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Why C++ compiler gives this error? Why i can access lol() from B, but can not access rofl() [without parameters]. Where is the catch?
class A { public: void lol(void) {} void rofl(void) { return rofl(0);} virtual void rofl(int x) {} }; class B : public A { public: virtual void rofl(int x) {} }; int _tmain(int argc, _TCHAR* argv[]) { A a; a.lol(); a.rofl(1); a.rofl(); B b; b.lol(); b.rofl(1); b.rofl(); //ERROR -> B::rofl function does not take 0 arguments return 0; } 
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Overloading allows several function definitions for the same name, distinguished primarily through different argument types; it is typically resolved at compile-time. Inheritance allows subclasses to define more special versions of the same function; it is typically resolved at run-time.
Yes of course, overloading in inheritance class is possible in Java. Java compiler detect that add method has multiple implementations. so according to the parameter java compiler will determines which method has to be executed. class Parent { public void add(int a) { System.
Inheritance enable us to define a class that takes all the functionality from parent class and allows us to add more. Method overriding occurs simply defining in the child class a method with the same name of a method in the parent class .
The B::rofl(int) 'hides' the A::rofl(). In order to have A's rofl overloads, you should declare B to be using A::rofl;.
class B : public A { public: using A::rofl; ... }; This is a wise move of C++: it warns you that you probably also need to override the A::rofl() method in B. Either you do that, or you explicitly declare that you use A's other overloads.
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