With a private modifier, why can the member in other objects be accessed directly?

Question

I have the following code:

class A 
{
private:
    int x;
public:
    A()
    {
        x = 90;
    }
    A(A a1, A a2)
    {
        a1.x = 10;
        a2.x         


        

Answer 1

A(A a1, A a2)
{
    a1.x = 10;
    a2.x = 20;
}

Now from my understanding, you question is how can a object that invoked the constructor call can access other class member variables ?

Now, both the constructor and the arguments a1,a2 are class scoped. So, it can access all it's members irrespective of it's access level. This too will also work in the constructor -

this->x = a1.x; // Notice that "this" members can be accessed too.
                // How ever both the member variables are different and are part of
                // different objects.