1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
#!/opt/local/bin/lua
--
-- See ../README.md
--
--
-- Run as: lua ch-1.lua [plain | compute]
--
local PLAIN = 0
local COMPUTE = 1
local COUNT = 20
function divisor_sum (n)
local sum = 0
for i = 2, n / 2 do
if n % i == 0
then sum = sum + i
end
end
return (sum)
end
local type = PLAIN
if #arg >= 1 and arg [1] == "compute"
then type = COMPUTE
end
if type == PLAIN
then print ("0, 0, 0, 2, 0, 5, 0, 6, 3, 7, 0, 15, 0, 9, 8, 14, 0, 20, 0, 21")
end
if type == COMPUTE
then for n = 1, COUNT do
if n > 1
then io . write (", ")
end
io . write (divisor_sum (n))
end
io . write ("\n")
end
|
