Erik de Castro Lopo wrote:
O Plameras wrote:
Many books in C programming teaches that 64-bit machines have 8 bytes
int size, at least the ones I gone through.
I have never personally seen such a book.
What did you say about Basic Data Types in your book as it is essential
to know and differentiate between these types ? and as C is closely bound
to hardware architecture you must have said something about these data
types as it relates to 16-bit/32-bit/64-bit ?
I have not gone through your book
that you
co-authored. Did you or your book say anything about int sizes in
relation to
machine architecture ? And what did you say there ? I'm curious ?
I wrote a program like your sizeof program (but including sizeof(void*))
Well that's good idea. I was writing for myself and I always assume the
pointer
must cover the whole range of possible addresses, 2 exp (32-1) - 1 in
32-bit; and
2 exp (64-1) -1 in 64-bit. And so sizeof (void *) is sort of "understood
you". But
we just learned the authors of C programming books as well as CPU
manufacturers
don't necessarily agree with each other in terms of what they say and
what they
make. We must check first-hand, no problem there.
And, also, in that case I should also include "sizeof(unsigned)" which
in C programming
is usually the same as sizeof(int). But we learned again that we must
satisfy ourselves
first hand.
and showed the output on a 32 bit x86 Linux machine and a 64 bit Alpha
Linux machine. The sizes of all data types other than long and void*
were the same.
Erik
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O Plameras
http://www.acay.com.au/~oscarp/tutor
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