Assigning a value to an address

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:

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

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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?

Code:

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

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Ok, this is what I have:

Code:

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

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

This is with DJGPP.

Quote:

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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.

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you have to explicitly typecast

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

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.