| From: | David McMinn |
| Date: | 12 Jun 2000 at 14:22:38 |
| Subject: | pointer arithmatic |
hi all,
whats the "correct" way to add a value to a pointer?
I currently have a couple of ULONG *'s that I'm copying a rectangular area
between. Obviously when I'm done with one row of data I want to increase the
pointers by the modulus of the memory area.
so I simply added (src->width - rectangle->width) onto my pointer to find out
that everything was corrupt although I figured out that I needed to divide the
modulus by 4.
Now, I know that some things work on the size of the pointer (++ increases by 4
etc) but I thought adding a value onto it would simply add that value on? Or
does it always take that value to be the number of ULONGs to add on in this
case?
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