I vote for bc (or dc, or what else), because it is standard UNIX, unlike Xcal AND it is easy to script. Here is a rounding function in ksh, try scripting it with xcal instead of bc, here is just the core of it:
Code:
# calculate rounded value
nValue=$( print "scale=$iDigits; $( print "scale=$iDigit2; $nValue + $nAdd" |\
bc \
) / 1" | \
bc \
)
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