Does bc support hex calculations?












18















I'm trying to do a hex calculation directly with bc, I already specified the scale.



echo 'scale=16;c06b1000-c06a5e78' | bc


But I still get a zero. What could be wrong?










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  • While not technically an answer to your question, you might want to consider moo(1) instead of bc(1).

    – user24323
    Oct 6 '12 at 2:09


















18















I'm trying to do a hex calculation directly with bc, I already specified the scale.



echo 'scale=16;c06b1000-c06a5e78' | bc


But I still get a zero. What could be wrong?










share|improve this question

























  • While not technically an answer to your question, you might want to consider moo(1) instead of bc(1).

    – user24323
    Oct 6 '12 at 2:09
















18












18








18


6






I'm trying to do a hex calculation directly with bc, I already specified the scale.



echo 'scale=16;c06b1000-c06a5e78' | bc


But I still get a zero. What could be wrong?










share|improve this question
















I'm trying to do a hex calculation directly with bc, I already specified the scale.



echo 'scale=16;c06b1000-c06a5e78' | bc


But I still get a zero. What could be wrong?







bc calculator






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share|improve this question













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edited Sep 5 '14 at 13:13









terdon

129k32253428




129k32253428










asked Oct 4 '12 at 6:55









daisydaisy

28.5k49169302




28.5k49169302













  • While not technically an answer to your question, you might want to consider moo(1) instead of bc(1).

    – user24323
    Oct 6 '12 at 2:09





















  • While not technically an answer to your question, you might want to consider moo(1) instead of bc(1).

    – user24323
    Oct 6 '12 at 2:09



















While not technically an answer to your question, you might want to consider moo(1) instead of bc(1).

– user24323
Oct 6 '12 at 2:09







While not technically an answer to your question, you might want to consider moo(1) instead of bc(1).

– user24323
Oct 6 '12 at 2:09












1 Answer
1






active

oldest

votes


















28














echo 'ibase=16;C06D1000-C06A5E78' | bc
176520


Note that only UPPER CASE hex digits are supported as lower case ones would conflict with function and variable names, which is why you got 0 in your example (var1 - var2)



If you need the answer in hex too, just set the obase variable:



echo 'obase=16;ibase=16;C06D1000-C06A5E78' | bc
2B188


PS: FYI scale isn't designed for conversion base. From man bc:



scale defines how some operations use digits after the decimal point.
The default value of scale is 0.





share|improve this answer


























  • So the real answer on 'what could be wrong' is that bc only supports UPPER CASE for the hex digits, with credits to editor Stephane.

    – Roland
    Jan 10 at 10:23











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1 Answer
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1 Answer
1






active

oldest

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active

oldest

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active

oldest

votes









28














echo 'ibase=16;C06D1000-C06A5E78' | bc
176520


Note that only UPPER CASE hex digits are supported as lower case ones would conflict with function and variable names, which is why you got 0 in your example (var1 - var2)



If you need the answer in hex too, just set the obase variable:



echo 'obase=16;ibase=16;C06D1000-C06A5E78' | bc
2B188


PS: FYI scale isn't designed for conversion base. From man bc:



scale defines how some operations use digits after the decimal point.
The default value of scale is 0.





share|improve this answer


























  • So the real answer on 'what could be wrong' is that bc only supports UPPER CASE for the hex digits, with credits to editor Stephane.

    – Roland
    Jan 10 at 10:23
















28














echo 'ibase=16;C06D1000-C06A5E78' | bc
176520


Note that only UPPER CASE hex digits are supported as lower case ones would conflict with function and variable names, which is why you got 0 in your example (var1 - var2)



If you need the answer in hex too, just set the obase variable:



echo 'obase=16;ibase=16;C06D1000-C06A5E78' | bc
2B188


PS: FYI scale isn't designed for conversion base. From man bc:



scale defines how some operations use digits after the decimal point.
The default value of scale is 0.





share|improve this answer


























  • So the real answer on 'what could be wrong' is that bc only supports UPPER CASE for the hex digits, with credits to editor Stephane.

    – Roland
    Jan 10 at 10:23














28












28








28







echo 'ibase=16;C06D1000-C06A5E78' | bc
176520


Note that only UPPER CASE hex digits are supported as lower case ones would conflict with function and variable names, which is why you got 0 in your example (var1 - var2)



If you need the answer in hex too, just set the obase variable:



echo 'obase=16;ibase=16;C06D1000-C06A5E78' | bc
2B188


PS: FYI scale isn't designed for conversion base. From man bc:



scale defines how some operations use digits after the decimal point.
The default value of scale is 0.





share|improve this answer















echo 'ibase=16;C06D1000-C06A5E78' | bc
176520


Note that only UPPER CASE hex digits are supported as lower case ones would conflict with function and variable names, which is why you got 0 in your example (var1 - var2)



If you need the answer in hex too, just set the obase variable:



echo 'obase=16;ibase=16;C06D1000-C06A5E78' | bc
2B188


PS: FYI scale isn't designed for conversion base. From man bc:



scale defines how some operations use digits after the decimal point.
The default value of scale is 0.






share|improve this answer














share|improve this answer



share|improve this answer








edited Jan 10 at 14:45









Roland

1105




1105










answered Oct 4 '12 at 7:07









rushrush

19.1k46395




19.1k46395













  • So the real answer on 'what could be wrong' is that bc only supports UPPER CASE for the hex digits, with credits to editor Stephane.

    – Roland
    Jan 10 at 10:23



















  • So the real answer on 'what could be wrong' is that bc only supports UPPER CASE for the hex digits, with credits to editor Stephane.

    – Roland
    Jan 10 at 10:23

















So the real answer on 'what could be wrong' is that bc only supports UPPER CASE for the hex digits, with credits to editor Stephane.

– Roland
Jan 10 at 10:23





So the real answer on 'what could be wrong' is that bc only supports UPPER CASE for the hex digits, with credits to editor Stephane.

– Roland
Jan 10 at 10:23


















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