Thread: About inheritance and access specifier

Hi Guys,


I wanted to know about access specifier,if we have a class of "Teacher" as given below and its data members are protected, will
the child class "Student" be able to access the protected data members of the base class "Teacher" even if we make it private inheritance as:

class Student : private Teacher


----------------------------------------------------------------------------

Code:

 
class Teacher
    {
    protected:
    int age;

    public:
 
    bool SetAge(int_age)
    {
     if(_age>=0 && _age<=125)
     {
      age =_age;
      return true;
     }
    return false;
    };
    class Student: private Teacher
     {
      public:
      boolSetAge(int_age)
      {
       if(_age>=18 && _age<=25)
       {
        age = _age;
       return true;
       }
       return false;
       }
      };

-----------------------------------------------------------------------------

At first function SetAge one bracket is missing under return false;
Since int age; is protected you can not just write

Code:

 Student s;
s.age=5;

However you you could use SetAge of class Student,and as a result has access to the protected variable.

Code:

 Student s;
s.SetAge(5);

Until you find a book check out this short example i have in mind(finding a book though is strongly recommended )

Code:

class B : private A {...};

Let PRA stand for private part of class A,PROTA for protected part of class A and PUBA for the public part of class A.
Then the following will be true

Code:

PUBB = PUBB
PROTB = PROTB 
PRB = PRB + PROTA + PUBA