Experts are tested by Chegg as specialists in their subject area. ChildB c; Virtual, for example, could (and probably should) be assumed by default, and optimised out where unnecessary. * P = & a; p - > func(); if func() function is a virtual function in the base class and it is covered in the derived class, then p - > func() calls the function of the derived class, otherwise it calls the func() function of the base class, whether or not the derived class redefines the func() function. A Scala-like "override" keyword would be much more useful than "virtual". (4) If the function of the derived class has the same name as the function of the base class, but the parameters are different. why is there always an auto-save file in the directory where the file I am editing? (5) If the function of the derived class has the same name as the function of the base class and the parameters are the same, but the base class function has no virtual keyword. In general, a derived class destructor is called before a base class destructor is called. 1. On calling the display () function of the derived class: It prints " Function of derived class " on the console. void say() //override is a list of display ing function parameters in the base class. Not sure of your compiler but most compilers do not throw errors if the control reaches at the end of the function without a return statement, it displays a warning. So, within the main () function, We have created an object "b" of child class "B". CONCEPT: Protected members of a base class are like private members, but they. 2022 Moderator Election Q&A Question Collection. Stack Overflow for Teams is moving to its own domain! Now only one copy of data/function member will be copied to class C and class B and class A becomes the virtual base class. class ChildA:public Base Virtual functions are accessible using object pointers Redefining the virtual function in the derived class is optional, but it needs to be defined in the base class The function call resolving is done at run-time You can create a virtual destructor but not a constructor Using a Virtual Function in C++ If the letter V occurs in a few native words, why isn't it included in the Irish Alphabet? Basically, a virtual function is used in the base class in order to ensure that the function is overridden. Overriding facilitates class polymorphism. Functions only overload if in the same scope. 2022 Moderator Election Q&A Question Collection, Interview question about virtual functions in C++. void fun1(int a) {cout<<"Base fun1(int)"<

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