Write a C++ program to demonstrate hierarchical inheritance to get square and cube of a number.

Sure, here is a simple C++ program that demonstrates hierarchical inheritance to get the square and cube of a number.

#include<iostream>
using namespace std;

// Base class
class Number {
   protected:
      int num;
   public:
      void getNumber(int n) {
         num = n;
      }
};

// First derived class
class Square : public Number {
   public:
      int getSquare() {
         return num * num;
      }
};

// Second derived class
class Cube : public Number {
   public:
      int getCube() {
         return num * num * num;
      }
};

int main() {
   Square sq;
   Cube cu;
   int number;

   cout << "Enter a number: ";
   cin >> number;

   sq.getNumber(number);
   cu.getNumber(number);

   cout << "Square of " << number << " is: " << sq.getSquare() << endl;
   cout << "Cube of " << number << " is: " << cu.getCube() << endl;

   return 0;
}

In this program, Number is the base class and Square and Cube are the derived classes. The base class has a member variable num and a function getNumber() to get the number from the user. The derived classes Square and Cube inherit the properties of the base class and have their own functions getSquare() and getCube() to calculate the square and cube of the number respectively.