hexa,binary,octal additions in shell scripting

gaynut · 07-08-2008, 05:23 AM

hi ,

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

thanks

~ gaynut

nx5000 · 07-08-2008, 05:50 AM

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

smoked kipper · 07-08-2008, 08:54 AM

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

gaynut · 07-09-2008, 12:40 AM

thank u

~ gaynut