Re: File als return type in C

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#9225

From: Staf Wagemakers
Date: Thu, 09 May 2002 17:01

46 lines
1996 bytes

In article <MPG.1744bcd5e0532dba989683@news.pandora.be>, Ulyssess wrote:
> In article <i5wC8.3290$Lz7.659851358@hebe.telenet-ops.be>, 
> jossthebossnospam@fastmail.fm says...
>> 
>> dbOpen geeft een FILE, geen FILE*. Dus dat kan niet werken.
>> 
>> Dus: *dbfile = dbOpen(filename);
>> 
> 
> Nope, werkt niet.

Zou toch moeten werken...

Het volgende voorbeeldje leest /etc/passwd en toon het op je scherm:

#include <stdio.h>
FILE * dbOpen(char *filename) {
FILE *dbfile;
if ((dbfile = fopen(filename,"r")) == NULL) return NULL;
return dbfile;
}
int main ()
{
FILE *fp;
char filename[]="/etc/passwd";
char buf[256];

fp=dbOpen(filename);
if(fp==NULL) {
  fprintf(stderr,"Unable to open %s\n",filename);
  exit(1);
}
while (fgets(buf,255,fp)) {
  printf("%s",buf);
}
fclose(fp);
exit(0);
}

Hopelijk help dit een beetje...

-- 
Staf Wagemakers

email      : staf.wagemakers@advalvas.be
homepage   : http://stafwag.netfirms.com

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From: Staf Wagemakers <stafwag@yahoo.com>
Subject: Re: File als return type in C
References: <MPG.1744a6babc84ee11989682@news.pandora.be> <i5wC8.3290$Lz7.659851358@hebe.telenet-ops.be> <MPG.1744bcd5e0532dba989683@news.pandora.be>
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