xsgetn(s, count) of the most derived class.
count characters from the input sequence and stores them into a character array pointed to by
s. The characters are read as if by repeated calls to
sbumpc(). That is, if less than
count characters are immediately available, the function calls
uflow() to provide more until traits::eof() is returned.
 Return value
The number of characters successfully read.
|This section is incomplete|
Reason: no example
 See also
| invokes xsputn() |
(public member function)