How to Design Programs

Question 1

How to Design Programs

A good program comes with a short write-up that explains (4 things):

Answer 1

A short write-up that explains:

• what it does
• what inputs it expects
• what it produces
• assurance that it actually works

Question 2

How to Design Programs

Recipe for designing a function (5 steps):

Answer 2

In the comments:

1. Express intention for representing information as data
2. Write down a signature, a purpose statement, and a function header
3. Illustrate the signature and purpose with functional examples

Then:

4. Stub the body of the function
5. Write and test the code

Question 3

How to Design Programs

When designing functions for a program it’s a good idea to have a wish list.
What does a wish list entry contain?

Answer 3

A meaningful name, a signature, and a purpose statement.

Question 4

How to Design Programs

Recipe for designing a program (4 steps):

Answer 4

1. Define constants
2. Design a data representation for all possible states (Choose simple forms of data)
3. Design a number of functions
4. Create a main function

Question 5

How to Design Programs

Good programmers establish ___________ for all aspects of their programs.

Answer 5

a single point of control