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From: Shark8 <onewingedshark@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: How do I write directly to a memory address?
Date: Tue, 8 Feb 2011 13:31:29 -0800 (PST)
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Date: 2011-02-08T13:31:29-08:00
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On Feb 8, 1:44=A0pm, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:
>
> The next test was this:
>
> =A0 =A0x and FF =3D ?
> =A0 =A0x or FF =3D ?
> =A0 =A0x xor FF =3D ?
>

...w.t.f.
That's insane... how is it I'm not even getting to the interview
stage?
I could do that; though I'm loathe to in C/C++.

// we do have a bool type on this compiler, no?
bool and ( int v1, int v2 )
{ int result =3D 0;
 for (int index =3D 7; index>=3D0; --index)
 { result |=3D (( v1>>index && v2>>index ) && 1) << index; }
return result;
}

bool or ( int v1, int v2 )
{ int result =3D 0;
 for (int index =3D 7; index>=3D0; --index)
 { result |=3D (( v1>>index || v2>>index ) && 1) << index; }
return result;
}

bool xor ( int v1, int v2 )
{ int result =3D 0;
  int not_and =3D !and( v1, v2 );
  int _or =3D or( v1, v2 );
 for (int index =3D 7; index>=3D0; --index)
 { result |=3D (( not_and>>index && _or>>index ) && 1) << index; }
return result;
}