multi level Inheritance in C++.

programs of multi level Inheritance:

// multi level inheritence 
#include<iostream>
using namespace std;

class A{
 int a;
 public:
 
 void set_a(int a1){
  a=a1;
 } 
 int get_a(){
  return a;
 }
};
class B:public A{
 int b;
 public:
 
 void set_b(int b1){
  b=b1;
 }
 int get_b(){
  return b;
 }
};
class C: public B{
 int c;
 public:
 
 int multi(){
  c=get_a()*get_b();
  return c;
 } 
};

int main(){
 C obj;  // object of class C
 obj.set_a(10);
 obj.set_b(6);
 cout<<"multiply of a*b = "<<obj.multi();
}

out put:

 multiply of a*b = 60

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