Binary and Hexidecimal

jongeeone · 19 Aug 2010 at 18:22

Anyone good with binary and those sorts of numbers? I'm not :/

"Convert the decimal 211 to a binary number and to a hexadecimal number"

and

"By means of the ASCII table, express your last name written in upper case letters as a sequence of 2 digit hexadcimals"

Means nothing to me

Any help appreciated.

Kenai · 19 Aug 2010 at 18:23

Google (or your course notes) will provide all the help you could need for a question like that.

doiks14 · 19 Aug 2010 at 18:24

What is this for?

I'm pretty sure you can work it out yourself if you concentrate enough on it... I can give it a go in a minute though, a bit busy right now.

tntcoder · 19 Aug 2010 at 18:24

http://www.cleavebooks.co.uk/scol/calnumba.htm Decimal is base 10, hex is base 16, binary base 2.

and

http://www.asciitable.com/

MrRoper · 19 Aug 2010 at 18:25

EDIT

See above

Ascii table
http://www.cs.utk.edu/~pham/ascii.html

Edward01 · 19 Aug 2010 at 18:31

edit nvm got the number wrong

jongeeone · 19 Aug 2010 at 18:32

Ah i was making the ASCII question more difficult than it was - sorted that.

Dj_Jestar · 19 Aug 2010 at 18:32

Do your own homework :/

jongeeone · 19 Aug 2010 at 18:33

It's not homework, i was just looking for help on how to convert from decimal to binary - as everything i have looked at hasn't made much sense. Was hoping someone could simplify it for me.

Dunks · 19 Aug 2010 at 18:34

To be fair, he wasn't asking people to do it all for him...

Trifid · 19 Aug 2010 at 18:35

jongeeone said:
Anyone good with binary and those sorts of numbers? I'm not :/

"Convert the decimal 211 to a binary number and to a hexadecimal number"

211-128=83
83-64=19
19-16=3
3-2=1

Bin=11010011

1101=D
0011=3
Hex=D3

tntcoder · 19 Aug 2010 at 18:35

It is just a single Google search though.

EDIT:

Google will actually even calculate it for you

211 in binary and 211 in hex

Cosimo · 19 Aug 2010 at 18:35

Its easy:

11010011 & D3

Dj_Jestar · 19 Aug 2010 at 18:36

Fine, I retract.. but posting the actual question doesn't help.

These will help..
http://www.google.co.uk/search?q=ascii+to+binary
http://www.google.co.uk/search?q=ascii+to+hexadecimal
http://www.google.co.uk/search?q=binary+to+decimal

Cosimo · 19 Aug 2010 at 18:48

ASCII stands for American Standard Code for Information Interchange.

Look at this table and you should be able to work out the name question:

http://www.asciitable.com/

FRED is 46 52 45 44

BigglesPiP · 19 Aug 2010 at 18:52

Trifid said:
211-128=83
83-64=19
19-16=3
3-2=1

Bin=11010011

Nope, that's -212, 211 is '011010011' unless of course you're using signed binary.

SKILL · 19 Aug 2010 at 18:59

BigglesPiP said:
Nope, that's -212, 211 is '011010011' unless of course you're using signed binary.

Using pure binary (eg not 2's complement, or sign and magnitude, or any other encoding) he's right, and for the scope of this question that's all that's needed.

Also, how did you get -212? 2's complement would be -45, sign and magnitude would be plus or minus 83?

SourChipmunk · 19 Aug 2010 at 19:06

This is all you need:

http://home1.paulschou.net/tools/xlate/

Cosimo · 19 Aug 2010 at 19:38

No need to go online to do hex, decimal, binary, octal conversions. Just use the windows calculator. Scientific mode in Vista and Programmer mode in Win 7.