CSC 104 Slog-Week Six (Feb 11th - Feb 17th)

CSC 104 Slog-Week Six (Feb 11th - Feb 17th)

❤Something new learned in the class:

[History of computing]

❀Some convergence

Two general ideas:Digital& Binary: two state is the smallest, most easily designed

Memory should be reliable, fast and cheap

Magnetic & transistor

Early 50s, change dramatically

1970s was an electronic switches

❀ Boolean logic

Simple operators

two values. true and false can be combined (get a signal on a and b and also get a high signal on f ----pay attention to logic

❀ Bitwise operator

A B Cin  -> in

Cout S -> out

A&B addends—can be 1 or 0

0+0=0

0+1=1

1+0=1

1+1=0

e.g.

   1 1 1    ->Cin

1011  ->A

+  101  ->B

------------

10000

  ❀ binarby，decimal

multiply each digit by the appropriate power of 10

e.g. 5897=5*1000 + 8*100 + 9*10 +7*1

①what happens when u add zeros on the right

②what happens when u drop digits from the right

àa general rule: for① multiply by 10, for② divided by 10 and then round down

multiply each digit by the appropriate power of 2

1011=1*8+0*4+1*2+1*1

①what happens when y add zeros on the right

②what happens when u drop digits from the right

àa general rule: for①multiply by 2 , for ②divided by 2 and round down

Binary

❤ Challenges I met this week

  ❀Binary

  I never learned this before so it is kind of not that familiar to me. However it’s not a big deal because I learned really hard on the class. By the way, for this class, I felt a little bit bored when we were asked to discuss what will happen if a decimal number is added or dropped a zero. I can understand that it is the basic of understanding the effect of binary numbers added or dropped by zeros but I wish that it could move faster on those things which are not that difficult :)

Though I don't smoke....

  ❀SLOG

  I read some other students SLOGs and I start to feel confused about the form of SLOG. Is it okay to write it like what I am doing now (like now I always summarize the things that I learned this week and I feel it looks more like a notebook rather than a blog)? I am really not sure whether this is the type of SLOG that you are looking forward to reading and give a high mark at last. Please tell me if there is anything that I can do to improve my Slog. THANKS VERY MUCH.

❤The test/quiz/assignment

  I didn’t do well in this quiz. I feel like I made one wrong (but since I haven’t got the quiz paper so I am not that sure about that up to now).

  It was about the structure of values.

Structure of Value

I will do a correction and summary in next SLOG when I get my paper next week. Hopefully I will get to totally understand it at that time.

❤ Feedback to other's blogs
I read Emily Zhang's blog this week. She said she did well in Test one and she was really busy because she had two tests this week! Oh my god that's really horrible. I never had two tests in the same week. Wish she can do well in the final exam!
I left the comment :"Good luck with your final test! :D"