Print the address of pointer

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Hello,

I would like to print address of pointer in order to see if is changing during program run ( exe life ).

I wrote:

C++

char	DebugString[100];
uint8	*m_pPointer;
void *val1 = pPointer;
sprintf_s(DebugString,"pPointer: %d\n",val1);
OutputDebugString(DebugString);

Is it the right way to print address of a pointer?
Should the pointer address be permanent during all exe life?

Thanks,

Tal.

Posted 10-Mar-12 19:15pm

TalSt

Updated 10-Mar-12 21:19pm

Shmuel Zang

v3

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Sergey Alexandrovich Kryukov 11-Mar-12 3:09am

You did not show a declaration of pPointer.
What address do you want to print: of the object pointer by a pointer or a pointer as object?
What's the problem?
What is permanent and what is not depends on your code.
--SA

6 solutions

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The Zetta · Answer 1 · 2012-03-10T19:22:00

Solution 1

I think you need a pointer to pointer. read this :

Pointer to pointer

-------------------------------
Regards

H.Maadani

Posted 10-Mar-12 19:22pm

The Zetta

Shmuel Zang · Answer 2 · 2012-03-10T21:17:00

Solution 2

If you want print the address of the pPointer variable, you can use the & operator to obtain the address of pPointer, like the following:

C++

void *val1 = &pPointer;

Posted 10-Mar-12 21:17pm

Shmuel Zang

André Kraak · Answer 3 · 2012-03-11T01:13:00

Solution 3

Use should use the p specifier[^].

C++

sprintf_s(DebugString,"pPointer: %p\n",val1);

Posted 11-Mar-12 1:13am

André Kraak

jk chan · Answer 4 · 2012-03-11T18:47:00

Solution 4

say p is a integer pointer,(int *p),
if you want to print the addess of p, you can use printf("%p",&p),
if you want to print the address in p you can use printf("%p",p);

Hopes this helps
http://cgmath.blogspot.com
jkchan

Posted 11-Mar-12 18:47pm

jk chan

Satheesh1546 · Answer 5 · 2012-03-11T18:56:00

Solution 5

Hi,

Just change the following line from
sprintf_s(DebugString,"pPointer: %d\n",val1);
to
sprintf_s(DebugString,"pPointer: %u\n",val1);
or
sprintf_s(DebugString,"pPointer: %p\n",val1);

Thanks,

Posted 11-Mar-12 18:56pm

Satheesh1546

perilbrain · Answer 6 · 2012-03-11T22:57:00

I think you can change a little . Using %d however works but better is using %p.
Because addresses are of value DWORD (long)in 32 bit machines. So %d wont be a good idea.

Should the pointer address be permanent during all exe life?

It depends on where the pointer is referring.
Pointer addressing variables in stack region are not permanent.
While those addressing in Data may or may not remain constant.
And those pointing to code segment are permanent throughout exe life..

..Hope you got a solution .... :)