🚀 go-pugleaf

In article <4j06lv$7ve@solutions.solon.com>,
   cn3780@coastalnet.com (Terry Heath) wrote:
>I have seen many references in text  I have read about multiple
>indirection (i.e. **p); I seen how to initilize them and so on.  The
>question is:
>
>  Why would it be necessary to use such a pointer, and when?

Multiple indirection is usually needed when you are changing a pointer from 
within a function.  For example, if you were to open a FILE from inside a 
function, you would need pass to it a double-pointer, so that the changes can 
escape.  Also, if you are dealing with a linked list, and you are calling a 
function that may change what the head of the list is, then you are also going 
to have to pass a double pointer.

Another reason for using multiple indirection is when you are dynamically 
allocating your own multi-dimentional array.