BOOST is a directory of C programs which demonstrate the use of the BOOST libraries.
The BOOST libraries are a collection of free, peer-reviewed portable C++ libraries, intended to work with with, and extend, the C++ Standard Library.
BOOST is distributed under the BOOST Software License
Additional software, documents and data supplied here are distributed under the Gnu LGPL license.
EXAMPLE1 is a program which reads integers from stdin, triples them, and writes the results to stdout; it does not terminate, and must be killed externally;
EXAMPLE2 is a program which reads a text file and prints out the subject lines, assuming the input file is a mail message.
You can go up one level to the C++ source codes.