Wie kann ich ein Element eines Struktur- Arrays über Zeiger ansprechen?

Hi,
if you don't mind, please repost your question in english, as most experts will communicate in English, least of them know german...

thanks,
angelIII, zone advisor

05.16.2008 at 02:10PM PDT, ID: 21586469

Rank: Master

Your program will always fail because of this line:

>> if (fz_artDat = NULL)

You are using the assigment operator here (=) rather than the equality operator (==). What's happening is that it's assigning NULL to fz_artDat and then the if statement fails, because NULL evaluates to a false statement. Then it goes to the else and continues on, probably ending up with a crash. Change that line to this:

if (fz_artDat == NULL)

and you should end up with the functionality you want. I haven't checked anything else, so there could be other problems with the code.

Accepted Solution

05.16.2008 at 02:11PM PDT, ID: 21586476

Rank: Genius

Infinity08:

>> und erstellt einen Fehlerbericht.

What error message ?

05.16.2008 at 02:12PM PDT, ID: 21586483

Rank: Genius

Your problem is as simple as nasty. In

FILE *fz_artDat = fopen("MP-CH-118_art_name-vorname.txt.", "w");
if (fz_artDat = NULL) // <----------------- here!
{
printf("\n Fehler! Datei wurde nicht angelegt!");
break;
}

you are *assigning* a NULL value to 'fz_artDat' instead of checking if it is NULL, that should be

FILE *fz_artDat = fopen("MP-CH-118_art_name-vorname.txt.", "w");
if (fz_artDat == NULL) // <----------------- double '==' to check
{
printf("\n Fehler! Datei wurde nicht angelegt!");
break;
}

That causes the 1st call to 'fputs()' zo blow up.

angelIII,

>>least of them know german...

Da waere ich mir nicht so sicher ;o)

Assisted Solution

05.16.2008 at 02:32PM PDT, ID: 21586615

Rank: Master

>> >>least of them know german...
>>
>> Da waere ich mir nicht so sicher ;o)

Those of us who don't know it can translate: Yahoo! Babel Fish says.. "There I would not be so safe me." Makes perfect sense! ;)

05.16.2008 at 02:35PM PDT, ID: 21586636

Rank: Genius

Well, the correct translation is "I wouldn't bet on that" (or literally "I wouldn't be too sure about that"). ;o)

05.16.2008 at 02:38PM PDT, ID: 21586654

LordOfPorts:

Der Datai Name hat auch einen Punkt nach der "extension" .txt. in der folgenden Zeile:

FILE *fz_artDat = fopen("MP-CH-118_art_name-vorname.txt.", "w");

Der Punkt sollte wahrscheinlich entfernt werden:

FILE *fz_artDat = fopen("MP-CH-118_art_name-vorname.txt", "w");

Assisted Solution

05.16.2008 at 03:32PM PDT, ID: 21586964

Rank: Genius

Also, es würde mich schon extrem wundern, wenn der Punkt der Grund für den Absturz war.

I'd be extremely surprised if the trailing dot was the reason for the crash...

05.17.2008 at 11:56AM PDT, ID: 21590411

LordOfPorts:

Danke für die Lösungspunkte aber SeanDurkin war der erste der das Problem mit =NULL bemerkt hat, die meisten Lösungspunkte sollten zu ihm gehen.

Thank you for the awarded points but SeanDurkin was the first to notice the issue with the =NULL, he deserves the majority of the points.

angelIII, would you please adjust the points in favor of SeanDurkin, hrw-sgch has confirmed in the points award comment that the biggest issue was =NULL instead of ==NULL and I am sure that the points were not awarded all to me intentionally; I would appreciate just a few points be left for me too regarding the dot issue. Thank you very much for your consideration and help!

05.17.2008 at 12:00PM PDT, ID: 21590421

hrw-sgch:
are you ok to reopen the question and redistribute the points?
angelIII, zone advisor

05.17.2008 at 01:19PM PDT, ID: 21590628

bzw auf Deutsch:
hrw-sgch, würden Sie bitte erläutern, ob die Entscheidung, nur den einen Beitrag als Lösung zu wählen, bewusst so getroffen wurde, oder nur einer der Beiträge, im Unwissen dass hier bei Experts-Exchange mehrere Beiträge als Lösung ausgewählt werden können.
angelIII, zone advisor

05.17.2008 at 01:54PM PDT, ID: 21590725

Rank: Master

thanks, LordOfPorts :)

jeez, does everyone around here know german? :P

05.17.2008 at 04:13PM PDT, ID: 21591061

Rank: Genius

>>jeez, does everyone around here know german? :P

C'est une surprise pour vous? ;o)

05.17.2008 at 07:19PM PDT, ID: 21591375

Rank: Master

french, too?! :o

05.17.2008 at 08:00PM PDT, ID: 21591476

Rank: Genius

J'ai oublié la grande partie de mon Francais par les derniers vingt ans ;o)

Haven't you read the prerequisites carefully enough when signing up to EE? *eg*

05.18.2008 at 01:37AM PDT, ID: 21591963

Et un autre qui connais le francais ... aaaaaah....

05.18.2008 at 07:25PM PDT, ID: 21594911

Rank: Genius

Malheuresment, jusque un petit peu manintenant :-(

05.19.2008 at 05:23PM PDT, ID: 21602611

modus_operandi:

hrw-sgch,

jkr has asked (http://www.experts-exchange.com/Q_23410754.html) for an explanation of why you selected the
answer(s) you selected for this question.

Please indicate your reasoning within the next four days. I or another Moderator will check
back in about four days, at which time we expect to see your explanation.

To other participating Experts: please leave your recommendations as well.

After reviewing the explanation and other recommendations, the Moderator may decide to
change the award for the question.

Thank you,

modus_operandi
EE Moderator

05.24.2008 at 04:23AM PDT, ID: 21638652

Vee_Mod:

No response from Asker - question re-opened.

angelIII,
Would you please review all of the comments and let us know how this question should be closed.

hrw-sgch,
Welcome to EE.
All of the volunteers here are willing to help you, but you need to respond when make a request.

All comments from everyone involved are invited below.

Vee_Mod
Experts Exchange Moderator

05.24.2008 at 04:38AM PDT, ID: 21638697