#include <iostream>
 
using namespace std;
class A 
{
public:
    int x;
    A(){}
};
 
class B 
{
public:
    int x;
    B()=default;
};
 
 
int main() 
{ 
    int x = 5;
    new(&x)A(); // Call for empty constructor, which does nothing
    cout << x << endl;
    x = 5;
    new(&x)B; // Call for default constructor
    cout << x << endl;
    x = 5;
    new(&x)B(); // Call for default constructor + Value initialization
    cout << x << endl;
    return 0; 
} 

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