C++ In a Nutshell

Name

setvbuf function — Sets file buffer

Synopsis

int setvbuf(FILE* stream, char* buf, int mode, size_t size)

The setvbuf function sets the buffering for stream. The mode determines the buffering mode: no buffering (_IONBF), line buffering (_IOLBF), or full buffering (_IOFBF). You can supply a buffer in the buf argument, with size as the buffer size, or use a null pointer for the buf argument to let setvbuf allocate the buffer. (The buffer will be freed when the file is closed or setvbuf is called to change the buffering.)

Call setvbuf before performing any I/O on stream.

See Also

IOFBF macro, _IOLBF macro, _IONBF macro, setbuf function