Author: Alessandro Scotti
Date: 14:32:07 10/02/04
Go up one level in this thread
On October 02, 2004 at 09:24:57, Roman Hartmann wrote:
>On October 02, 2004 at 09:08:36, Reinhard Scharnagl wrote:
>
>>On October 02, 2004 at 08:51:34, Roman Hartmann wrote:
>
>>Well, 0x8A8D67B6 exeeds the range of a signed 4 byte integer.
>>Up to level 80 it might help to use unsigned counters, obove from
>>that level you will need 8 byte counters like Smirf is using here.
>>
>>Reinhard.
>
>Hello Reinhard,
>I'm using long int for perft so that shouldn't be the problem.
>But I just figured out that I was using printf("\nPerft %d: %d (%2.2f)", depth,
>upper-lower ...) instead of printf("\nPerft %d: %u (%2.2%f)", depth, upper-lower
>...) :)
That will buy you an extra bit, but in the most common 32-bit platforms
sizeof(long) is same as sizeof(int). In fact it's for this reason that in the
above printf() you can get away with using "%d" or "%u" without adding the "l"
size prefix (e.g. using "%ld" or "%lu").
You must use something like "long long" (GCC) or "__int64" (MSVC) to get 8 bytes
integers.
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