Virtual c'tor
Author
Suppos I have this code:
class A {
public:
virtual A ();
};
class B: public A {
public:
B ();
};
B obj;
For obj, will the A c'tor be called automatically within the call to B c'tor?
or do I need to call A c'tor explicitly.
Constructors are implicitly static. Hence, they can't be virtual.
Have a look at something like a "class factory" for constructing types based on information at runtime.
Have a look at something like a "class factory" for constructing types based on information at runtime.
Quote:Original post by The C modest god
For obj, will the A c'tor be called automatically within the call to B c'tor?
yes, always. you can't declare it virtual but child class constructors always get called. it's just the destructor that needs to be virtual.
-me
Author
Quote:Original post by PalidineQuote:Original post by The C modest god
For obj, will the A c'tor be called automatically within the call to B c'tor?
yes, always. you can't declare it virtual but child class constructors always get called. it's just the destructor that needs to be virtual.
-me
You mean parent c'tor will be called?
I call B(the child) c'tor and A(the parent) c'tor will be automatically called?
> You mean parent c'tor will be called?
> I call B(the child) c'tor and A(the parent) c'tor will
> be automatically called?
Yes.
> I call B(the child) c'tor and A(the parent) c'tor will
> be automatically called?
Yes.
It would be easier and faster just to put print statements in the base and derived classes to figure out this behavior, FYI.
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