Resets the error indicator for a stream.
#include <stdio.h>
void clearerr( FILE *stream );
stream | Pointer to FILE structure |
The clearerr function resets the error indicator and end-of-file indicator for stream. Error indicators are not automatically cleared; once the error indicator for a specified stream is set, operations on that stream continue to return an error value until clearerr, fseek, fsetpos, or rewind is called.
None.
Standards:ANSI, UNIX
16-Bit:DOS, QWIN, WIN, WIN DLL
32-Bit:DOS32X
/* CLEARERR.C: This program creates an error on the standard input
* stream, then clears it so that future reads won't fail.
*/
#include <stdio.h>
void main( void )
{
int c;
/* Create an error by writing to standard input. */
putc( 'c', stdin );
if( ferror( stdin ) )
{
perror( "Write error" );
clearerr( stdin );
}
/* See if read causes an error. */
printf( "Will input cause an error? " );
c = getc( stdin );
if( ferror( stdin ) )
{
perror( "Read error" );
clearerr( stdin );
}
}
Write error: Error 0
Will input cause an error? n