Code:
#include <iostream>

using namespace std;

class broj
{
      private:
              int a;
              int b;
      public:
              broj (int aa, int bb)
              {
                      a = aa; b = bb;
              }
              
              //-----------------Prefiksni oblik--------------------------------
              
              broj& operator++ ()
              {
                  ++a;
                  ++b;
                  return *this;
              }
              friend broj& operator-- (broj& b)
              {
                  --b.a;
                  --b.b;
                  return b;
              }
              
              //-----------------Postfiksni oblik-------------------------------
              
              broj operator--(int f)
              {
                  broj a = *this;
                  a--;
                  b--;
                  return a;
              }
              friend broj operator++(broj& b, int f)
              {
                  broj a = b;
                  b.a++;
                  b.b++;
                  return a;
              }
              
              //----------------------------------------------------------------
              
              friend ostream& operator<< (ostream& dat, const broj& b)
              {
                     dat << '(' << b.a << ',' << b.b << ')' << endl;
              }
};

main()
{
      broj a(2,2);
      cout << a-- << a;
      system("pause");
}