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Make inherited protected to public

Posted on 2002-04-13
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Last Modified: 2010-04-02
Is ther any way to make inherited protected members to public members?
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Question by:hestercybil
  • 3
5 Comments
 
LVL 49

Expert Comment

by:DanRollins
ID: 6939662
You can write some geat/set access functions, but the whole idea of declaring a member variable 'protected' is to prevent public access to it.   Solution:  DOn't declare it 'protected' in the first place.

-- Dan
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LVL 49

Expert Comment

by:DanRollins
ID: 6939666
Oh yes, you can use 'friend' to (effectively) make public a member function that had been declared 'protected', but that is not available for member variables.

-- Dan
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LVL 3

Expert Comment

by:GGRUNDY
ID: 6939677
Is this the sort of thing you are looking for.....?


class CA
{
  protected:
  int m_isVisible;
  };

class CB : protected CA
{
  public:
    using CA::m_isVisible;
  };

class CC
{
  public:
  void Method1();
  };

void CC::Method1()
{
  CB c;
  c.m_isVisible = true;
  }
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LVL 49

Expert Comment

by:DanRollins
ID: 6939708
Here's an idea:  You can make a reference to a variable that looks and acts like that protected variable:

class Base {
public:
     int nPub;
protected:
     int nProt;
};
class Derived:public Base {
public:
     Derived() : nProt(Base::nProt) { };
     int& nProt;
};

void main() {
     Derived oDerived;
     oDerived.nProt= 1;
}
=-=-=-=-=-
If it quacks, it *is* a duck.

-- Dan
0
 
LVL 30

Accepted Solution

by:
Axter earned 150 total points
ID: 6939939
You can do the folowing:
class Base
{
protected:
     int data;
};

class Derive : protected Base
{
public:
     Base::data;
};


int main(int argc, char* argv[])
{
     Derive x;
     x.data = 3;
     printf("x = %i\n",x.data);

     system("pause");
     return 0;
}
0

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