pointer

is it possible to use a pointer to see the data stored in a given
address in the memory ? if no what's the appropriate way to do that?
thanks.

Thu, 03 Jul 2008 21:50:44 +0000, Richard Tobin wrote:

unsigned char *p = (unsigned char *)&a; int i;
>
for(i=0; i<sizeof(a); i++)
printf("%02x ", p[i]);

I think you need %02hhx there, or cast p[i] to (unsigned int).

do you? unsigned char gets promoted to unsigned int right? So why do
some implementations give an hh length modifier? why does the
standard give the h modifier?

viza

Pietro Cerutti <gahr_SPAM_gahr_ME_chwrote:

Richard Tobin wrote:
If the number corresponds to some accessible memory, then it will
work, but you need to be familiar with the details of your operating
system. In a general purpose operating system with virtual memory,
there's not likely to be anything much useful at fixed addresses.
>
Unless you /*are*/ the operating system.

But if you are the S, you shouldn't be asking such fundamental
questions as the P.

Richard

4 Jul 2008 at 0:49, Jens Thoms Toerring wrote:
All you could dump is the mostky rather uninteresting address space of
your program.

the contrary, a core dump can be very interesting indeed when you're
debugging a program. However, on most platforms this sort of memory dump
is generated automatically when your program dies.

If the P is interested in monitoring memory usage within a process, he
might want to check out the source code to valgrind, though I think it's
pretty hardcore stuff.