Re: VRAAGJE C/C++

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#5193

From: Bert Peers
Date: Sun, 18 May 2003 13:28

16 lines
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Marcus wrote:

>>>>int TestBit(BYTE val, int intIndex)
>>>>{
>>>>    return ((val & (1 << intIndex)) > index) ? 1 : 0;
>>>>}
> val & (1 << intIndex))
> oplevert of de intIndexde bit van val 1 of 0 is, en dat gedeelte met >
> index zie ik het nut niet van in, zolang ik de context niet snap (index
> is kennelijk een globale variabele, maar waar staat die dan voor.

Wellicht voor een "negeer" masker.  Als index bv 0x0f is, gaan
de vier meest rechtse bits false opleveren, of ze nu gezet zijn
of niet.  Niet zo'n hippe code, dit.

Bert

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Subject: Re: VRAAGJE C/C++
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