#include <iostream>
using namespace std;
 
class A
{
    int x;
public:
    A& operator=(const A& param)
    {
        cout << "operator=\n";
        x = param.x;
        return *this;
    }
    operator int&()
    {
        cout << "operator()\n";
        return x;
    }
    A(const int& param)
    {
        x = param;
    }
    void putX()
    {
        cout << "x = " << x << endl;
    }
};
int main()
{
    A a(999);
    a = a + 33;
    a.putX();
    return 0;
}
 

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