CSC 160
Homework 5

Assigned Mar 7, due Mar 26

Pair Programming

You are encouraged to do this assignment in a two-student team, following the principles of Pair Programming. This does not mean "you do these problems and I'll do those"; it means both students work together, looking over one another's shoulders, to complete all the problems. Turn in one copy with both names on it. I recommend that you choose a different partner for the next homework assignment, so if you don't get along with this partner, remember it's only for a week :-)

Problems

The problems to be turned in require defining 15-20 functions. You have 19 days, but a week of that is Spring Break; assuming you won't realistically do much homework over Spring Break, plan on about two functions a day.

• Warm-up (not graded): Try all of the "Worked Exercises" and "Practice Exercises" as you get to them: either type them in from the book, or download them from here, then run them and make sure they do what you expect.
• Exercises 8.3.6, 8.3.7, 8.3.8 (which build on one another; do them in order, but only turn in the last one. If you don't get them all working, turn in the last one you've got working.)
• Exercise 8.4.4
• Exercise 8.5.2
• Exercise 8.5.3
• Make up an interesting animation of your own using a numeric model. Go wild.
• Exercises 9.2.2 through 9.2.4
• Exercises 9.2.7 and 9.2.8
• Exercise 10.2.3
• Exercise 10.2.4
• Exercise 10.2.6
• Make up an interesting animation of your own using a string model. Go wild.

What to turn in and how

All of these are programming problems. I want to see all the steps of the recipe. Inventories and function bodies are normally inserted into the function skeleton (rather than turned in separately). I recommend putting all of the programming problems in one big Definitions pane, because some of them depend on others.

It's difficult for me to grade your testing of these functions, but be assured that I will test them, and if they don't work, it'll hurt your grade, so it's to your advantage to test them before turning them in.

Send me an e-mail, attaching the file containing your saved Definitions pane. (Make sure to save it, then test it, then e-mail it to me, or I may end up grading an out-of-date version.) I should be able to open this file in DrRacket, hit "Check Syntax", and get no error messages. Don't bother turning in the file until it at least passes a syntax check.

If there's a particular function that you can't get working, turn in as many steps of the recipe as you've managed to do, commented out (so they don't mess up the other functions).

Also turn in a log of how many errors of different kinds you encountered in the assignment, with brief comments describing each one ("mismatched parentheses" is self-explanatory, but more complex errors might need more description). Note that "errors" means not only error messages from DrScheme, but also wrong answers. You may do this using the PSP forms, or simply by keeping track in a text file or on paper and turning it in.

Grading standards

In order to get you feedback quickly, I won't actually grade all of these problems; the rest should be considered practice.

Error log:       25 points
(I'm not grading on how many or how few errors you encountered, only on whether you recorded them correctly.)

The table below has columns for each step in the design recipe, and a row for each function that I decide to grade. You won't turn in a separate skeleton, inventory, and body, but rather write a skeleton and then add inventory and body to turn it into a complete definition. However, if you don't get the definition working, you'll still get partial credit for a correct contract, skeleton, and/or inventory.

General skills:

Total:         /???

What to turn in and how

All of these are programming problems. I want to see all the steps of the recipe. Inventories and function bodies are normally inserted into the function skeleton (rather than turned in separately). I recommend putting all of the programming problems in one big Definitions pane, because some of them depend on others.

It's difficult for me to grade your testing of these functions, but be assured that I will test them, and if they don't work, it'll hurt your grade, so it's to your advantage to test them before turning them in.

Send me an e-mail, attaching the file containing your saved Definitions pane. (Make sure to save it, then test it, then e-mail it to me, or I may end up grading an out-of-date version.) I should be able to open this file in DrRacket, hit "Check Syntax", and get no error messages. Don't bother turning in the file until it at least passes a syntax check.

If there's a particular function that you can't get working, turn in as many steps of the recipe as you've managed to do, commented out (so they don't mess up the other functions).

Also turn in a log of how many errors of different kinds you encountered in the assignment, with brief comments describing each one ("mismatched parentheses" is self-explanatory, but more complex errors might need more description). Note that "errors" means not only error messages from DrScheme, but also wrong answers. You may do this using the PSP forms, or simply by keeping track in a text file or on paper and turning it in.

Grading standards

In order to get you feedback quickly, I won't actually grade all of these problems; the rest should be considered practice.

Error log:       25 points
(I'm not grading on how many or how few errors you encountered, only on whether you recorded them correctly.)

The table below has columns for each step in the design recipe, and a row for each function that I decide to grade. You won't turn in a separate skeleton, inventory, and body, but rather write a skeleton and then add inventory and body to turn it into a complete definition. However, if you don't get the definition working, you'll still get partial credit for a correct contract, skeleton, and/or inventory.

General skills:

Total:         /???

What to turn in and how

You may turn in problem 7.6.2 on paper or by e-mail.

What to turn in and how

When you define a function, I want to see all the steps of the recipe, except that in the course of writing a function body, you normally replace the "..." that was in the function skeleton.

An animation may require writing one, two, or more new functions; once all these functions work correctly on their own, you should write a big-bang call in the Definitions pane to actually run the animation.

I recommend putting all of the programming problems in one big Definitions pane, because some of them depend on others.

Send me an e-mail, attaching the file containing your saved Definitions pane. (Make sure to save it, then test it, then e-mail it to me, or I may end up grading an out-of-date version.) Make sure to put your name in the Subject line!

If there's a particular function that you can't get working, turn in as many steps of the recipe as you've managed to do, commented out (so they don't mess up the other functions).

Also turn in a log of how many errors of different kinds you encountered in the assignment, with brief comments describing each one ("mismatched parentheses" is self-explanatory, but more complex errors might need more description). Note that "errors" means not only error messages from DrScheme, but also wrong answers. You may do this using the PSP forms, or simply by keeping track in a text file or on paper and turning it in.

Grading standards

In order to get you feedback quickly, I won't actually grade all of these problems; the rest should be considered practice.

Error log:       25 points
(I'm not grading on how many or how few errors you encountered, only on whether you recorded them correctly.)

The table below has columns for each step in the design recipe, and a row for each function that I decide to grade. You won't turn in a separate skeleton, inventory, and body, but rather write a skeleton and then add inventory and body to turn it into a complete definition. However, if you don't get the definition working, you'll still get partial credit for a correct contract, skeleton, and/or inventory.

General skills:

Total:         /???