#include <iostream>
      
      class Counter
      {
         public:
            Counter();
            Counter(int initialValue);
            ~Counter(){ }
            int GetItsVal()const {return itsVal; }
            void SetItsVal(int x) {itsVal = x; }
            Counter Add(const Counter &);
      
         private:
            int itsVal;
      
       };
      
       Counter::Counter(int initialValue):
       itsVal(initialValue)
       { }
      
       Counter::Counter();
       itsVal(0)
       { }
      
       Counter Counter::Add(const Counter & rhs)
       {
          return Counter(itsVal+ rhs.GetItsVal());
       }
      
       int main()
       {
          Counter varOne(2), varTwo(4), varThree;
          varThree = varOne.Add(varTwo);
          std::cout << "var0ne: " << varOne.GetItsVal()<< std::endl;
          std::cout << "varTwo: " << varTwo.GetItsVal() << std::endl;
          std::cout << "varThree: " << varThree.GetItsVal() << std::endl;
      
          return 0;
       }