2D array of structures

[svata]

Hello,

I wonder how to resize such array of structures using realloc()?

#include <stdio.h>
#include <stdlib.h>
#define FIRST 7

typedef struct {
char *name;
int i;
int j;
} STRUCTURE;

STRUCTURE **p_structure;

int main() {

p_structure = (STRUCTURE **) malloc(FIRST * sizeof(STRUCTUR E));
if ( p_structure == NULL ) {
printf("Failed to allocate memory, exiting...");
return 1;
}
}

Thank you in advance

Svata

[CBFalconer]

svata wrote:

Richard Heathfield wrote:

.... snip ...

>

>2) avoid scanf until you're an expert; if your teacher requires
its use, plague him mercilessly with questions about it until it
becomes apparent that he doesn't understand it either;

Can you explain me why should I refrain from using scanf()? Is that
function cursed or what? I see real difference in using gets() of
fgets(). But Borland C compiler gives no warning about using gets...

In reverse order, no warning is required for gets avoidance, just
common sense, because it cannot be used safely. You can use my
ggets instead (see url below).

Yes, scanf is cursed, especially for interactive use. The only
sane way to use it is for one item at a time, carefully checking
its return value. Unless your name is Dan Pop.

--
Chuck F (cbfalconer at maineline dot net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home .att.net>

[Norbert Kolvenbach]

Richard Heathfield wrote:

svata said:

<snip>

>Can you explain me why should I refrain from using scanf()? Is that
function cursed or what?

No, but it's very easy to misuse it. Most teachers teach it badly. Yours
does, for example.

Very much agreed. So why not write a book about it (or at least a chapter)?
Your writing is good reading.

Long time ago I used (f)scanf extensively and it's appropriate if you know
what you do.
NoKo
--
"1 + 1 = 3, for suitable large 1"

[Richard Heathfield]

Norbert Kolvenbach said:

Richard Heathfield wrote:

>No, but it's very easy to misuse [scanf]. Most teachers teach it badly.

[...]

>
Very much agreed. So why not write a book about it (or at least a
chapter)?

Oh, please don't ask me to do that! :-)

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999
http://www.cpax.org.uk
email: normal service will be restored as soon as possible. Please do not
adjust your email clients.

[svata]

Richard Heathfield wrote:

Oh, please don't ask me to do that! :-)

But then novices like me will ask same questions again and again. I
admit, scanf is a bit tricky and can cause headache if used improperly.

svata

[Richard Heathfield]

svata said:

Richard Heathfield wrote:

>Oh, please don't ask me to do that! :-)

But then novices like me will ask same questions again and again.

Point taken. Added to my "to-do" list. Near the bottom somewhere, though.

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999
http://www.cpax.org.uk
email: normal service will be restored as soon as possible. Please do not
adjust your email clients.