- Designing and Testing Programs video
- Examples to figure out what you need
- Devise algorithm before coding (design)
- Test using examples
- Examples for spirals
- Archimedean
- Radius increases by 1 unit per turn, 5 turns, initial radius = ?
- Radius increases by 1, 1 1/2 turns, initial radius = ?
- Special case: radius increases by 0, 5 turns, initial radius = ?
- (Circle)
- Edge case: “increase” by -1 unit per turn, 5 turns, initial radius = 7
- Identified inputs (increase, # turns, initial radius)
- Logarithmic
- Natural log: radius increase by factor of e
- Factor of 2
- Factor of 1 (circle)
- Factor of 0.5 (shrinking spiral)
- Helped understand problem, e.g., connection to word “logarithmic”
- Archimedean
- Finish plotting spirals