What is needed for a C++ member function of a class to behave polymorphic?
Please can anyone answer me to this, and if you can give me some example. Thanks.
viki0077 0 Newbie Poster
Danny_501 2 Junior Poster
Look at the C++ section of this link:
wiki: Polymorphism_in_object-oriented_programming
I guess the talk() function is behaving polymorphic, because its in each of the inherited classes.
viki0077 0 Newbie Poster
Thank you.
NicAx64 76 Posting Pro
Look at the C++ section of this link:
wiki: Polymorphism_in_object-oriented_programmingI guess the talk() function is behaving polymorphic, because its in each of the inherited classes.
No you are wrong according to what I have learn. There are
two types of polymorphism. Dynamic and static. Study them
carefully.
Even overloading is also one category of polymorphism ,it's
static polymorphism. In java yes , but in C++ a non virtual
overriding is also a static polymorphism. Please correct me
if I wrong. I even not read this very carefully.
and the dynamic polymorphism is implemented using the virtual
keyword in the C++.
and there are many old "C" style of ways to implement the
dynamic polymorphism , shuch as function pointers . But now
in C++ use virtual functions is recommanded.
Danny_501 2 Junior Poster
I wouldn't go as far to say that i am wrong, my answer was just too specific.
if you look at the talk() function, it is actually declared as virtual, so therefore it is an example of dynamic polymorphism.
NicAx64 76 Posting Pro
anyway take a dictionary and look at the meaning polymorphism ,
means many forms .
for a example you can open a door , or you can open a newspaper or
you can open a file. So there are many different forms for different types
of specifications . ( source: from a famous UML Book).
Most ppl are doing this mistake , this is a common
mistake.
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