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

fflush

raw OCR

Hushes a stream.

Defined in header <stdio.h>

Syntax

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

Portability

DOSUNIXWindowsANSI CC++ only
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Remarks

If the given stream has buffered output, fflush writes the output for stream to the associated file.

The stream remains open after fflush has executed, fflush has no effect on an unbuffered stream.

Return value

fflush returns 0 on success. It returns EOF if any errors were detected.

See also

Example

include  <string.h>
#include <stdio.h>
#include <conio.h>
#include <io.h>

void flush (FILE *stream);

int main (void)
{
   FILE *stream;
   char msg[] =  "This is a test";
   /* create a file  */
   stream = fopen ("DUMMY.FIL", "w");
   /* write some data to the  file */
   fwrite(msg, strlen(msg),  1, stream);
   clrscr 0;
   printf ("Press any key to flush DUMMY.FIL:");
   getchO ;
   /* flush the data to DUMMY.FIL without  closing it */
   flush (stream);
   printf ("\nFile was flushed, Press any key to quit:");
   getchO ;
   return 0;
}
void flush (FILE *stream) {
   int duphandle;

   /* flush the stream's internal buffer  */
   fflush (stream);
   /* make a duplicate file handle  */
   duphandle = dup (fileno(stream));
/* close the duplicate handle to  flush the DOS buffer */
close(duphandle);

Differences from modern implementations

Nothing recorded yet.

Modern references

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