C++ Program using single-level inheritance

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In this program, You will learn how to implement single level inheritance in C++.

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class A { 
   //statement
}

class B : public class A {
   //statement
}

Example: How to implement single level inheritance in C++.

#include<iostream>
using namespace std;

class A {
public:
   int a;

   void input() {
       cout << "Enter a number:";
       cin>>a;
   }
};

class B : public A {
public:

   void display() {
       cout << "value of a is:" << a;
   }
};

int main() {

   B obj;
   obj.input();
   obj.display();

   return 0;
}

Output:

Enter a number:20
value of a is:20