On 01/-10/-28163 02:59 PM, harrismh777 wrote:
Cameron Simpson wrote:
| folks are not aware that 'bc' also has arbitrary precision floating
| point math and a standard math library.
Floating point math? I thought, historically at least, that bc is built
on dc (arbitrary precision integer math, reverse polish syntax) and that
consequently bc uses fixed point math rather than floating point.
My bad... I don't mean under-the-covers... I mean that the user may
calculate arbitrary precision floating arithmetic ... bc keeps track of
the decimal point and displays the number of digits the user specifies;
arbitrary precision calculator. (loose language, sorry)
On a *nix system, Mac OSx, Linux, run this to get 1000+ digits of PI:
time echo "scale = 1010; 16 * a(1/5) - 4 * a(1/239)" |bc -lq
scale sets the precision, -lq loads the math library arctan() quiet.
Wouldn't it be shorter to say:
time echo "scale = 1010; 4 * a(1)" |bc -lq
DaveA
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