How to modify private member variable of any class

[Cedric Moonen]

:~ You mean, from an external class ? What would be the use of private, protected and public keywords then ? What are you trying to do ?

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Cédric Moonen Software developer
Charting control [v1.2]

[Nishad S]

If that class declares your function or class as a friend, then you can access. I think you are asking not for that. If so you just cast the class object to BYTE* and you can access the memory. Or, if you are aware the class structure then you can create a dummy class with all the member variables as public and can cast the actual object to that of this dummy class. Thus you can access the members.

- NS -

[Neo Andreson]

Thanks for your kind reply. Ya then there is no meaning of private access specifier but i heard abt it that though it is violation of object oriented concepts but still it is possible in C++ using pointers. I am not trying to do anything great but just trying it out and i believe it is possible. -- modified at 4:59 Wednesday 31st October, 2007

[followait]

It may be compiler dependent, however, you can calculate the memeber address first, and access it directly (not through the object, do something like writing memory).;)

[CPallini]

Usually, you souldn't. Anyway, you can modify a class private member variable inside a friend function (or friend operator, or a method of a friend class ). :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.

[Neo Andreson]

Ya i got it, without using friend function,i did it.. i used typecasted it to char* thanKXXXXXXXXXXx

[Nishad S]

Have a nice crack day... ;)

- NS -

[Neo Andreson]

ThankXXXXXXXXXXx Yes..i do not know it is compiler dependent or not,but using ur second suggestion it is possible.. ThankXXXXXXXXx a lot.

[Neo Andreson]

Thank You!!!!!!!!!!!!!

[codeII]

Here is a dirty trick to do so:

class ClassProtected
{
private:
int m_One;
UINT m_Two;
int m_Three;
};

class ClassPublic
{
public:
int m_One;
UINT m_Two;
int m_Three;
};

ClassProtected test; ClassPublic* pTest = (ClassPublic*) &test; pTest->m_One = 1; pTest->m_Two = 2; pTest->m_Three = 3;

[followait]

I think it's a better way.:-D