crarerw

class Z
{
  public:
    Z(){}
    Z(int i)	 { data = i;          }
    void print() { std::cout << data; }
    Z operator+ (Z& b);
  private:	
    int data;	
};

Z Z::operator + (Z& b)
{
  Z result;
  result.data = data + b.data;
  return result;
}

int main()
{
  Z a = 5;
  Z b = a + a + a;
  b.print();
}