Re: beginnersprobleem C onder Linux

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#4891

From: KLinZ
Date: Sun, 29 Jun 2003 10:39

31 lines
2090 bytes

KLinZ wrote:

Even een volledige recode:

#include <stdio.h>

int main () {
 FILE *fp_bgl;      /* file pointer to file being read   */
 int rd_cnt;        /* will tell how many *items* were actually read */
 char header[128];  /* first 128 bytes in header */

 fp_bgl=fopen("de_naam_van_mijn_bestand", "r");
 if(fp_bgl!=NULL) {
  printf ("file opened with FP_BGL= %p\n", fp_bgl);     /* op zich weinig
nuttige info */
  rd_cnt=fread(header, sizeof(header), 1, fp_bgl);
  printf ("Header has read %3d items\n", rd_cnt);
  fclose(fp_bgl);
 } else {
  printf ("bestand kon niet geopend worden\n");
 }

 return 0;
}

Merk op dat fread niet het aantal gelezen bytes teruggeeft, maar het aantal
succesvol gelezen 'items'. Je kunt die waarde dus gebruiken om te
controleren of het lezen gelukt is.

-- 
www.zenobits.com

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