#include <iostream>

struct A
{
   int x;

   A()
   {
      std::cout << "Default constructor" << std::endl;
      x = 0;
   }

   A(const A& a)
   {
      std::cout << "Copy constructor" << std::endl;
      x = a.x;
   }

   A(const A&& a)
   {
      std::cout << "Move constructor" << std::endl;
      x = a.x;
   }
};

A operator+(const A& a1, const A& a2)
{
    A temp;
    temp.x = a1.x + a2.x;
    return temp;
}

int main()
{
    A a1, a2;
    A s(a1 + a2);
    return 0;
}