Exit Codes

EXIT_SUCCESS and EXIT_FAILURE are constants defined in the C++ language.

They are MACRO constants defined in cstdlib and stdlib.h

References:
Effective STL: 50 Specific Ways to Improve Your Use of the Standard Template Library by Scott Meyers. Addison-Wesley, 2001.
C++ Templates by David Vandevoorde and Nicolai M. Josuttis. Addison-Wesley, 2003
http://www.gotw.ca