Borland C++ reference
Borland C++ 3.1 › <stdio.h>

ferror

raw OCR

Detects errors on stream.

Defined in header <stdio.h>

Syntax

#include <stdio.h>
int ferror(FILE *stream);

Portability

DOSUNIXWindowsANSI CC++ only
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Remarks

terror is a macro that tests the given stream for a read or write error. If the stream's error indicator has been set, it remains set until clearerr or rewind is called, or until the stream is closed.

Return value

terror returns nonzero if an error was detected on the named stream.

See also

Example

#include <stdio.h>

int main(void)
{
   FILE *stream;
   /* open a file for writing */
   stream = fopen("DUMMY.FIL", "w");
   /* force an error condition by attempting to read */
   (void) getc(stream);
   if (ferror(stream)) {    /* test for error on the stream  */
      /* display an error message */
      printf("Error reading from DUMMY.FIL\n") ;

      /* reset the error and EOF indicators */
      clearerr(stream);
   }
   fclose(stream);
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

These are search links, not yet checked by hand.

Extraction notes

  • heading `terror` read as `ferror`

Stable link: /3.1/stdio.h/ferror/ · short form /3.1/ferror/