Constructing a child object from parent object in C++ - rvalue-reference

Question

I am trying to construct a child class object from a base class object. I have tried the below code.
class A
{
public:
A();
A(A&& objectName) = default;
virtual void setint(int i);
virtual void getint();
int var;
};
class B: public A
{
public:
virtual void getint();
B(A&& objectName);
int j= 20;
};
A::A()
{
}
void A::setint(int i)
{
var = i;
}
void A::getint()
{
qDebug()<<"From A Var"<<var;
}
void B::getint()
{
qDebug()<<"From B j"<<j;
qDebug()<<"From B Var"<<var;
}
B::B(A&& objectName): A(std::move(objectName))
{
}
And in my Main.cpp I am doing this
#include <memory>
int main(int argc, char *argv[])
{
A *obj = new A();
obj->setint(10);
obj->getint();
A *obj1 = new B(std::move(*obj));
obj->getint();
obj1->getint();
return 0;
}
The result I get is
From A Var 10
From A Var 10
From B j 20
From B Var 10
My question is why am I getting the value of Var after A *obj1 = new B(std::move(*obj)); this line. I thought the object pointed by obj must have been destructed.

Answer 1

Let me copy paste from this answer: https://stackoverflow.com/a/15663912/512225
std::move doesn't move from the object. It just returns an rvalue reference whose referand is the object, making it possible to move from the object.
Anyway your code is terrible. I hope you know. If you don't, ask for a review.