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authorShinya Sato <shinnya.sato@gmail.com>2022-04-16 20:30:04 +0900
committerShinya Sato <shinnya.sato@gmail.com>2022-04-16 20:30:04 +0900
commitc8ff868327e19cd156573a723214d66119a71b41 (patch)
tree2b959f5d9e2ec4b9f520b0259307a781102ffea7 /comparison/OCaml/qsort800000.ml
parent353b47702094b20d207acf97e1638d2befb4da11 (diff)
parent5139486fd68973703b8a68b118eff2ef78def144 (diff)
downloadinpla-c8ff868327e19cd156573a723214d66119a71b41.tar.gz
inpla-c8ff868327e19cd156573a723214d66119a71b41.zip
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+let rec split pivot (alist : int list) =
+ match alist with
+ [] -> ([], [])
+ | (x::xs) ->
+ let (below, above) = split pivot xs in
+ if x<pivot then (x::below, above)
+ else (below, x::above) ;;
+
+let rec qsort (alist : int list) =
+ match alist with
+ [] -> []
+ | pivot::rest ->
+ let (below, above) = split pivot rest
+ in (qsort below) @ [pivot] @ (qsort above) ;;
+
+
+
+
+let rec mkRandList n =
+ match n with
+ 0 -> []
+ | n -> (Random.int 10000)::(mkRandList (n-1)) ;;
+
+let main = qsort (mkRandList 800000) ;;
+
+(*
+The following error arises:
+
+Stack overflow during evaluation (looping recursion?).
+*)