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yeah, I realize they are hex representation.. I just wasn't sure why you'd choose one defintion over the other. &nbsp;the intent to test bit combinations makes perfect sense. <br />
<br />
thanks!<br />
-Paul
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yeah, I realize they are hex representation.. I just wasn't sure why you'd choose one defintion over the other.  the intent to test bit combinations makes perfect sense.

thanks!
-Paul

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I'm looking at some code, this is purely an example, but I see often things like this:<br />
<br />
--------------------------<wbr />---<br />
#define WRITEMODE_TRACKATONCE &nbsp; &nbsp; &nbsp; &nbsp; 0x00<br />
#define WRITEMODE_DISCATONCE &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0x01<br />
#define WRITEMODE_DISCATONCE_RAW &nbsp; &nbsp; &nbsp;0x02<br />
#define WRITEMODE_SESSIONATONCE &nbsp; &nbsp; &nbsp; 0x03<br />
#define WRITEMODE_PACKET_VARIABLE &nbsp; &nbsp; 0x04<br />
#define WRITEMODE_PACKET_FIXED &nbsp; &nbsp; &nbsp; &nbsp;0x05<br />
<br />
#define DISCTYPE_CDR &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0<br />
#define DISCTYPE_CDRW &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1<br />
#define DISCTYPE_DDCDR &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2<br />
#define DISCTYPE_DDCDRW &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3<br />
#define DISCTYPE_DVDR &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 4<br />
--------------------------<wbr />----------<wbr />--<br />
<br />
<br />
that's from a CD write/read library.. My question is, why are constants defined at times like 0x02 &nbsp;and at other times, 2 (for example) What is the fundamental difference and when choosing to go with an 0x type value, from where to do you define the values??<br />
thanks<br />
-paul
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I'm looking at some code, this is purely an example, but I see often things like this:

-----------------------------
#define WRITEMODE_TRACKATONCE         0x00
#define WRITEMODE_DISCATONCE          0x01
#define WRITEMODE_DISCATONCE_RAW      0x02
#define WRITEMODE_SESSIONATONCE       0x03
#define WRITEMODE_PACKET_VARIABLE     0x04
#define WRITEMODE_PACKET_FIXED        0x05

#define DISCTYPE_CDR                  0
#define DISCTYPE_CDRW                 1
#define DISCTYPE_DDCDR                2
#define DISCTYPE_DDCDRW               3
#define DISCTYPE_DVDR                 4
--------------------------------------


that's from a CD write/read library.. My question is, why are constants defined at times like 0x02  and at other times, 2 (for example) What is the fundamental difference and when choosing to go with an 0x type value, from where to do you define the values??
thanks
-paul

Question on #define values

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