#include <iostream>
using namespace std;

class Displacement {
   private:
      int meters;  
   public:
      // required constructors

      Displacement() 
      {
         meters = 0;
      }

      Displacement(int m)
      {
         meters=m;
      }  

      // overload function call

      Displacement operator()(int a, int b, int c) 
       {
         Displacement D;
         D.meters = a+b+c;
         return D;
       } 

      // it show the displacement
      void show_displacement() 
        {
          cout  << meters << " Meters " << endl;
        }  
};

int main() {
   Displacement D1(100), D2;
   cout << "D1 Displacement : ";
   D1.show_displacement();
   D2 = D1(200, 200, 200); // invoke operator() overloading method
   cout << "D2 Displacement:";
   D2.show_displacement();
   return 0;
}

Conclusion

• Data Abstraction in C++
• C++ Variable Types
• Python vs C++
• C++ Data Types
• Comments in C++
• C++ Basic Syntax
• What is C++ Programming?
• C++ Environment Setup
• Object Oriented Programming
• C++ Tutorial: What is C++?