NOTE: You may work with others on this homework, just mark your paper with the names of the students who worked together on the assignment.

PURPOSE: The purpose of this homework is to examine some of the issues and concepts related to parameter passing and functional programming.

• Do Exercise 8.2 in your textbook, page 486. Briefly explain your findings.
• Do Exercise 8.7 in your textbook, page 487. Show the different results and explain the reasons for the differences.
• Do Exercise 11.5 in your textbook, page 651.
• Do Exercise 11.6 in your textbook, page 651.
• Create an inheritance hierarchy of classes that reflects the shared and unique properties of imperative, functional, and object-oriented programming languages. The overall objective is to think about what parts of a language implementation could be shared among implementations of languages from different categories and what parts would be unique to each category. For example, one aspect to consider is the different kinds of control flow. You can consider that the syntax is different but the semantics of certain constructs is basically the same.

  You should include:

  (a) definitions of classes other than the language classes and base class, that would be used in the implementation of these languages. An example might be the class for control structures.

  (b) a drawing of the inheritance graph showing the relationships between classes,

  (c) names and type signatures of the methods and data members of each class,

  (d) for each class, method, and data member, a single sentence that briefly states its role/capability.

  This is very open-ended on purpose, to give you freedom in thinking about the various commonalities and differences. One could imagine a method for "iteration" or one for "variable declaration", shared among the different classes with slightly different syntax, for example.

  Your grade on this exercise will be based on your demonstration of the language differences and commonalities, but just as importantly, on the demonstration of the concepts of data abstractionn, object-oriented design, inheritance, method overloading/overriding, and polymorphism.

  Last Change: November 7, 2000 / pollock@cis.udel.edu