29/06/2008, 20h31
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#3
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Re: Memory layout of class
Peskov Dmitry wrote:
> Hi,
> What is the memory layout of an object, and the derived object.
> For example :
>
> class A
> {
> private:
> int prv_data;
> protected:
> int pro_data;
> public:
> int pub_data;
> A(){prv_data = 10;}
> void Aprint();
> };
>
> class B : public A
> {
> int pro_data;
> public:
> void Bmember1();
> void Bprint();
> };
>
> Does it depend on the compiler ?
>
> int main()
> {
> B b;
> int *ptr;
>
> ptr = (int *)&b;
> *ptr = 1000;
> ptr++;
> *ptr = 2000;
> ptr++;
> *ptr = 3000;
> ptr++;
> *ptr = 4000;
>
> return 0;
> }
>
> is setting only the private element of class A to 1000, rest are not
> being set.
See
http://www.research.att.com/~bs/bs_faq2.html#layout-obj
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