Re: Call to a virtual method crashes

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Doug Harrison [MVP] (dsh_at_mvps.org)
Date: 02/15/05 

Date: Mon, 14 Feb 2005 21:34:51 -0600

Frank Hickman [MVP] wrote:

>You've changed the functions virtualness. You need to declare them virtual
>in both the base and derived class.

It doesn't matter. For better or worse, the following are equivalent:

struct X
{
   virtual void f();
};

struct Y1 : X
{
   virtual void f();
};

struct Y2 : X
{
   void f();
};

Both Y1::f and Y2::f override X::f. 

-- 
Doug Harrison
Microsoft MVP - Visual C++

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