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C++ Type Double Pointers
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AlbanainRetard
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PostPosted: Sun Mar 15, 2009 8:05 pm    Post subject: C++ Type Double Pointers Reply with quote
I can change a Dword pointer easily but A double pointer is fooling me:

ie.

*(DWORD*)(*(DWORD*)MyBase + 0x30) = 100000;

But when I try to do double I have trouble I have tried:
DOUBLE RealFrogBase = *((DOUBLE*)FrogBase) + 0x8;
*(DWORD*)(*(DWORD*)RealFrogBase + 0x30) = (DOUBLE)100000.0;

INT FrogBaseNext = (*(DWORD*)FrogBase + 0x8); //Add 8
*(DOUBLE*)(*(DWORD*)FrogBaseNext +0x30) = 100000;

Got any suggestions? I also found this, I am reading through the thread:

http://forum.cheatengine.org/viewtopic.php?t=276729&start=0&postdays=0&postorder=asc&highlight=&sid=bdd30896cdc119a553b12e9ca6518699
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hcavolsdsadgadsg
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PostPosted: Sun Mar 15, 2009 8:52 pm    Post subject: Reply with quote
or you could just read a book or something and actually learn the subject...

void?
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lurc
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PostPosted: Sun Mar 15, 2009 9:15 pm    Post subject: Reply with quote
I agree with slovach.
You and all the other trolls that have just suddenly started pouring yourself in the general programming section.

I suspect you all know who you are Rolling Eyes.

On-topic:
Read 8 bytes and cast as a double. (memcpy/__movsb)
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AlbanainRetard
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PostPosted: Sun Mar 15, 2009 9:44 pm    Post subject: Reply with quote
lurc wrote:
I agree with slovach.
You and all the other trolls that have just suddenly started pouring yourself in the general programming section.

I suspect you all know who you are :roll:.

On-topic:
Read 8 bytes and cast as a double. (memcpy/__movsb)


would I mem copy to an array? Or memcpy to a double??

memcopy(array or double,Base,8);
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&Vage
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PostPosted: Sun Mar 15, 2009 10:06 pm    Post subject: Reply with quote
Code:

double watwat = 0.00;

memcpy( (double)watwat, (void*)addr, 8 );


wat.
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AlbanainRetard
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PostPosted: Sun Mar 15, 2009 10:09 pm    Post subject: Reply with quote
S3NS4 wrote:
Code:

double watwat = 0.00;

memcpy( (double)watwat, (void*)addr, 8 );


wat.


Thanks S4NS3

Rep + (if can)

EDIT:

5456 seconds
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&Vage
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PostPosted: Sun Mar 15, 2009 10:11 pm    Post subject: Reply with quote
AlbanainRetard wrote:
S3NS4 wrote:
Code:

double watwat = 0.00;

memcpy( (double)watwat, (void*)addr, 8 );


wat.


Thanks S4NS3

Rep + (if can)

EDIT:

5456 seconds

S3NS4.
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AlbanainRetard
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PostPosted: Sun Mar 15, 2009 10:24 pm    Post subject: Reply with quote
S3NS4 wrote:
AlbanainRetard wrote:
S3NS4 wrote:
Code:

double watwat = 0.00;

memcpy( (double)watwat, (void*)addr, 8 );


wat.


Thanks S4NS3

Rep + (if can)

EDIT:

5456 seconds

S3NS4.


1>c:\users\mike williams\desktop\my\code\hacks\albanain\main.cpp(2Cool : error C2440: 'type cast' : cannot convert from 'DOUBLE' to 'void *'
1>c:\users\mike williams\desktop\my\code\hacks\albanain\main.cpp(2Cool : error C2664: 'memcpy' : cannot convert parameter 1 from 'double' to 'void *'

DOUBLE FrogBase = 0x00994658;
double FrogDouble = 0.0;
memcpy( (double)FrogDouble, (void*)(FrogBase+0x8), 8 );
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&Vage
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PostPosted: Sun Mar 15, 2009 10:42 pm    Post subject: Reply with quote
oops try replacing double with void*. I never messed with doubles before.
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AlbanainRetard
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PostPosted: Mon Mar 16, 2009 12:57 am    Post subject: Reply with quote
S3NS4 wrote:
oops try replacing double with void*. I never messed with doubles before.


Two:

1. This compiles
Code:

DOUBLE FrogBase = ;//Removed for reasons
            DOUBLE FrogNew1 = *((DOUBLE*)&FrogBase) + 0x8;
            DOUBLE FrogNew2 = *((DOUBLE*)&FrogNew1) + 0x30;
            
            DOUBLE FrogValue = 100000.0;
            
            memcpy((void *)&FrogValue,(void *)&FrogNew2,8);


But doesn't that get the value of that pointer, ie: 1000.

2. So this would be to set it?

memcpy((void *)&FrogNew2, (void *)&FrogValue, 8 );

But the desired effect does not work.
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Jani
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PostPosted: Mon Mar 16, 2009 3:38 am    Post subject: Reply with quote
Do you have any idea how are you casting your pointers and why? I'd break down the very first DWORD pointer thing and study how it works. Then do the same for doubles. Memcpy is a little useless if you just fixed your pointers and their offsets. By breaking it down I mean something like this:
Code:
double *base = addy;
double value = 0;
base += offset;
value = *base;
Then after analyzing the stuff you actually do, you could try doing it with pure casting. Besides, I think Irwin wrote a ReadPtr function and posted it here. You could try it, but I think it was limited to 4 bytes -> Just do it twice, but add 4 bytes to your addy on the second time :)

The code which comples, fails at pointers too (I'd guess, no idea how's your struct, but I bet it's not like you write the code.)

S3NS4 seems to have no idea about pointers either. Double is just an another type, there's no difference to int when it comes to pointers.
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kitterz
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PostPosted: Mon Mar 16, 2009 8:29 am    Post subject: Reply with quote
Code:
*(DWORD*)(*(DWORD*)MyBase + 0x30) = 100000;



>>

Code:
*(double*)(*(double*)MyBase + 0x30) = 100000.00;



O.O ?
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AlbanainRetard
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PostPosted: Mon Mar 16, 2009 11:42 am    Post subject: Reply with quote
kitterz wrote:
Code:
*(DWORD*)(*(DWORD*)MyBase + 0x30) = 100000;



>>

Code:
*(double*)(*(double*)MyBase + 0x30) = 100000.00;



O.O ?


Already tried that: error C2440: 'type cast' : cannot convert from 'double' to 'double *'

and with "DOUBLE" it says wrong type.
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BanMe
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PostPosted: Mon Mar 16, 2009 2:37 pm    Post subject: Reply with quote
iono...
Code:

DWORD MyBase;
*(double*)((DWORD)(MyBase+0x30)) = 100000.00;


regards BanMe
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samuri25404
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PostPosted: Mon Mar 16, 2009 3:12 pm    Post subject: Reply with quote
Code:

*(double*)(*(DWORD*)MyBase + 0x30) = 100000.00

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