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Article #5195Re: VRAAGJE C/C++
From: Marcus
Date: Sun, 18 May 2003 13:39
Date: Sun, 18 May 2003 13:39
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1867 bytes
kansloos@xs4all.nl wrote:
> In nl.comp.programmeren Ivan Van den Bossche
> <ivan.van.den.bossche@pandora.be> schreef,
>> Hi,
>>
>> Zou er iemand mij kunnen uitleggen wat de volgende functie doet?
>>
>> int TestBit(BYTE val, int intIndex)
>> {
>> return ((val & (1 << intIndex)) > index) ? 1 : 0;
>> }
>>
>
> Hij kijkt of bit 'intIndex' in 'val' aan staat.
>
> Dus val = 000100 (als bits) en intIndex = 2(10-based) dan return true;
> En val = 110111 en intIndex = 3 dan return false;
>
> Dit alles onder de voorwaarde dat index >= 1.
Dit laatste punt volg ik niet helemaal, > is to gewoon groter dan, of
klopt mijn c kennis hier even niet?
Mark
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X-Google-Language: DUTCH,ASCII-7-bit X-Google-Thread: 107324,2cd6db1915f275ab X-Google-Attributes: gid107324,public X-Google-Thread: fcea4,2cd6db1915f275ab X-Google-Attributes: gidfcea4,public X-Google-ArrivalTime: 2003-05-18 06:40:08 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-03!sn-xit-01!sn-xit-08!supernews.com!pd2nf1so.cg.shawcable.net!residential.shaw.ca!news-out.spamkiller.net!propagator2-maxim!feed.newsfeeds.com!feed.uncensored-news.com!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!transit.news.xs4all.nl!newsfeed.xs4all.nl!xs4all!rhinewceros.xs4all.nl!not-for-mail From: "Marcus" <doei@bannerswapnl.com> Newsgroups: be.comp.programming,nl.comp.programmeren References: <CVJxa.7359$1u5.531@afrodite.telenet-ops.be> <3ec78b12$0$49099$e4fe514c@news.xs4all.nl> Subject: Re: VRAAGJE C/C++ Date: Sun, 18 May 2003 15:39:49 +0200 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Lines: 26 Message-ID: <3ec78d27$0$149$e4fe514c@dreader7.news.xs4all.nl> NNTP-Posting-Host: 80.126.79.199 X-Trace: 1053265192 dreader7.news.xs4all.nl 149 80.126.79.199:8273