==========C++ String Streams==========

String streams are similar to the <iostream> and <fstream> libraries,
except that string streams allow you to perform I/O on strings instead
of streams. The <sstream> library provides functionality similar to
[[c/io/sscanf]] and [[c/io/sprintf]] in the standard C library.

Three main classes are available in <sstream>:

  * stringstream - allows input and output
  * istringstream - allows input only
  * ostringstream - allows output only

String streams are actually subclasses of iostreams, so all of the
functions available for iostreams are also available for
stringstream. See the [[io/|C++ I/O functions]] for more information.

In addition, string streams also supply the following functions:

|[[constructors|Constructors]]|create new string streams|
|[[operators|Operators]]|read from and write to string streams|
|[[rdbuf]]|get the buffer for a string stream|
|[[str]]|get or set the stream's string|