[Freeciv-Dev] Re: (offtopic) C subscripts; was Re: Compiler-warnings

["SamBC" <sambc@xxxxxxxxxxxxxxxxxxx>]

Pontless message:

----- Original Message -----
From: "Gaute B Strokkenes" <gs234@xxxxxxxxxxxxxxxx>

>
> Incidentally, this means that [] is abelian:
>

This is the first time I have seen the new words I learnt on my first
year maths (degree) course used anywhere else. Makes me feel special to
understand it...

> int
> main (int argc, char *argv[])
> {
>   printf("The third letter of the alphabet is %c.\n", 2["ABC"]);
> }

Not sure if you're right though... I think some people are going odd on
the thing about pointer arithmetic/subscripts... given that an array
name and a pointer are the same thing, you get the same results,
excepting location in memory, with (excuse C++ code, point is the same
in C)

char* p = new char[50];
//initialise array
cout << p[20];
cout << *(p+20);

as you do with

char p[50];
//initialise array
cout << p[20];
cout << *(p+20);

and both should give unexpected results (or possibly errors) with

cout << p[-1];

as with

cout << *(p-1);

as well as with

cout << p[51];

and

cout << *(p+51);

Sory if someone else said this, or if I misunderstood... I'm a little
behind, a little out of practise, and a little tired...


SamBC