Accessing protected members in derived class

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In CLI/C++, can a derived class access protected members of based class?
The following code results in error C2248

C++

class B;
Class A{
  protected :
         B b;
         int m;
};
private class C : A
{
  public:
         void method();
}
C::method()
{
      A::m; //  error C2248 : m : cannot access protected members declared
in class A
   
}

How it can be made accessible?

Posted 13-Feb-11 19:32pm

Rajesh G Manwani from Mumbai

Updated 13-Feb-11 21:05pm

Sandeep Mewara

v4

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Sandeep Mewara 14-Feb-11 3:05am

Next time, please use PRE tags to format code part.

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-02-13T19:44:00

As they are protected they are accessible in the derived class by definition of protected. Don't write "B->m", use just m.

By the way, your question is about CLI/C++, some language I am not familiar with. :) I know C++ and C++/CLI. You code is about C++.
Your code shows 9 errors, none of then is the one you describe!
Who are you trying to fool? I think, yourself. Be accurate!
If you don't believe it, try to compile it as is.

As your "code" contains a bug in almost every line, I cannot see a reason to fix it. "Unlearn what you have learned!"

—SA

Nish Nishant · Answer 2 · 2011-02-14T04:21:00

As SA said, your code did not use any C++/CLI and what you pasted will not even compile. Here's the fixed version that will compile, although it has nothing to do with C++/CLI:

C++

class B{};

class A
{
protected :
  B b;
  int m;
};

private class C : A
{
public:
  void method();
};

void C::method()
{
  A::m;
}

Accessing protected members in derived class

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