1. Input, Process, Output
Washing dirty clothes
Process
Output
Input

2. Input, Process, Output
Frying an egg
Process
Output
Input

3. Inputs Processing Output 1 length breadth area = length x breadth area2
price of 20
price of 20 ÷ 20
price of 1 3
console cost
game 1 cost
game 2 cost
total = console +
game 1 + game 2
total 4
mark 1
mark 2
mark 3
total mark = mark 1 +
mark 2 +
percentage = (total mark
÷ 60) x 100
percentage

4. Starter Question
In your jotter identify the inputs, process and output for the following:
A program to calculate then display the cost of a pair of trainers if a 10% discount is to be given.
Input: cost
Process: total = cost x 0.9
Output: total

5. Learning Intention
I will learn about the iterative software development process with a focus on the Design stage.

6. Analysis
Design
Implementation
Testing
Documentation
Evaluation

7. Design
Once you have your inputs, process and outputs you can design your program structure.

8. Design Notations 3 design notations: Structure diagram Flowcharts
Pseudocode
Focus today on Pseudocode for input, process and output

9. Pseudocode English-like language used to define problems. Advantages:
easy to understand
easy to break down into smaller steps

10. Pseudocode
Remember the problem to calculate the area of a square from last lesson?
INPUT: length of a side
PROCESS: area = length x length
OUTPUT: area

11. Pseudocode INPUT: RECEIVE length FROM KEYBOARD INPUT: length of a side
PROCESS: area = length x length
OUTPUT: area

12. Pseudocode PROCESS (ASSIGNMENT): SET area TO length x length
[means put length x length into area]
INPUT: length of a side
PROCESS: area = length x length
OUTPUT: area

13. Pseudocode OUTPUT: SEND area TO DISPLAY INPUT: length of a side
PROCESS: area = length x length
OUTPUT: area

14. Pseudocode for area of a square
RECEIVE length FROM KEYBOARD SET area TO length x length SEND area TO DISPLAY

15. Pseudocode Design In your jotter:
write the pseudocode for each of the 4
scenarios you identified inputs, process
and output for last lesson (was on a
worksheet)

16. Success Criteria
I can use pseudocode to design a solution to a problem.