multilevel Inheritance in C++

3.)  Multilevel - Inheritance

*In this type of inheritance, a derived class is created from another derived class.

     *If a class is derived from another derived class then it is called multilevel inheritance. So in C++ multilevel inheritance, a class has more than one parent class.

For example, if we take animals as a base class then mammals are the derived class which has features of animals and then humans are the also derived class that is derived from sub-class mammals which inherit all the features of mammals.


*A diagram that demonstrates multilevel inheritance is given below

// cpp program on multilevel inheritance.


#include<iostream>

using namespace std;

class student

{

 protected:

  int roll_number;

 public:

  void getnumber(int a)

  {

   roll_number=a;

  }

  void putnumber()

  {

   cout<<"roll number:"<<roll_number<<"\n";

  }

};

class test :public student

{

 protected:

  float sub1,sub2;

  public:

   void getmarks(float x,float y)

   {

    sub1=x;

    sub2=y;

   }

   void putmarks();

};

void test ::putmarks()

{

 cout<<"marks in sub1="<<sub1<<"\n";

 cout<<"marks in sub2="<<sub2<<"\n";

}

class result :public test

{

 float total;

 public:

    void display()

      {

   

        total=sub1+sub2;

           putnumber();

           putmarks();

            cout<<"total="<<total<<"\n";

}

};

int main()

{

 result r;

 r.getnumber(1);

 r.getmarks(55,77);

 r.display();

 return 0;

}

input/output:-

roll number:1

marks in sub1=55

marks in sub2=77

total=132