Assigning a value to an address

stovellp · 02-10-2003

I would like to write a function in C/C++ to copy the letter 'A' to a specific address.

This is what I have:

Code:

int * PAddr = NULL;
	&PAddr = 0xb8f9e;
	PAddr = 'a';

Now that (obviousely) is wrong, but I hope you can understand what I'm asking. There's probably a really simple way to do this, and if there is could you please tell me?

**Panopticon** · 02-11-2003

Code:

PAddr=0x000FFF //or whatever
*PAddr=824;

stovellp · 02-11-2003

Ok, this is what I have:

Code:

int * PAddr;
PAddr= 0xb8f9e  //or whatever
*PAddr='A';

When I try to compile I get the error:
Invalid operands to binary *

This is with DJGPP.

**Polymorphic OOP** · 02-11-2003

Originally posted by stovellp
Ok, this is what I have:

Code:

int * PAddr; PAddr= 0xb8f9e //or whatever *PAddr='A';

When I try to compile I get the error:
Invalid operands to binary *

This is with DJGPP.

you have to explicitly typecast

PAddr = reinterpret_cast< int* >( 0xb8f9e );

**DougDbug** · 02-11-2003

If you're using WinXP, WinNt, or Win2K, I you'll probably get a run-time error 'cause these operating systems don't allow user-mode programs direct access to memory. I think Win98 will work, but the virtual-paged memory might cause trouble. I also think Linux has similar user-mode protection.

Thread: Assigning a value to an address

Thread Tools

Search Thread

Display

Assigning a value to an address

Hmmm... Will your OS allow this?

Similar Threads

What does this do (Windows API)?

assigning a memory address to a pointer

I thought pointers were pointers...

DX - CreateDevice - D3DERR_INVALIDCALL

pointers