int_type sputc( char_type ch );
Writes one character to the output sequence.
If the output sequence write position is not available (the buffer is full), then calls overflow(ch).
|ch||-||character to write|
 Return value
The written character, converted to
int_type with Traits::to_int_type(ch). on success.
Traits::eof() (as returned by overflow()) on failure.
 See also
| invokes xsputn()
(public member function)