OpenEuphoria

Re: Computer Language Shootout

• Posted by Jason Gade <jaygade at yahoo.com> Jan 08, 2007
• 752 views

I fixed the partial-sums example. There were a few errors and I changed the meat
of the program to match the FreeBASIC version. Multiplications should be faster
than powers.

I get the proper output but I haven't tested timing yet.

-- partial-sums benchmark (for the Great Programming Shootout)
-- By András Szabó 2007 and Matt Lewis
-- This code is public domain code. You may reuse, redistribute or modify it
-- however you wish.
--
-- about the partial-sums benchmark
-- diff program output N = 25000 with this output file to check your program is 
-- correct before contributing.
-- (Programs may use a single-loop or several-loops; programs may cache
recomputed
-- values in local variables)
-- Each program should use the same naive iterative double-precision algorithms
to
-- calculate partial-sums of the series.

without trace
without warning
without profile

include get.e

sequence argv
object N

argv = command_line()

if length(argv) > 2 then
    N = value(argv[3])
    N = N[2]
else
    N = 0
end if

atom res1, res2, res3, res4, res5, res6, res7, res8, res9
res1 = 0.0
res2 = 0.0
res3 = 0.0
res4 = 0.0
res5 = 0.0
res6 = 0.0
res7 = 0.0
res8 = 0.0
res9 = 0.0

atom temp
atom k2, k3, ksin, kcos, alt
constant tt = 2/3
alt = 1.0

for k=1 to N by 1 do
    k2 = k * k
    k3 = k2 * k
    ksin = sin(k)
    kcos = cos(k)

    res1 += power(tt, k-1)
    res2 += power(k, -0.5)
    res3 += 1 / (k * (k + 1))
    res4 += 1 / (k3 * ksin * ksin)
    res5 += 1 / (k3 * kcos * kcos)
    res6 += 1 / k
    res7 += 1 / k2
    res8 += alt / k
    res9 += alt / (2 * k - 1)
    alt *= -1
    
end for

printf(1,"%.9f\t(2/3)^k",res1)
printf(1,"\n%.9f\tk^-0.5",res2)
printf(1,"\n%.9f\t1/k(k+1)",res3)
printf(1,"\n%.9f\tFlint Hills",res4)
printf(1,"\n%.9f\tCookson Hills",res5)
printf(1,"\n%.9f\tHarmonic",res6)
printf(1,"\n%.9f\tRiemann Zeta",res7)
printf(1,"\n%.9f\tAlternating Harmonic",res8)
printf(1,"\n%.9f\tGregory",res9)

--
"Any programming problem can be solved by adding a level of indirection."
--anonymous
"Any performance problem can be solved by removing a level of indirection."
--M. Haertel
"Premature optimization is the root of all evil in programming."
--C.A.R. Hoare
j.