits does an "int" have when I compile on a 64 bit OS (linux or vista - I am trying both)?
If I want my documents to load and save (using Serialize(Stream&)) between 32 and 64 bit implementations of my software, do I need to replace all "int" with "int32"? I am guessing this is so but what else will I need to change please?
[quote]
It "depends".
With x86-64, int is still 32 bits. And in fact, AFAIK, this is the most common arrangement for 64-bit systems.
To get "true" 64-bit integer, types vary more, but with U++, you can just use "int64".
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char is still 16 bit right?
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char is always 8 bit.
wchar is now 16 bit, but it seems like we have to go 32-bit soon. But that should not affect the existing code too much.
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float is always 32 bit right?
double is always 64 bit right?
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Yes.
Frankly, I do not know  But I believe it is 1 for both GCC and MSC.
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what about String?
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Current implementation 16. May change (before 2007, it was equal to sizeof(void*)).
Mirek
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Time for little quiz!
By: mirek on Tue, 04 April 2006 14:02 |
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Re: Time for little quiz!
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Re: Time for little quiz!
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Re: Time for little quiz!
By: fudadmin on Tue, 04 April 2006 20:04 |
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Re: Time for little quiz!
By: mirek on Tue, 04 April 2006 20:36 |
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Re: Time for little quiz!
By: victorb on Wed, 05 April 2006 10:21 |
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Re: Time for little quiz!
By: mirek on Wed, 05 April 2006 10:53 |
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Re: Time for little quiz!
By: mirek on Wed, 05 April 2006 10:54 |
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Re: Time for little quiz!
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Re: Time for little quiz!
By: mirek on Wed, 05 April 2006 12:04 |
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Re: Time for little quiz!
By: hojtsy on Wed, 05 April 2006 14:26 |
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Re: Time for little quiz!
By: victorb on Wed, 05 April 2006 14:52 |
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Re: Time for little quiz!
By: mirek on Wed, 05 April 2006 14:56 |
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Re: Time for little quiz!
By: victorb on Wed, 05 April 2006 15:04 |
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Re: Time for little quiz!
By: hojtsy on Wed, 05 April 2006 15:50 |
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Re: Time for little quiz!
By: mirek on Wed, 05 April 2006 17:42 |
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Re: Time for little quiz!
By: mirek on Wed, 05 April 2006 14:53 |
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Re: Time for little quiz!
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Re: Time for little quiz!
By: mirek on Thu, 06 April 2006 15:56 |
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Re: Time for little quiz!
By: victorb on Thu, 06 April 2006 16:17 |
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Re: Time for little quiz!
By: mirek on Thu, 06 April 2006 16:25 |
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Re: Time for little quiz!
By: nixnixnix on Tue, 02 September 2008 00:04 |
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Re: Time for little quiz!
By: mirek on Tue, 02 September 2008 08:56 |
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Re: Time for little quiz!
By: nixnixnix on Tue, 02 September 2008 21:54 |
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Re: Time for little quiz!
By: mirek on Wed, 03 September 2008 14:18 |
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Re: Time for little quiz!
By: nixnixnix on Wed, 03 September 2008 16:38 |
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Re: Time for little quiz!
By: mrjt on Wed, 03 September 2008 16:51 |
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Re: Time for little quiz!
By: mirek on Sun, 07 September 2008 10:12 |
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Re: Time for little quiz!
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Re: Time for little quiz!
By: mirek on Wed, 05 April 2006 13:14 |
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