CompSci 4 - Classwork - Nov 3, 2005
5 pts

Today's classwork goes along with Chapter 9, Section 1. You will be writing lists and manipulating them.

The following work needs to be checked off when you have completed it.

• First download the file listfun.a2w from the CPS 4 web page.

• Ignore the tennis balls for today's work until the last item. You do not need them for anything with the animals.

• Create a list with all six animals in it.

• Write the following methods. You should use "For all in order" or "For all together" where appropriate.
  1. Method SpinOneAtATime

     Spin each animal all the way around once.

  2. Method jumpUpAndDownWhileWiggling

     All the animals should do the following at the same time, jump up .25 meters and come back down to the ground. They should all wiggle their legs while they are in the air.

  3. Method compareHeightsWithOnePlayer

     This method passes in a parameter which is one of the animals. It then compares this animal with all the animals in the list, one at a time. Whenever it compares, if the heights are the same, they animals being compared should say "the same". If the heights are different, the one who is shorter should say "I'm shorter" and the one who is taller should say "I'm taller."

  4. Method compareAllHeights

     Compare all the heights of all pairs of animals. For each animal, you should have it say "Compare Me" and then compare it with all the other animals, one at a time by calling compareHeightsWithOnePlayer.

  5. Since we didn't use the tennis balls, lets make them all invisible. Create a list, put them in the list and then create a method that does something to every ball (your choice) one at a time, and then makes them all invisible at the same time.

If you finish early, feel free to embelish your animations.