inheritance in c++

introduction to c++

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C++ supports Inheritance , the main feature of object oriented programming through which the sub class inherits the features of its base class.

Inheritance is the (super-sub) or (parent-child) or (base-derived) class relationship.

How to achieve inheritance in c++

1 single inheritance

#include<iostream>
using namespace std; 
class A
{
 public:
 int i=10;
  void display()
  {
   cout<<"i in class A ="<<i <<endl;
  }
};

class B:A   // Here Class B inherits class A
{
public:
 int j=20;
 void show()
 {
  cout<<"i=" <<i << "j="<<j;  // i is inherited from A class.
 }
};
int main()
{
 A a1;
 a1.display();
 B b1;
 b1.show();
 return 0;
}

Above program will give the following output.

2 multilevel inheritance

#include<iostream>
using namespace std; 
class A
{
 public:
 int i=10;
};
class B:A
{
 public:
 int j=20;
};
class C:B
{
 int k=30;
 // i and j both may be used here as inheriting.
};

3 multiple inheritance

#include<iostream>
using namespace std; 
class A
{
 public:
 int i=10;
};
class B
{
 public:
 int j=20;
};
class C:(B,A)
{
 int k=30;
 // i and j both may be used here as inheriting.
};

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inheritance in c++

How to achieve inheritance in c++

1 single inheritance

2 multilevel inheritance

3 multiple inheritance

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