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http://www.hackerschool.org/HS_Boards/zboard.php?id=Free_Lectures&no=655 []


C α׷Ӱ ˾ƾ ͵ - Chapter 1.

輺 (sunghun84@nate.com)

Chapter 1.

(1) Ͽ ϴ°?
(2) 2
(3) 8
(4) 16

(1) Ͽ ϴ°?

? ٷ Դϴ.

߿ 츮 ϰ ִ° 60(, µ ̴ . 0~59 , 60 Ǿ?? ڸøϴ ü)̳, 10(0~9 , 10 Ǿ ڸø ϴ 츮 ⺻ ¹) ֽϴ.

߿ ⼭ 2,8,16 ִµ, 鿡 , δ 2 ִ ̶ ̴ϴ.

2(Ȥ 2 ˾ƾ ɱ? ǻʹ 0 1ۿ ϱ Դϴ. ǻʹ 带 , 帣 ϴ°ν, 2 ϸ ϰ ˴ϴ. 2 , ¸ ǥϴ ο͵ .

׷ Ӱ, ޽ ̷͵ 0 1 Ǵ°Ŷ? Ƴ? ϽǺе鵵 ٵ, װͿ ؼ 2° é Ʈ Ģ ڼ ϵϰڽϴ.

16 2 ſ 2 4 ϰ ̿DZ⵵ մϴ. 8 16 ϰ 2 3 Ȥ, 10 ȣ ȯ ǰ ˴ϴ.

, ǻʹ () ϴ Դϴ. ׷ , ǥϴ ( ߿ ǻͰ ϴ 2 ) ؼ ˾Ƶ־ ʿ䰡 ִ Դϴ.

(2) 2

Ʊ ߵ, ǻʹ 0 1ۿ ν մϴ.

2 0 1ν Դϴ.

ڸ 2 Ǿ ڸ ø Ͽ 10 ǥϴ ü.

2 ǥ

0011 (2)

Ͱ ǥϰմϴ. ȣ ݵ ϴ° ƴϰ, ȥ ϰմϴ.

2
10

0000
0

0001
1

0010
2

0011
3

0100
4

0101
5

0110
6

0111
7

1000
8

1001
9

1010
10


ǥ ø, 밭  ǰ̴ϴ.
10 11϶ 2δ ɱ?
׷~ 1011 Ǵ°̴ϴ.


׷...2 ʹ б ٱ?

8 4 2 1
1 0 0 1 (ڸ 1 , Ӹ ġ ŭ ݴϴ)



8 ġ 2 1̴ 8, 4 2ڸ ġ 0̴ ׳ ΰ, 1 ڸ ġ 1̴ 1. ׷ ¼ 8 1 ϸ 9 Ǵ°. ?

Ŀ

128 64 32 16    8 4 2 1
  0   0  0   0     0 0 0 0

̷, ϳ Ҷ ϰ ˴ϴ. ̷ ϴ 2 д ?


׷... ǥҶ  ؾ ұ?

-0011 ̷ ȵdzı?

ƽԵ, 10ʹ ޸ -ȣ Ҽ ϴ.

׷ ֻ Ʈ( տ ִ ֻ Ʈ=MSB θ . Ʈ ¿ ̳ʸ Ʈ= Դϴ) ȣ Ʈ ϰ Ǵ°.

ֻ Ʈ 0̸ , 1̸ ǥ ϱ ߽ϴ.

0001 1, 1001 -1 ̷ .


׷ ̰ ֽϴ.

2 .

1001 + 0001 = 1010

(-1)    (1)    (0 ̾ )



2 ڸ ø ߻ϸ Ϲ ڸ ø óָ ˴ϴ.

װ ׷, ̻? 1010̶...ֻ Ʈ 1̴ ΰ , ڰ 010̴ -2ΰ ... ? 0 ƴϳ׿?

׷ 1 Դϴ.


1 , ǥÿ 0 1, 1 Ű°.

1 ǥڸ,

0001 1, 1110 -1 Ǵ°.


..Ʊ ߸Ǿ -1 1 غ?

1110 + 0001 = 1111

(-1)   (1)    (0̾ )

? ̻?? ֻ Ʈ 1̴ ΰ ....111̶ -7? 0 ƴ? ־ϴ.


׷ 2 ȰԴϴ.

2 0 1, 1 0 ٲĿ 1 ϴ Դϴ.

0001 1, 1111 -1̵Ǵ°.



׷ ٽ... ߸Ǿ -7 7 غô.

1111 + 0001 = 10000

(-1)   (1)      (0̾ )

...̹ ֻ Ʈ 1̱. ׷ ? ׷ ڰ 0000̳׿? ½ϴ. Ǿտ ʰ 1 ϱ Դϴ. ׷ 0000 0 Ǵ°.



2 Ǵ Ƽ̰?

1 Ǵٸ 0 ̱ Դϴ.

1111 1111, 0000 0000 0 0 ǹմϴ.

̿ 2 0000 0000 翬 0̰, 0 1 1111 1111 1 ϸ 1 0000 0000 ǰ, ̶ ʰ 1 ϰ ǹǷ 0 0 ϳ Ǵ°. ̷ν Ʊ -1 1 ϴ 꿡 ʰ 1 ϴ Բ ذ ǽ?



(3) 8

8̶ 0~7 Դϴ.

8 ڸ 7 Ѿ 8 Ǿ ڸ øϿ, 10 ǥϴ üԴϴ.

8 ǥҶ

12 (8)

̷ ȣ 8 ٿ ǥϰ մϴ. 2 ǥ ʿ ϴ.
C  ÿ 0( 0) ٿ .

Ʒ ǥ ø, 2, 8, 10 踦 ƽǼ ̴ϴ.

2
8
10

0000
0
0

0001
1
1

0010
2
2

0011
3
3

0100
4
4

0101
5
5

0110
6
6

0111
7
7

1000
10
8

1001
11
9

1010
12
10




8 ü ǹ̵ ߿, 2 ȯ ſ ϴٴ ֽϴ.

ٷ  ǥϸ Ǵ°.



4 2 1
1 1 1 (7Դϴ)

8 ٲܶ, 4+2+1=7 Ǵ°.



̷

4 2 1   4 2 1
1 1 0   0 1 1

4+2=6   2+1=3

8 63 Ǵ°̴ϴ.


10 524 8 غô.

524 / 8 = 65 4

65 / 8 = 8 1

8 / 8 = 1 0

1 / 8 = 0 1

1014(8)

, ϸ, 10, 8 ֽϴ.



ٽ 8 1014 10 ٲ㺾ô.

1014(8) = 4 x 8 0 + 1 x 8 1 + 1 x 8 3
          = 4 x 1 + 1 x 8 + 1 x 512
          = 4 + 8 + 512
          = 524

524(10)

ڸ 缭 ָ, 8 10 ȯǴ°̴ϴ.


(4) 16

16̶, 0 15 ٰ, 16 Ǿ ڸøҶ 10 ǥϴ մϴ.

׷... ̻? 0~15 ٸ, 0~9 , 10 15 ڸ ø 10~15 Ǵϱ.

׷ 10~15 A~F ǥϰ ˴ϴ.

16 8 2 ,

AF (16)

ǥ ֽϴ.

C ޾ 16 ǥ տ 0x ( 0 ĺ x) ٿ մϴ.


Ʒ ǥ ø ǥ ϽǼ ̴ϴ.

2
8
16
10

0000
0
0
0

0001
1
1
1

0010
2
2
2

0011
3
3
3

0100
4
4
4

0101
5
5
5

0110
6
6
6

0111
7
7
7

1000
10
8
8

1001
11
9
9

1010
12
A
10

1011
13
B
11

1100
14
C
12

1101
15
D
13

1110
16
E
14

1111
17
F
15


16 8ó 2 ȯ ٰ ߾?

16 2 8 ȯϴ Ͱ մϴ. 2 4  16 ȯϸ Ǵ°.

8 4 2 1
1 1 0 0 (12Դϴ)

8+4=12ε, 12 ĺ C ǥϱ ,

8+4=C ǥҼ ִ°.

8 4 2 1    8 4 2 1
1 0 1 0    0 0 1 1

8+2=A   2+1=3

A3 4ڸ  ȯν 2 б ϴ°.

16 Ϻ(Nibble) ⺻ ˴ϴ. Ϻ̶ Ʈ 4  ǥϴ ν, 16 ǥ ְ .

̰ Ͽ ˾ƺôµ, 2, 8, 16    ִٴ ˼ ־ϴ. Ư 2 γ ȯ ٴ ͵ .


ó : Ǿ


  Hit : 12397     Date : 2007/02/25 04:33



    
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