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Clear a stream's end-of-file and error flags
#include <stdio.h>
void clearerr( FILE *fp );
- fp
- The stream for which you want to clear the flags.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The clearerr() function clears the end-of-file and error flags
for the stream specified by fp.
These indicators are also cleared when the file is opened, or by an
explicit call to clearerr() or
rewind().
#include <stdio.h>
#include <stdlib.h>
int main( void )
{
FILE *fp;
int c;
c = 'J';
fp = fopen( "file", "w" );
if( fp != NULL ) {
fputc( c, fp );
if( ferror( fp ) ) { /* if error */
clearerr( fp ); /* clear the error */
fputc( c, fp ); /* and retry it */
}
}
fclose( fp );
return EXIT_SUCCESS;
}
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
feof(),
ferror(),
fopen(),
perror(),
rewind()
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