| TIP: Click on subject to list as thread! | ANSI |
| echo: | |
|---|---|
| to: | |
| from: | |
| date: | |
| subject: | Array Problem |
I snipped a bunch out of your message there. I didn't mean to
imply that arrays would always be initialized (though that's what I
did actually say), but rather that a partially initialized array
would always be completely inititialized.
RS> As for pointers, I never rely on them having _any_ particular value
RS> (NULL included!) unless I've explicitly set that value myself. Are
RS> you saying that if I have a line like char *whee[10]; that all ten
RS> pointers will be NULL pointers before a call to malloc() or some
RS> such?
DM> Nope - you didn't make ANY initialization effort. Changing it to:
DM> char *whee[10] = {NULL};
DM> will initialize ALL of them to NULL (the first because of explicit
DM> initialization, the rest because of implicit NULL initialization).
Slick. I take it this works with structs as well? Some image
routines I'm working at will probably end up using a struct that
contains the dimensions of an image, and a pointer to the image
data. I'd like to be able to set the dimensions to 0, and the
pointer to NULL, without having to explicitly initialize each
element of a struct array.
For example:
struct image
{
short xsize;
short ysize;
char _far *data;
}
struct image sprites[16] = {0,0,NULL};
This would do what I'm hoping?
RS> Hmm. I bet my compiler issues a warning.
DM> Have you tried it?
RS>
RS> Tried my compiler? Yes, I use it frequently. Tried to see if it
RS> issues a warning in this context? Not yet. I was merely surmising
DM> I was asking the latter. :-)
Heh, I know. I was just being facetious- my compiler isn't all
_that_ bad.
RS> In case you're wondering why I bother to keep using it, it's
RS> because a) it was free for me, b) I have all the manuals and
RS> original disks, and c) I'm too lazy/cheap to acquire another. :/
DM> Fair enough. :-) However, I'd also suggest getting GCC (DJGPP if
DM> you're on DOS). Before you protest about being forced to make your
DM> software freely available rather than charging (i.e., shareware), you
DM> only have to if you link in GPL'd code (as opposed to LGPL, which the
DM> standard C library is). Generally, this only applies to the stdcpp
DM> library, or to the regexp library - you are free to write even
DM> commercial software if you don't use these libraries (possibly writing
DM> clean versions yourself if you need them).
Unfortunately, I have no internet access (well, I've got an email
address, but no realtime access), so grabbing it from a web or ftp
site is out of the question, unless I do it at a friend's place.
What kind of system requirements does it have? I've got a 386/40
here with 8 megs of RAM, one 100-meg HD, and two 50-meg HDs. Only
two of the three drives can be hooked up at a time, though, and my
100-megger is chronically hovering near the full point.
... RAM = Rarely Adequate Memory
--- EzyBlueWave V1.48g0 01fd0192
* Origin: Milky Way, Langley, BC [604] 532-4367 (1:153/307)SEEN-BY: 396/1 632/0 371 633/260 262 267 270 371 634/397 635/506 728 639/252 SEEN-BY: 670/218 @PATH: 153/307 8086 800 140/1 396/1 633/260 635/506 728 633/267 |
|
| SOURCE: echomail via fidonet.ozzmosis.com | |
Email questions or comments to sysop@ipingthereforeiam.com
All parts of this website painstakingly hand-crafted in the U.S.A.!
IPTIA BBS/MUD/Terminal/Game Server List, © 2025 IPTIA Consulting™.