Tutorial
Today we got our first quiz result, surprisingly I did get 100% but I got one question wrong, if we got 4 out of 5 right we would get full mark. Nevermind it is still a 100 percentage, I should more attention about details next time. This tutorial was focus on quiz later.
Lecture
We took our secong quiz today, it was not hard, that's it. Today we learned Representing information.
Two design ideas that computer have covered：
1. digital: Using discrete, sharply-changing, rather than analog, smoothly-changing states
2. Two states os the smallest, most easily designed
Boolean Logic
Binary:
The binary numeral system, or base 2-number system, represents numeric values using two symbols: 0 and 1. More specifically, the usual base-2 system is a positional notation with a radix of 2. Because of its straightforward implementation in digital electronic circuitry using logic gates, the binary system is used internally by almost all modern computers and computer-based devices such as mobile phones.
Binary Additoin:
0+0=0
0+1=1
1+0=1
1+1=10
Binary Subtraction:
0-0+0
1-0=1
1-1=0
10-1=1
Binary Multiplication:
0*0=0
1*0=0
0*1=0
1*1=1
Binary Division:
0/1=0
1/1=1
We now started learning Animations in DrRacket, more advanced than before. We had new codes, big-bang, on-tick, show-it, on-draw, stop-when, on-key etc.
1. digital: Using discrete, sharply-changing, rather than analog, smoothly-changing states
2. Two states os the smallest, most easily designed
Boolean Logic
Binary:
The binary numeral system, or base 2-number system, represents numeric values using two symbols: 0 and 1. More specifically, the usual base-2 system is a positional notation with a radix of 2. Because of its straightforward implementation in digital electronic circuitry using logic gates, the binary system is used internally by almost all modern computers and computer-based devices such as mobile phones.
Binary Additoin:
0+0=0
0+1=1
1+0=1
1+1=10
Binary Subtraction:
0-0+0
1-0=1
1-1=0
10-1=1
Binary Multiplication:
0*0=0
1*0=0
0*1=0
1*1=1
Binary Division:
0/1=0
1/1=1
We now started learning Animations in DrRacket, more advanced than before. We had new codes, big-bang, on-tick, show-it, on-draw, stop-when, on-key etc.
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