dev-cpp-users Mailing List for Dev-C++

If I want to add staand alone images on a form (not part of a toolbar or
something), is there some control specific for that or I have to use GDI
only?





Regards,

Ioannis Vranos
 
* Programming pages: http://www.noicys.freeurl.com
* Alternative URL 1: http://run.to/noicys
* Alternative URL 2: http://www.noicys.cjb.net

Hi!

For Dev-C++ 4.9.8.0 I downloaded the SDL package, which works well with
the functions (I can initialize the video susbsystem for ex.), but when I
want to use a type, like Uint16, the compiler doesn't understand it. SDL.h
is included.

	Thanks,

		Laszlo

you dont need to swap the both matrices,
you can easily switch from one matrix to the other
with a pointer, as follows:

**************************************
int matrix1 [ N ] [ M ];
int matrix2[N][M];

int *q = matrix1[0];
matrix1[1][0]=8;
cout << matrix1[1][0] << *(q+3);

q = matrix2[0];
matrix2[1][0]=9;
cout << matrix2[1][0] << *(q+3);
********************************

It seems that you can find an alternative solution,

for instance in your case:

***************************
#define N 2
#define M 3

int main()
{
  int matrix [ N ] [ M ];
  int *q = matrix[0];

  matrix[1][0]=8;
  cout << matrix[1][0] << *(q+3);

      system("PAUSE");
      return 0;
}
**************************

Hi everyone,

I've just reached the part about error handling and I'm afraid it had me
thoroughly confuzzled!

Here's a simple bit of code which, at the very end, requires a float
input. How can I catch mistakes made by entering the wrong type of data,
e.g. character where it should be numeric or visa versa?

====================================================
		cin.ignore (1);
		cout << "\nName of Dish:  ";
		getline (cin,sName);
		cout << "Description:  ";	 
		getline (cin,sDescription);
		cout << "Price?  ";
		cin >> fPrice;
====================================================

		
Any help would be immensely appreciated. I seem to learn better by
simple examples.

Cheers,
D.


--
This mail is a natural product.  The slight variations in 
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> -----Original Message-----
> From: dev...@li...=20
> [mailto:dev...@li...] On Behalf=20
> Of David McKen
> Sent: Thursday, May 01, 2003 10:09 PM
> To: dev...@li...
> Subject: Re: [Dev-C++] 'extern const' and std::vector
>=20
>=20
> The rooms are not nesesarily accessed in sequential order.
> One very used
> command (at least by admins) is the goto command. Syntax:
> goto <vnum or
> player>. This can cause an admin in room #300 to need
> access to room #50000.
> Also ceartain other command allow ordinary players to make
> different jumps
> to rooms that are not in sequential order.
>=20
> The assiging of rooms to the admins in charge of building
> makes it very
> likely that the rooms adjacent to the current room are
> going to be within
> that range (+ or -100) therefore with some exceptions
> (which are not that
> rare) moving from one room to another involves moving up or
> down a few
> vnums.


As Per Westermark said a map seems to be more suitable than vector since =
you
are going to add things in the middle and you want random access. Or a
multimap I would say if every room is beside in more than one rooms.




>=20
> Hmm, I understand about the making the global variable a
> class and actually
> that was my other question. (I guarantee you if it dosen't
> have to e global
> I don't want it to be global, that only increases the
> number of validity
> checks I have to make, eww)
>=20
> Each client is going to be in their own thread. For the
> reading functions
> this should prove no problem (two threads reading the same
> variable doesn't
> cause any problems? Right?) The writing functions (only
> avalible to admins)
> are what will require locking down (Mutex, Critical
> Section, etc.).



Yes you need a locking mechanism (although I do not know much about =
threads
yet).


=20
> One of my original thoughts was to create a vector of
> pointers to each room
> structure. Thereby allowing random room access and also
> allowing the
> numbering system to remain intact.
>=20
> if the vector currently only has rooms 1-100 filled in and
> an admin request
> to goto room #150 to start creating a new area then the
> rooms in between 100
> and 150 will be NULL pointers that can be checked for,


Or in the case of a map only the existing rooms will exist and when
accessing a non-existent room, 0 is returned (if suitable for the type,
which is suitable for pointers).



> if
> an admin request a
> room the does not exist then a template room is created for
> the admin to
> edit to their liking. This has the obvious disadvantage in
> that if an admin
> request room #999999 and the vector only has the rooms up
> to #1000 there
> will be alot of NULL pointers wasting memory.=20



Yes, so map is perfect, it will not create 0-value pointers (NULL is =
better
for C, 0 is better for C++ regarding pointers).



>Given the way
> that these
> numbers are assigned this should not be a problem (with the
> exception of the
> top admins who can load and save any area) most admins are
> forced to remain
> within their assigned range.
>=20
> Any thoughts on this will be appreciated.


As Per said: use map (or multimap if it fits you better).




> BTW we have a project on sourceforge 'SinstradMUD'.
> The current codebase is in the cvs repository in the /src
> directory.
> The (extremly alpha, still deciding what library to use)
> code for the new
> codebase is in the Sinstrad2 directory


For what OS is it going to be?




Ioannis Vranos
=20
* Programming pages: http://www.noicys.freeurl.com
* Alternative URL 1: http://run.to/noicys
* Alternative URL 2: http://www.noicys.cjb.net