blob: 212029d2bc0c661fd5538e8aab93ca2d8d6af859 (
plain) (
blame)
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
|
fun quicksort nil = nil
| quicksort (pivot :: rest) =
let
fun split(nil) = (nil,nil)
| split(x :: xs) =
let
val (below, above) = split(xs)
in
if x < pivot then (x :: below, above)
else (below, x :: above)
end;
val (below, above) = split(rest)
in
quicksort below @ [pivot] @ quicksort above
end;
(* Creates a random list *)
local
val nextInt = Random.randRange(1,10000);
val r = Random.rand(1,1);
in
fun mkRandList 0 = []
| mkRandList n = (nextInt r)::(mkRandList (n-1))
end;
(* Validation checks *)
fun validation [] = true
| validation (x::xs) =
let fun validation_cons x [] = true
| validation_cons x (y::ys) =
if x<=y then validation_cons y ys
else false
in
validation_cons x xs
end;
(* Main *)
validation(quicksort(mkRandList 800000));
|
