RE: [Dev-C++] dynamic allocation and structs

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: Per Westermark [mailto:pw...@ia...] 
> Sent: Friday, October 25, 2002 10:53 AM
> To: Ioannis Vranos
> Cc: Dev-C++ Mailing List
> Subject: RE: [Dev-C++] dynamic allocation and structs
> 
> 
> The term vector is valid, since the allocated information is 
> only supposed
> to be used with one single index, i.e. one-dimensional.


I said avoid using the term "vector" for built-in arrays so as to not
confuse them with C++'s standard library vectors. Call them "built in
arrays".



> It must always be observed - yes this is outside scope of Dev-C++ but
> standard C/C++ requirements - that a while a pointer might 
> point to the
> forst element of a vector, i.e.
> mystruct *p;
> p[0].x = 1;
> p[1].x = 2;
> ...
> it is not required or guaranteed that there are more than one 
> element the
> pointer is pointing at. Never assume a p[1] just because p[0] is fine.
> The code below uses vector[i]->id, not vector[i][0].id, to 
> signify that
> this is a one-dimensional allocation, and that while the 
> compiler would
> accept vector[i][0], vector[i][1], vector[i][1] would point outside
> allocated memory.


i think the second [] swits better notationally. It's a personal taste.



Ioannis

* Ioannis Vranos
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