#include <iostream>
 
class Counter
{
public:
    Counter();
    Counter(int initialValue);
    ~Counter(){}
    int getValue() const { return value; }
    void setValue(int x) { value = x; }
    Counter operator+(const Counter&);
  
private:
    int value;
};
  
Counter::Counter(int initialValue):
value(initialValue)
{}

Counter::Counter():
value(0)
{}

Counter Counter::operator+(const Counter &rhs)
{
    return Counter(value + rhs.getValue());
}

int main()
{
    Counter alpha(4), beta(13), gamma;
    gamma = alpha + beta;
    std::cout << "alpha: " << alpha.getValue() << "\n";
    std::cout << "beta: " << beta.getValue() << "\n";
    std::cout << "gamma: " << gamma.getValue() 
        << "\n";
    return 0;
}