I have a Derived template class that inherited from a Base template class. The Base class has a pure virtual method and protected attribute which I am using in the implemented version Derived class. However whenever I use the inherited attribute in the implement version of the pure virtual function I get ‘identifier not found’ and ‘undeclared identifier’ error.

I am using visual studio 2022 editor

Here is my code:

#include <iostream>

template <class T>
class Base {
public: 
    T a{};

    virtual void someVfunc1() = 0;

protected: 
    T b{};
    T c{};
};


template <class T>
class DerivedClass: public Base<T> {
public:

    void saysome() {
        b = 23; 
        std::cout << "some = " << b << std::endl;
    }

    void someVfunc1() {
        b = 44;
        std::cout << "some = " << b << std::endl;
    }

    DerivedClass() {};

};


int main() {
    DerivedClass<int> d{};
    d.saysome();
    d.someVfunc1();

    return 0;
}

in both method call I keep getting C2065: 'b': undeclared identifier and error C3861: 'b': identifier not found

However if I remove the templating for the classes, It runs perfectly.

How can I get it to run even with the templating format