►Introduction to Programming (Fall 2011)
▼2 Meetings
►2.8 Mixed Data
On this page:
2.8.1 Objectives
2.8.2 Exercises (due 2011/  10/  07 08:  45:  00)
2.8.3 Optional Exercises (due 2011/  10/  12 08:  45:  00)
2.8.4 Notes
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2.8 Mixed Data

What do you get, when

you mix a circle and square?

virtual class equals zero

2.8.1 Objectives

At the end of this class, you should know:

At the end of this class, you should be able:

2.8.2 Exercises (due 2011/10/07 08:45:00)

1. Develop the function perimeter, which consumes either a circle or a square and computes the perimeter.

2. Develop structure and data definitions for a collection of zoo animals. The collection includes

  • spiders, whose relevant attributes are the number of remaining legs (we assume that spiders can lose legs in accidents) and the space they need in case of transport;

  • elephants, whose only attributes are the space they need in case of transport;

  • monkeys, whose attributes are intelligence and space needed for transportation.

3. Develop the function fitsHuh. The function consumes a zoo animal and the volume of a cage. It determines whether the cage is large enough for the animal.

4. Add rectangles to our area program from class. For our purposes, the description of a rectangle includes its upper-left corner, its width, and its height.

5. Extend the zoo animal data definition so that animals endorse products, which are compound data described by a product name and a product company. Write a function called endorse that consumes an animal and a product and produces an animal that endorses that product.

6. Develop the function biggest, which consumes two zoo animals and returns the one that takes up more space. (Hint: This requires a new function in the interface that IS NOT biggest.)

2.8.3 Optional Exercises (due 2011/10/12 08:45:00)

7. Develop the function center, which consumes either a circle or a square and computes the center point

8. Add ellipses to our area program from class. (Use Google/Wikipedia to discover what defines an ellipses.)

9. Develop the function accident, which consumes a zoo animal and returns a new animal that has been in an accident. Spiders lose legs in accidents, monkeys lose intelligence, and elephants shrink slightly.

2.8.4 Notes

These notes are primarily for my sake, but I don’t see any reason to hide them from you.

start with Posn

 

Square (nw, length)

Circle (center, radius)

 

Find perimeter of each

 

Define the perimeter function... that takes both

       - data definition

       - communicate to C++ (virtual ... = 0)

       - try

       - add to classes

       - glory

 

Sometimes we know we want to write 'perimeter' first, so we discover our needs top-down

 

Make sure to write print()

 

Write translate (dx, dy)

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