xsgetn(s, count)of the most derived class.
countcharacters 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 Template:rlpf. That is, if less than
countcharacters are immediately available, the function calls Template:rlpf to provide more until traits::eof() is returned.
The number of characters successfully read.
|This section is incomplete|
Reason: no example
| invokes xsputn() |
(public member function)