Defined in header
Inserts a null character into the output sequence os as if by calling os.put(CharT()).
This is an output-only I/O manipulator, it may be called with an expression such as out << std::ends for any
out of type std::basic_ostream.
This manipulator is typically used with std::ostrstream, when the associated output buffer needs to be null-terminated to be processed as a C string.
Unlike std::endl, this manipulator does not flush the stream.
|os||-||reference to output stream|
 Return value
os (reference to the stream after insertion of the null character).
Sample text: 42
 See also
(deprecated in C++98)
| implements character array output operations |