Author: Stan Eisenstat
Subject: Re: [Cs223] Question about typedef
Date: Saturday, 14 Mar 2020, 07:13:50

    > Message Posted By: Unknown
    >
    > I have a question about an example in Professor Aspnes' notes (page 210).
    >
    > If you have the following two lines:
    >     typedef struct elt *Stack;
    >     Stack *s;
    >
    > Is 's' a pointer to a pointer to a elt struct or is it simply a pointer to
    > a elt struct?

The declaration

  typedef struct elt *Stack;

says that a variable of type Stack is a pointer to a
struct elt.  Similarly, The declaration

  Stack *s;

says that the type of *s is Stack.  Thus *s is a pointer
to a struct elt, so that s itself is a pointer to a
pointer to a struct elt.

--Stan-