❤Something new learned in the class:
❀Why computing? —— to
change the society
❀How computing change the society? ——
privacy, property, democracy……
（Related with RSM: A lot of industries now are using computing to
help them proving the productivity.）
❀An overview of the class contents —— Two
tracks: Programming & Social Issues
❀ What to do with computer machines: Algorithms
Examples:
1) Multiplication
1) Multiplication
2) PBJ (with an in-class experiment, which seems to be really
delicious LOL)
From the PBJ sandwich program, I learned
that
a) Sequence is really important,
b) We should try our best to find out all the possibilities of the
changed-conditions,
❀Another example: paper folding
❀Algorithm is really old. (An old example of algorithm: Euclid’s
GCD)
 |
| A New Adventure In Computer Science! |
❤ Challenges I met this week
❀GCD algorithm confused me because I am not sure that whether the
sequence of n1 and n2 matters.
❤The test/quiz/assignment
Dun have one this week. O(∩_∩)O~
❤Feedback to the others
❤❀※
❤Feedback to the others
I read Emily Zhang's blog this week and I felt like we had the same feeling about the Dr.Racket system at first. So I left a message:
"Haha I felt really confused at first too! But feeling much better now :D How about you? :P"
CSC 104 Slog-Week Two (Jan 14th - Jan 20th)
❤Something new learned in the class:
❀The language we are using is Intermediate Student with Lambda.
❀In the Dr.Racket, we can edit the image, string, numbers and TRUE/FALSE.
❀ctr.D make a full screen
❀>(string-length “A Sentence”)
9 ——(we will get a number)
>(Above ❤ ❀ ※)
❤
❀
※
>(beside ❤ ❀ ※)
 |
| Flip vertically and horizontally |
>(+ 1 2)
3
>(* 1 2 3 4)
24
>(and true false) ——both shud be true
false
>(or true false) ——either is true
true
>(not true)
false
>(not false)
true
>(>3 5)
false
>(<3 5)
true
>(flip-vertical {an image})
>(flip-horizontal {an image})
❀Not all the problems can be solved by computing
e.g. halting problem
 |
| Halting Proble |
❀algorithm that took so long
e.g. Fibonacci sequence (when we enter 30 it start to take a long time to calculate)
❤ Challenges I met this week
❀Didn’t quite understand the True/False program at first
❀Had a difficulty in changing the CDF password :( but it turned out that I successfully changed it at last. Thanks for Doris’s help :D
❤The test/quiz/assignment
❀We had a quiz which was pretty easy :D
❤Feedback to the others
I read Wendall Hsu's blog this week. She said that "Like other programming languages, make sure to keep track of all the parentheses. Putting a parenthesis in the wrong spot will lead to an error and adding one too many will also lead to an error. " and I totally agree with that since I always make the same mistake. So I left the message:" I always forget parentheses too :P Fortunately we can check it by click the "run" button. It helps a lot!"
❤Feedback to the others
I read Wendall Hsu's blog this week. She said that "Like other programming languages, make sure to keep track of all the parentheses. Putting a parenthesis in the wrong spot will lead to an error and adding one too many will also lead to an error. " and I totally agree with that since I always make the same mistake. So I left the message:" I always forget parentheses too :P Fortunately we can check it by click the "run" button. It helps a lot!"
