how it ll simply call the base class constructor ???
As far as i know .....
if we give like.....
class abc
{
abc(int i){.........}
}
class def : public abc
{
def(int i,int j):abc(i)
{........}
// by using like this only u can call base class
//constructor no ??? ..correct me if i m wrong
}
On Aug 1, 11:04 pm, coder dumca <[email protected]> wrote:
> base class constructor are called before derived class construtors.
>
> Base* pBase = new Derived(); statement creates a derived class
> object hence calls derived class condstructor, which calls base call
> constructor. base class constructor calls fun() which prints " Base
> Function".
>
> pls correct me if i m wrong
> On Mon, Aug 1, 2011 at 9:37 AM, sivaviknesh s <[email protected]>wrote:
>
>
>
>
>
>
>
>
>
> > #include<iostream>
> > #include<stdio.h>
>
> > using namespace std;
>
> > class Base
> > {
> > public:
> > Base()
> > {
> > fun(); //note: fun() is virtual
> > }
> > virtual void fun()
> > {
> > cout<<"\nBase Function";
> > }
> > };
>
> > class Derived: public Base
> > {
> > public:
> > Derived(){}
> > virtual void fun()
> > {
> > cout<<"\nDerived Function";
> > }
> > };
>
> > int main()
> > {
> > Base* pBase = new Derived();
> > delete pBase;
>
> > getchar();
> > return 0;
> > }
>
> > Output:
> > *Base Function*
>
> > See following excerpt from C++
> > standard<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1905.pdf>for
> > explanation.
>
> > *When a virtual function is called directly or indirectly from a
> > constructor (including from the mem-initializer for a data member) or from a
> > destructor, and the object to which the call applies is the object under
> > construction or destruction, the function called is the one defined in the
> > constructor or destructor’s own class or in one of its bases, but not a
> > function overriding it in a class derived from the constructor or
> > destructor’s class, or overriding it in one of the other base classes of the
> > most derived object.*
>
> > Because of this difference in behavior, it is recommended that object’s
> > virtual function is not invoked while it is being constructed or destroyed.
> > See this
> > <https://www.securecoding.cert.org/confluence/display/cplusplus/OOP30-...>for
> > more details.
> > ..............CAN ANYONE GIVE A SIMPLE EXPLANANTION?? given explanation is
> > quite confusing....
>
> > --
> > Regards,
> > $iva
>
> > --
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