Re: virtual function in inherited class not getting called
Angus wrote:
I have a base class CEventSelect a bit like this:
class CEventSelect
{
virtual void OnConnected();
}
and a network interface class a bit like this:
class networkinterface : public CEventSelect
{
virtual void OnConnected();
}
The base CEventSelect class calls it's OnConnected() function when a
client receives notification from the network that it is connected.
But I wanted my networkinterface::OnConnected() method to be called?
But it wasn't. I understand polymorphic functions and I think I
understand why it is not working the way I wanted. Because
CEventSelect calls its own OnConnected() method does mean that the
inheriting OnConnected() will be called. But this is the behaviour I
want.
The actual connection is notified by the base class - but I want my
interface class to someone get notified of the connection.
How can I get the networkinterface class to be notified about the
connection?
I don't know how your code was written,
But I guess the following code may help.
#include <iostream>
class CEventSelect
{
public:
virtual void OnConnected() { std::cout << "CEventSelect" <<
std::endl; }
};
class networkinterface : public CEventSelect
{
public:
virtual void OnConnected() { std::cout << "networkinterface" <<
std::endl; }
};
void call1(CEventSelect event)
{
event.OnConnected();
}
void call2(CEventSelect& event)
{
event.OnConnected();
}
void call3(CEventSelect* event)
{
event->OnConnected();
}
int main()
{
networkinterface ni;
call1(ni); // by value
call2(ni); // by reference
call3(&ni);// by address
}
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