snigdha1

 Profile Answers by snigdha1 

• Jun 4th, 2010

 

Private Inheritance makes all of the public functions of the parent class private in child class. They can be used in order to implement child class without being accessible to outside world.

Syntax: same as public inheritance

Ex: class car:public Vehicle
{
public:
.....
};

here car is derived from Vehicle

navneetgoyal2000

 Profile Answers by navneetgoyal2000 Questions by navneetgoyal2000

• Jan 4th, 2011

 

Private Inheritance is inheriting a (base) class, privately, making all members of Base class, private in derived class. In that case, no objects of derived class OR any member of derived of derived class can access any member function or data of Base class.

Ex:

class B {

private:

int a;

public:

void f1();

}

class D1 : private B {

...

}

class D2 : public D1 {

private:

void f_d2_1();

public:

void f_d2_2();

...

}

In this Ex, D1 is Private inheritance of class B, so NO object of D1 can call f1() or can access int a.

Similarly, no object of D2, or functions f_d2_1() or f_d2_2() can access a or f1().

In other words, in case of private inheritance, the members of base class, ACT like PRIVATE MEMBERs of derived class, for the objects or subsequent derivations of Derived class.