The code could be found at http://www.cs.colorado.edu/~main/chapter2/
 

point class includes three files

    The Header file point.h

    The Implementation file point.cxx

    The user file (test file) pointmain1.cxx

NEW point class includes three files

    The Header file newpoint.h

    The Implementation file newpoint.cxx

    The user file (test file) pointmain2.cxx