Merge remote-tracking branch 'upstream/master'

1 files changed, 43 insertions, 0 deletions

diff --git a/challenge-109/abigail/lua/ch-1.lua b/challenge-109/abigail/lua/ch-1.lua
new file mode 100644
index 0000000000..74c3b7d914
--- /dev/null
+++ b/challenge-109/abigail/lua/ch-1.lua
@@ -0,0 +1,43 @@
+#!/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