CSC 160 Fall 2007 - Homework 9
Assigned Nov 30, due MONDAY Dec 10

Log the time you spend on this assignment using a log sheet with all the same columns as the one attached to the PSP Chapter 3 handout. For your convenience, I have attached a blank Microsoft Excel copy of it here.

Read Chapter 13 of Dr. Bloch's textbook.

Do the following exercises in DrScheme on your own or in pairs (using the ideas in the Pair Programming article):
  • Exercise 11.4.1 from Dr. Bloch's textbook: Develop a function choose-picture that takes in one of the strings "basketball", "baseball", or "calendar" and returns a picture of it. For any other string, return a string stating "Out of Stock". Be sure to show ALL Design Recipe steps (including Data Analysis) and 4 well-chosen examples. Use the following pictures in your function definition: .

  • Exercise 4.4.2a from How to Design Programs: Develop the function tax, which consumes the gross pay and produces the amount of tax owed. For a gross pay of $240 or less, the tax is 0%; for over $240 and $480 or less, the tax rate is 15%; and for any pay over $480, the tax rate is 28%. Be sure to show ALL Design Recipe steps (including Data Analysis) and at least 5 well-chosen examples.



    • Submitting your Assignment
    Please submit your Definitions Pane, Interactions Pane, and Log Sheet, using the Digital Dropbox in the Tools menu on Blackboard. Be sure to include your first and last name(s) in the Name Box on Blackboard, and click Send File (not Add File)!

    The file name for the Definitions Pane needs to be "hw9[section][LastName]Def.scm" where:
  • [section] is replaced by -01 for the 9am class and -02 for the 10am class.
  • [LastName] is replaced with your last name(s).
  • For example, if I were submitting this assignment and I were in the 10am class, I would name the file "hw9-02WittensteinDef.scm".

    Similarly, the file name for the Interactions Pane needs to be "hw9[section][LastName]Int.scm", and the file name for the Log Sheet needs to be "hw9[section][LastName]".

    Please let me know if this is not clear or if you are unsure exactly what filename to use. Part of your grade is using the correct filenames.


    GRADING
    Question Point Value
    11.4.1 45
    Contract 3
    Purpose 3
    Data Analysis 10
    Examples 8
    Skeleton 3
    Function 15
    Interactions Pane 3
    HtDP 4.4.2a 45
    Contract 3
    Purpose 3
    Data Analysis 8
    Examples 10
    Skeleton 3
    Function 15
    Interactions Pane 3
    PSP Log 5
    Filenames 5
    Total 100




    Last Modified: 12/4/07