Example of Data Abstraction

Any C++ program where you implement a class with public and private members is an example of data abstraction. Consider the following example:

#include <iostream>

#include<conio.h>

using namespace std;

class Add{

   public:

      // constructor

      Add(int i = 0)

      {

        total = i;

      }

      // interface to outside world

      void addNum(int number)

      {

          total += number;

      }

      // interface to outside world

      int getTotal()

      {

          return total;

      };

   private:

      // hidden data from outside world

      int total;

};

int main( )

{

   Add a;

  

   a.addNum(10);

   a.addNum(20);

   a.addNum(30);

   cout << "Total " << a.getTotal() <<endl;

   return 0;

}