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Old 07-08-2008, 06:23 AM   #1
gaynut
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Question hexa,binary,octal additions in shell scripting


hi ,

can anybody tell me how to add,sub,mul,division functions for octal,hexadecimal,binary numbers?

thanks

~ gaynut
 
Old 07-08-2008, 06:50 AM   #2
nx5000
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One way is to use iBase and oBase with bc:

Octal:
echo "obase=8;8+8" | bc -l
20

Hex:
echo "obase=16;8+8" | bc -l
10

Bin:
echo "obase=2;1+1" | bc -l
10

From hex to binary:
echo "ibase=16;obase=2;15*1A" | bc -l
1000100010



Going from decimal to octal back to decimal:
echo "ibase=2;obase=2;10*11;obase=1010;ibase=1010;15*10" | bc -l
110
150

Last edited by nx5000; 07-08-2008 at 06:51 AM.
 
Old 07-08-2008, 09:54 AM   #3
smoked kipper
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You can do it in the shell with arithmetic expansion, if integers are sufficient.

Code:
# echo $(( 0x100 / 010 ))
32
It can handle any base using "base#number" syntax, so for binary:

Code:
# echo $(( 2#10000 / 4 ))
4
 
Old 07-09-2008, 01:40 AM   #4
gaynut
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thank u

~ gaynut
 
  


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