>> As an aside, is an int always the same size as a memory address (ie. 4
> bytes on 32 bit machines, 8 bytes on 64 bit), or is it always 4 bytes?
Not necessarily. For example, compilers on the Alpha typically use a scheme
called LP64, where longs and pointers are 64 bits in size, but ints are 32
bit.
As another example, some 68K compilers on the Mac had 16 bit ints, and 32
bit longs.
AFAIK, all that the C spec requires is that chars are 1 byte and
sizeof(char)<=sizeof(short)<=sizeof(int)<=sizeof(long).
Cheers,
Brian.
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