Reverse a number & hello world class in c++

C++ hello world class program

#include

#include

 class Message

{

  public:

    void display()

 {

      cout << "Hello World\n";

    }

};

int main()

{

            Message c;   

            c.display();   

            return 0;

}

C++ addition program using class

#include 

#include 

class Mathematics

 {

  int x, y;

public:

  void input()

 {

    cout << "Input two inetegers\n";

    cin >> x >> y;

  }

  void add() 

{

    cout << "Result = " << x + y;

  }

};

int main()

{

   Mathematics m; 

   m.input();

   m.add();

   return 0;

}

C++ program to reverse a number

#include 

#include 

class Operations

{

  long c;

public:

  void inputNumber()

  {

    cout << "Input a number\n";

    cin >> c;

  }

  long reverseNumber()

  {

    long invert = 0;

    while (c != 0)

    {

      invert = invert * 10;

      invert = invert + c%10;

      c = c/10;

    }

    return invert;

  }

};

int main()

{

  long result;

  Operations t;

  t.inputNumber();

  result = t.reverseNumber();

  cout << "Number obtained on reversal = " << result;

  return 0;

}