My Math Forum Ways of STRAIGHTLY converting hexadecimal to octal & inverse
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 October 1st, 2011, 01:15 AM #1 Newbie   Joined: Oct 2011 Posts: 2 Thanks: 0 Ways of STRAIGHTLY converting hexadecimal to octal & inverse how can i convert octal numbers to hexadecimal numbers straightly (Means not the one we first convert to decimal and nor the one we convert to binary then to the other) just hexadecimal to octal and octal to hexadecimal ... THANK YOU!!!
 October 1st, 2011, 03:30 AM #2 Member   Joined: Apr 2010 Posts: 65 Thanks: 0 Re: Ways of STRAIGHTLY converting hexadecimal to octal & inv Code:  B1A53 // hex 0B1 | A53 // 3 digits 0 0 0 0 | 1 0 1 1 | 0 0 0 1 | 1 0 1 0 | 0 1 0 1 | 0 0 1 1 // binary | | | | | | | // 3 bits 0 2 6 1 5 1 2 3 // octal B1A53 (hex) == 2615123(oct) 3 digits hex <==> 4 digits oct tabble
 October 1st, 2011, 06:01 AM #3 Newbie   Joined: Oct 2011 Posts: 2 Thanks: 0 Re: Ways of STRAIGHTLY converting hexadecimal to octal & inv Thanks for the reply, but i was looking for other ways to convert octal to hexadecimal straightly...not octal > binary >hexa and hexa > binary > octal. Just hexa > octal and octal > hexa....May i know of anyways please?Thanks
 October 1st, 2011, 09:32 AM #4 Global Moderator     Joined: Nov 2006 From: UTC -5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms Re: Ways of STRAIGHTLY converting hexadecimal to octal & inv You can use a lookup table or calculation to make the conversion "direct" as you say, but using binary as an intermediate will be at least as fast. Generally, if you're converting from base b^x to base b^y, converting to base b^gcd(x,y) is a good first step.

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