how to read memory address and get its value

[Owyn]

hi, i want to read memory at adress 02804C20 and get its value, this should be simple but i'm a little new at this ^^

it should be something like
char txt[512];
txt = value.from.memory.at(02804C20);

[Skizmo]

memcpy (txt, (char*)(02804C20), sizeof(txt));

Why do you want to read something from a static memory address ?

[Owyn]

i thougt i'd need a pointer at first too, but address was fully static

[Skizmo]

i thougt i'd need a pointer at first too, but address was fully static

Memory addresses change every time you run your program... that's why I asked.

[Owyn]

memcpy (txt, (char*)(02804C20), sizeof(txt));

Why do you want to read something from a static memory address ?

that gives me errors =\
wrong syffix for number
bad number 8 for base 8
sint error: no ) before C20
sint error: no )

[Skizmo]

oops.. my bad...

memcpy (txt, (char*)(0x02804C20), sizeof(txt));

[Owyn]

thx) works

btw sizeof(text) returns real size of text or its maxsize? or maxsize was maxsizeof(txt) ?

[Skizmo]

char txt[512];

sizeof(txt) is 512. It returns 512 * sizeof(char).

[Owyn]

plus, how do i get value from 4 bytes address into an int ?

ps-how do i get the real size? like if char = '12345" so it'd be 5 or 6

[Skizmo]

like if char = '12345" so it'd be 5 or 6

strlen

[Owyn]

strlen

thx, but what about int value? i have an adress 4 bytes which has a number, i need this number to count things

[Paul McKenzie]

i thougt i'd need a pointer at first too, but address was fully static

You didn't answer the question.

Why do you want to read the memory at a certain address? What application are you writing that requires this?

Regards,

Paul McKenzie

[Owyn]

You didn't answer the question.

Why do you want to read the memory at a certain address? What application are you writing that requires this?

Regards,

Paul McKenzie

an opengl game, i looked for a pointer but it was the address itself or something like that

[Lindley]

Unless you're working with very specialized hardware, there's almost no reason ever to hard-code a particular address.

[hoxsiew]

If you have a pointer, you can just dereference it (assuming you know what kind of data it is pointing at). I think you're missing some simple C++ concept here (or you're trying to cheat at the game).