// cppHearts, copyright 2001 Michael W. Godfrey
// email:  migod@acm.org, migod@uwaterloo.ca
// 
// Copyright details:
//     This code may be freely used for non-commercial personal or research
//     purposes without explicit permission as long as proper credit is
//     given (ie my name and email address appears and this copyright
//     notice is retained unmodified).  Educational use requires explicit
//     permission, but I'll likely say "yes"; I also have a Java version.