#include <iostream>
using namespace std;

class A
{
public:
    int x;
    A()
    {
        x = 0;
        cout << "Default constructor x = " << x << endl;
    }
    A(int a)
    {
        x = a;
        cout << "Parameterized constructor x = " << x << endl;
    }
    A(A &o)
    {
        x = o.x;
        cout << "Copy constructor x = " << x << endl;
    }
    ~A()
    {
        cout << "Destructor called" << endl;
    }
};

int main()
{
    A a1;
    A a2(5);
    A a3(a2);
    return 0;
}