Paul Smith <phhs80 <at> gmail.com> writes:
>
> Dear All,
>
> The following code should return 1, but it returns 0:
>
> source("http://r-bc.googlecode.com/svn/trunk/R/bc.R";)
> bc("9 % 2")
>
> Do you confirm this bug?
>
It's not a bug in r-bc, it's a misfeature (?) in bc.
It has to do with the 'scale' parameter in bc (which gets
set to 100 explicitly by r-bc, but would be set to 20 in any
case by the use of the '-l' option to bc)
http://superuser.com/questions/31445/gnu-bc-modulo-with-scale-other-than-0
http://en.wikipedia.org/wiki/Bc_programming_language
http://www.linuxquestions.org/questions/programming-9/bc-using-l-messes-up-modulus-331003/
a workaround;
> source("http://r-bc.googlecode.com/svn/trunk/R/bc.R";)
> bc("scale=0; 9%2")
[1] "1"
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