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Subject: Re: 8 queens problem meets obfuscated C programming

Author: Uri Blass

Date: 05:00:24 04/10/03

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On April 10, 2003 at 07:45:50, Tony Werten wrote:

>On April 10, 2003 at 06:35:07, Uri Blass wrote:
>
>>On April 09, 2003 at 23:56:54, Russell Reagan wrote:
>>
>>>So...who wants to explain how this works? I don't know how it works, but it
>>>finds all of the solutions to the 8 queens problem.
>>>
>>>#include <stdio.h>
>>>int v,i,j,k,l,s,a[99];
>>>void main(void){
>>>for(s=8;*a-s;v=a[j*=v]-a[i],k=i<s,j+=(v=j<s&#38;&#38;(!k&#38;&#38;!!printf(2+"\n\n%c"-(!l<<!j),"
>>>#Q"[l^v?(l^j)&1:2])&&++l||a[i]<s&#38;&#38;v&#38;&#38;v-i+j&#38;&#38;v+i-j))&#38;&#38;!(l%=s),v||(i==j?a[i+=k]=0:++a[i])>=s*k&&++a[--i]);
>>> printf("\n\n");
>>>}
>>
>>I do not understand this code because my C knowledge is not enough.
>
>You don't use pointers in your program ? :)

I do not have * as the beginning of the line.

I have only few things like
gen_t *g;

I also knew that a condition should be in the beginning of the loop so I thought
* may mean some condition(I know that a number can be used as condition but I am
not used to use number as condition so I did not thought about that possibility
when I read the program).

Uri



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