what's the meaning of *&

Question

I am a java coder and not familar with the c++ language. But right now,i read the following code:

void method(A* a,A*& b);

A *a;
A *b;
method(a,b);
<         


        

Answer 1

b is a reference to a pointer of A.

So if method sets b, the b in scope of the call will be changed.