Tests for end-of-file on a stream.
#include <stdio.h>
int feof( FILE *stream );
| stream | Pointer to FILE structure |
The feof routine (implemented both as a function and as a macro) determines whether the end of stream has been reached. Once the end of the file is reached, read operations return an end-of-file indicator until the stream is closed or until rewind, fsetpos, fseek, or clearerr is called against it.
The feof function returns a nonzero value after the first read operation that attempts to read past the end of the file. It returns 0 if the current position is not end-of-file. There is no error return.
Standards:ANSI, UNIX
16-Bit:DOS, QWIN, WIN, WIN DLL
32-Bit:DOS32X
clearerr, _eof, ferror, perror
/* FEOF.C: This program uses feof to indicate when it reaches the end
* of the file FEOF.C. It also checks for errors with ferror.
*/
#include <stdio.h>
#include <stdlib.h>
void main( void )
{
int count, total = 0;
char buffer[100];
FILE *stream;
if( (stream = fopen( "feof.c", "r" )) == NULL )
exit( 1 );
/* Cycle until end of file reached: */
while( !feof( stream ) )
{
/* Attempt to read in 10 bytes: */
count = fread( buffer, sizeof( char ), 100, stream );
if( ferror( stream ) )
{
perror( "Read error" );
break;
}
/* Total up actual bytes read */
total += count;
}
printf( "Number of bytes read = %d\n", total );
fclose( stream );
}
Number of bytes read = 697