Assignments for
Marine Biology Case Study

The syllabus for the entire course is available online, as is the course home page.

Week 2:

• Read the first section of Part I of the Marine Biology Case Study (pp. 6 - 8). Do the two exercises on p. 8.

Week 3:

• Read the second section of Part I of the Marine Biology Case Study (pp. 9 - 12).

• Histogram Lab (Tuesday)
  Students must be familiar with creating variables, and using if statements and for loops. My version of the lab also requires students to know how to create a rectangle using CMU Graphics, but teachers are welcome to change it to use text-based histograms or another type of graphics.

Week 4:

• Read the third section of Part I of the Marine Biology Case Study (pp. 13 - 18).

• Histogram Programming Project (due Tuesday)
  Extension of Histogram Lab that provides practice with apvector.

Week 7:

• Read pp. 19-28 of the Marine Biology Case Study.

• Programming Project (due Tuesday)
  • Do Application Exercise 6 on p. 28 of the Marine Biology Case Study.
  • Run the case study program with the various input configurations described in the text on pp. 24-27. Answer Analysis Exercises 1-5 on p. 28.

• Read pp. 29-42 of the Marine Biology Case Study. You may find the Object Diagrams for the Marine Biology Case Study useful.

• On p. 42 of the Marine Biology Case Study, do Analysis Exercise 2 and Analysis Exercise 6. (Do not do the modifications in Exercises 4 and 5, just analyze them.)

Week 8:

• Read pp. 43-48 of the Marine Biology Case Study. Answer the "Stop and help" question at the top of p. 44.

• Programming Project (due Tuesday)
  • Do Modification Exercise 1 on p. 42 of the Marine Biology Case Study.
  • Implement operator< for the Position class also. A position is "less than" another position if it is above it (in a row with a lower index) or if it is in the same row but to the left of it (lower column index). Using ==, !=, and <, implement the remaining comparison operators.
  • Do Modification Exercise 1 on p. 48 of the Marine Biology Case Study. Once you have implemented your new FishAt function, you should modify Display Show to call it. For each displayable cell, the body of the nested loops in Show should display a fish if one occupies the corresponding environment position and display blank spaces otherwise.
    CORRECTION: You should use Environment FishAt and Fish IsUndefined in Display Show, rather than IsEmpty and FishAt. (Can you figure out why?)

Weeks 9 and 10:

• Swimmers Programming Project (due Wednesday of Week 10)
  Extension of Marine Biology Case Study. As written, this project uses inheritance. Many of the features of this project, however, such as Breeding, Moving, Aging and Dying, could be implemented without inheritance, just by using Fish. Even Eating could be implemented without inheritance, by using age to determine whether a fish is predator or prey (e.g., fish might eat other fish only if they are at least 2 units younger).