diff options
Diffstat (limited to 'sources/examples/sort.scala')
-rw-r--r-- | sources/examples/sort.scala | 53 |
1 files changed, 34 insertions, 19 deletions
diff --git a/sources/examples/sort.scala b/sources/examples/sort.scala index 36d91b72ae..661ae0a414 100644 --- a/sources/examples/sort.scala +++ b/sources/examples/sort.scala @@ -1,27 +1,42 @@ -module sorter { +object sorter { -def sort(a: Array[Int]): Unit = { + def sort(a: Array[Int]): Unit = { - def swap(i: Int, j: Int): Unit = { - val t = a(i); a(i) = a(j); a(j) = t; - } + def swap(i: Int, j: Int): Unit = { + val t = a(i); a(i) = a(j); a(j) = t; + } - def sort1(l: Int, r: Int): Unit = { - val pivot = a((l + r) / 2); - var i = l, j = r; - while (i <= j) { - while (a(i) < pivot) { i = i + 1 } - while (a(j) > pivot) { j = j - 1 } - if (i <= j) { - swap(i, j); - i = i + 1; - j = j - 1; + def sort1(l: Int, r: Int): Unit = { + val pivot = a((l + r) / 2); + var i = l, j = r; + while (i <= j) { + while (a(i) < pivot) { i = i + 1 } + while (a(j) > pivot) { j = j - 1 } + if (i <= j) { + swap(i, j); + i = i + 1; + j = j - 1; + } } + if (l < j) sort1(l, j); + if (j < r) sort1(i, r); } - if (l < j) sort1(l, j); - if (j < r) sort1(i, r); + + sort1(0, a.length - 1); + } + + def println(ar: Array[Int]) = { + def iter(i: Int): String = + ar(i) + (if (i < ar.length-1) "," + iter(i+1) else "]"); + Console.println("[" + iter(0)); + } + + def main(args: Array[String]) = { + val xs = List(6, 2, 8, 5, 1); + val ar = xs.copyToArray(new Array[Int](xs.length), 0); + println(ar); + sort(ar); + println(ar); } - sort1(0, a.length - 1); -} }
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