Pointer points to another pointer in structure

Question

I have structure named temp with member n:

struct temp
{
    int n;
}

I wish to declare a pointer p to access member n.

struct temp *p

How to access member n by another pointer p1 which points to pointer p.

Answer 1

You can access member n through a pointer to p with

temp a;
temp *p = &a;
temp **p1 = &p;
(*p1)->n = 2;

p1 is a pointer to p. Dereferencing it gives a reference to p. (*p1) and p are equivalent.