CODEWITHSUNDEEP
c++
Miroslav Avramov
Miroslav Avramov

Reputation: 107

overload virtual function with different parameters in c++

I want to overload virtual function with different parameters in c++ but it doesn't work.

virtual void Draw( int nDeltaX, int nDeltaY);
virtual void Draw( int nDeltaX, int nDeltaY, bool m_bFlag);

Can you tell me the reason?

Upvotes: 3

Views: 11290

Answers (1)

Wojtek Surowka
Wojtek Surowka

Reputation: 20993

The answer is - because that's the way C++ works. The parameters must be the same. C++11 standard says in 10.3.2:

If a virtual member function vf is declared in a class Base and in a class Derived, derived directly or indirectly from Base, a member function vf with the same name, parameter-type-list (8.3.5), cv-qualification, and refqualifier (or absence of same) as Base::vf is declared, then Derived::vf is also virtual (whether or not it is so declared) and it overrides 11 1 Base::vf.

Upvotes: 6

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