C ++基础和派生类方法的麻烦

Question

I have 1 base class named AddOns, this class has 9 derived classes. Also I have vector defined as shared_ptr

AddOnsContainer.h

std::vector<std::shared_ptr<AddOns>> container;

Now my problem is that I have defined a method in AddOns

AddOns.h

virtual void ChangeDefaultSearchProvider();

that I want to override in only one of the derived classes (SearchProviders). For every other derived class I want to use the code implemented in AddOns.h. The method is defined as virtual, which should have helped me, but my code still runs the base method for every one derived class even for the one that I have overrode.

Here is the definition from the method from the derived class that should do something different.

SearchProviders.h

virtual void ChangeDefaultSearchProvider() override final;

From here I call the method:

AddOnsContainer.cpp

void AddOnsContainer::ChangeDefaultSearchProvider(int pId)
{
    container[pId]->ChangeDefaultSearchProvider();
}

So could someone help me to understand how should I define the method in my base class, so that later on I can override it in only one of my derived classes.

Otherwise I should implement this method in each derived class, but as I know this is not the idea of OOP and inheritance.

Thank you all in advance!

Best Regards, Mario P.

PS

This is the code where I add items(SearchProviders) to the vector:

SearchProvider searchProviders;

while (searchProviders.FindNext())
{
    add_item(searchProviders);
}

Answer 1

Thank you all for the help!

I found the problem in my code during the process of creating minimal code.

The problem was in: AddOnsContainer.cpp

void AddOnsContainer::ChangeDefaultSearchProvider(int pId)
{
    container[pId]->ChangeDefaultSearchProvider();
}

Because I pass pId directly, and I need to subtract 1, because currently I do not use the Graphic interface and I use only the console variant.

However, as it took me some time to create some minimal variation of my original code I decided to upload it to GitHub with link here in Stackoverflow.

The code can be access via: https://github.com/mariopavlov/C/tree/master/InheritanceExample

Thank you again all! Best, Mario P.