Close all open stream files
#include <stdio.h> int fcloseall( void );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The fcloseall() function closes all open streams, including stdin, stdout, and stderr. This includes streams created (and not yet closed) by fdopen(), fopen(), and freopen().
If an error occurs, errno is set.
fclose(), fdopen(), fopen(), freopen()