Multiple inheritance allows a derived class to inherit from multiple base classes. The derived class combines the members of all base classes. There are three types of inheritance access specifiers: private, public, and protected. Private inheritance makes base class members private in the derived class. Public inheritance, which is most commonly used, makes protected members protected and public members public in the derived class. Protected inheritance makes base class public and protected members protected in the derived class. An example shows a class C derived from classes A and B publicly, allowing C to access members of both base classes.

1. Multiple inheritance

2.  A PROGRAMMING TECHNIQUE THAT IS USED TO
REUSE AN EXISTING CLASS TO BUILD A NEW CLASS
IS KNOWN AS INHERITANCE.

4. Inheritance Access Specifiers
 Private Inheritance
In private mode the public and protected
members of Base class become private
members of Derived class.
class B : private A
class C : private B

5. Inheritance Access Specifiers
 Public Inheritance
This inheritance mode is used mostly. In this the
protected member of Base class becomes
protected members of Derived class and public
becomes public.
class B : public A
class C : public B

6. Inheritance Access Specifiers
Protected Inheritance
In protected mode, the public and
protected members of Base class becomes
protected members of Derived class.
class B : protected A
class C : protected B

7. TYPES OF INHERITANCE

8. Multiple inheritance
 A type of inheritance in which a derived class inherit
multiple bases classes Is known as multiple
inheritance. In multiple inheritance the derived class
combines the members of all base classes.

9. Syntax
Class child_class : spec parent_class1, spec parent class2
{
Body of the class
}

10.  Class A
 {
 body of the class
 };
 Class B
 {
 Body of the class
 };
 Class C : Public A, public B
 {
 Body of the class
 };

11. #include<iostream.h>
Using namespace std;
Class A
{
protected:
Int a;
Public:
Void in ()
{
cout<<“Enter a:”;
cin>>a;
}

12. Void out ()
cout<<“The value of a is:”<<a<<endl;
}
};
Class B
{
protected:
Int b;
Public:
Void input ()
{
cout<<“Enter b:”;
cin>>b;
}

13. Void output ()
{
cout<<“The value of b is:”<<b<<endl;
}
};
Class C : public A, Public B
{
Private:
Int c;
Public:
Void get ()
{
A::in();
B::input();
cout<<“Enter c:”;
cin>>c;
}

14. Void show ()
{
A::out();
B::output();
cout<<“The value of is c:”<<c<<endl;
}
};
int main ()
{
C obj;
obj.get();
obj.show();
return 0;
}

15. Out put
Enter a: 1
Enter b: 2
Enter c: 3
The value of a is: 1
The value of b is: 2
The value of c is: 3