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Writing Your Own Procedures

CSC 151 Sept 9 th , 2019. Writing Your Own Procedures. Agenda. Preliminaries (8:30-8:40) Quiz Debrief (8:40-8:55) Procedures (8:55-9:05) Lab Time (9:05-9:45) Wrap-up (9:45-9:50). Preliminaries (8:30-8:40). Peer Support Events

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Writing Your Own Procedures

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  1. CSC 151 Sept 9th, 2019 Writing Your Own Procedures

  2. Agenda • Preliminaries (8:30-8:40) • Quiz Debrief (8:40-8:55) • Procedures (8:55-9:05) • Lab Time (9:05-9:45) • Wrap-up (9:45-9:50)

  3. Preliminaries (8:30-8:40) • Peer Support Events • Frisbee tournament: All day Saturday and Sunday at Middle School Fields

  4. Quiz Debrief (8:40-8:55) • Actually out of 9 • Last question was tricky/not something you’d seen, sorry!

  5. Quiz Debrief (8:40-8:55) • Flour: Input • Stir until all dry ingredients are moistened: Subroutine or Repetition • If dough sticks to rolling pin…: Conditional • Dough: Variable • Arrange the cookie dough balls…: Subroutine or Repetition

  6. Quiz Debrief (8:40-8:55) • Why is flour the input (and not dough)? • It isn’t created in the procedure, must be put in • Different cookies are created depending on the flour put in

  7. Quiz Debrief (8:40-8:55) • (* orange (- apple orange banana)) • 27 • Subtraction can take more than two arguments, works left to right (different than (reduce – 1 2 3 4))

  8. Procedures (8:55-9:05) • With your neighbor, try to recall the three different ways to create a procedure that adds 3 to a number

  9. Procedures (8:55-9:05) • Three ways to make a procedure that adds 3 to a number: • (define plus3 (o increment increment increment)) Composition • (define plus3-a (lambda (number) (+ number 3))) Lambda • (define plus3-b (section + 3 <>)) Sectioning

  10. Lab Time (9:05-9:45)

  11. Lab Time (9:05-9:45) • Write up: None! We’ll continue this lab on Wednesday

  12. Wrap-up (9:45-9:50) • Upcoming Work: • Assignment 2 due tomorrow at 10:30pm • Read about pair programming for Wednesday

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