[fpc-pascal] Pointers

[David Emerson]

On Thu 11 Feb 2010, Rainer Stratmann wrote:
> How can I have access to position 4 of a pointer?
> 
> var
>  p : pbyte;
>  c : char;
>  s : ansistring;
>  x : longint;
> 
>  s := 'Hello';
>  p := @s;
>  x := 4;  // 4th position
>  c :=  [p+x]^ ??? how to get access to the 'o'

c := (p+x)^;  // why would someone use square brackets for that?

Of course, if you are actually working with a string, there is no need 
to use pointers.
c := s[5]; // remember strings are 1-indexed

You can also increment...
inc (p, 4);
c := p^;

I might make a second pointer, q, and increment that, so p can stay in 
place.

~David.