1. Announcements Survey feedback: summary Quiz: HW 7:
Purpose
HW 7:
Sorry about Ethics Essay …
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

2. What We’ve Learned So Far
We’ve ripped right along, and learned a lot!
What We’ve Learned So Far
Kelvin Sung
University of Washington, Bothell
(* Use/Modification with permission based on Larry Snyder’s CSE120 from Winter 2011)
© Lawrence Snyder 2004

3. Mid-Term … The Midterm is Wednesday – Open everything  EXCEPT …
No use of calculator
No use of computer: except reading of pdf/powerpoint
lecture notes, textbook, everything else is ok.
Pencil or Pan, will be on papers.
Source code: no color highlight!!
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

4. Properties of Computation
Composed of commands or instructions
Presented in sequence; executed in sequence
Commands direct an agent
Keeping track of the “current instruction” in the sequence: yellow box in Lightbot; program counter for computers
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

5. Properties of Computation (cont.)
The execution sequence can be interrupted to execute a function – suspend current sequence, go to function definition, run – so that when complete, return is to point of suspension
Conditional commands (If-statements) skip instructions; looping repeats instructions
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

6. LightBot and Abstraction
Command Sequence
Program Counter
Functional Abstraction
Def Func(), Calling Func()
Inerations
7:(instructions)
Applying concepts in solving problems
Given a bot problem, how would you solve it
If you have to use a specific function
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

7. Abstraction
Functional abstraction: find a sequence of operations that perform a “meaningful” operation: package them w/name, and precise specification
Hw 1: Lightbot 2.0; std name, no params, 8 insts.
Hw 2: Symbolic Lightbot: name, no params, n insts.
Hw 3: Symbolic Lightbot: function, params, n insts.
When functionally abstracting you create a concept – a new idea (w/ name & meaning) to use without “worrying about the details”
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

8. From LightBot to XNA Programming Environment Concepts:
IDE: Development Environment
Project and source code
Compile/Run
Programming Concepts:
Declare, Create, and Change
{} and ()
InitializeWorld() and UpdateWorld()
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

9. Variables Naming rules Assignments Operators Types of Variables X = 3;
X = 3 + Y
X += 4
Types of Variables
int, float, Circle, Rectangle
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

10. Circles and Rectangles
CenterX/Y, Radius, Width, Height, Texture, Color, Label, LabelColor
What happens when you change these
How to change these to accomplish what you want
Given a few lines of code:
Describe what will you see
Describe the behavior you expect
Given a behavior, how will you code?
Change the ball size by ThumbStick.Left.X?
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

11. Parameters Parameters, arguments, and values
Parameters for creating circles/rectangles
Define parameters to represent speed
Exercise-5:
speedX/Y are used to control ball centerX/Y
Player controls speedX/Y by providing values through thumbStick.Right
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

12. Conditions (if) if (something) { doFirst doSecond } How to read this?
What would happen?
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

13. Privacy & Social Use of I’net
Privacy – right of people to decide the extent they reveal information about themselves
Discussion: Revealing other people’s information
Guidelines for public discourse on I’net: Offensen…
guidelines for posting on social network
Ethics –
What does it mean?
Ten commandments of computer ethics
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

14. Topic: Representing Information
Information is physically represented by the presence or absence of some phenomenon at a specific place or time –
Properties: discrete, be able to set it / detect it
Give examples of these properties
Direct use of properties: winking; dog barking;
Other examples … abstract all as binary
Numbers represented in binary
Count, add, covert to/from decimal
Difference between and ?
Float and integer presentation of color
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

15. Binary The number 77 can be written in binary … what is it?
The binary number is what decimal number?
Given binary 0101, 0101 what is their sum
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

16. Game Changers …
Many technological advances have come since WWII, but only a few are ‘game changers’ … what are examples?
The invention of Integrated Circuits was a game changer because to properties, which were?
http is a language computers speak to each other that enables what?
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)

17. Summary
I have taught a LOT of capabilities and information – and you have worked hard to learn it! Good going!!
What questions remain?
7/13/2019
Kelvin Sung (Use/modify with permission from © 2010 Larry Snyder, CSE)