5 September, Day 3
Written Assignment#0 due dates review – note thread online
Systems Assignment #0 due [next time on Chemnitz Student Data]
CSC490 is the most important class you have …
Example, Chapter 1
Read the entire chapter straight through
(ignoring things you don’t understand immediately)
{an application of abstraction }
Then, reread the chapter for cognition (comprehension)
Refer to other resources (other texts, eg Great Ideas…)
effective = computable in a reasonable time
Page 7
Problem 1 – first part was straightforward
- second part was meant to illustrate a concept
namely, computers are dumb
Problem 2 – how would you approach it?
first, understand the problem
understand WALLPAPER algorithm
general design pattern: Outputs – Inputs – Processing
ensure by actually creating and running code
first, understand output (look at page 4) {TEST}
remember, create applications by specifying outputs
first,
then inputs, and finally algorithm
“deskcheck” or “walkthrough” on algorithm
i.e. “playing computer”
algorithm on page 3
[note: add subnumbers 1-4 on inner loop statements]
corna, cornb are the lower left corner of the image
think of them as an “offset” for the “picture” from
0,0
image is created as a raster or bit map image
envision co-ordinate system across CRT
horizontal 0-640 (VGA)
vertical 0-480 (VGA)
side is ?? {students will determine in homework}
x and y are …
the location to “plot” or are they?
note: we need meaningful variable names
“plot” writes a “dot” (no “plot” means no dot)
CSC 490 Course Notes and Outline, © Dr. Gary Locklair, Fall 2006
