I have created a class say A which has some functions defined as protected.

Now Class B inherits A and class C inherits B. Class A has private default constructor and protected parameterized constructor.

I want Class B to be able to access all the protected functions defined in Class A but class C can have access on some of the functions only not all the functions and class C is inheriting class B.

How can I restrict access to some of the functions of Class A from Class C ?

 Class A
    {
    private A(){}
    protected A(int ){}
    protected calc(){}
    protected allow(){}
    }

    Class B : A
    {} // calc() and allow() should be accessible here 
    CLass C:B
    {
     // calc() should not be accessible here but allow() should be accessible here.
    }