[Help]pointers

so i know the basics of pointers and what they do.
i just don't know why they are used in some ways.
for example: (int*)[addy]
does this mean that it is a pointer to the address with a int value?
and also: *(int*)[addy] - what does this mean?
thanks in advance

[php]
(int*)(Address)
[/php]

Casting the address as a pointer so you can point to it.

[php]
*(int*)(Address)
[/php]

Pointing to the pointer-casted address.

Code:

int * x = *(int*)[addy]

is the same as

Code:

int * x = &y

NO! definitly NOT!!!

example:

Code:

int * pVal = 0x337456;

that means that pVal is a pointer to an int variable
pVal is = 0x337456 so it points to your memory at 0x337456 and

Code:

int cont = *pVal;

gives you the content of pVal

Code:

int Var = 0;
int * pVal = &Var; //the & gives you the address of Var so pVal is now the address of Var

int content = *pVal; //Now in content you got the content of the pointer where pVal points to. It is the same as
int content = Var;

For you example:

Code:

int * x = *(int*)ADDY;

results in the same as

Code:

int * x = y;

and

Code:

int * x = &y;
writes in x the address of y
with
int z = *x;
you can get the value that is in y

I hope I helped you a bit but the best way to learn with pointers is to try some easy programmes with it.

EDIT:
i found this on google:
credits of this pic to
tenouk.com or so...

Holy fuck I hate pointers, I use them all the time and I still don't understand this shit.
~lilneo

Lol, they're so easy >.>

If you still have trouble with pointers:
Pointers

Credits to Void for the link in another post:
http://www.mpgh.net/forum/3159147-post8.html

[Help]pointers

Post a Reply

Tags for this Thread