public static void Sort(IComparable[] a, int lo, int hi)
{
if (hi <= lo + 10)
{
Insertion.Sort(a, lo, hi);
return;
}
int lt = lo, gt = hi;
IComparable v = a[lo];
int i = lo;
while (i <= gt)
{
int cmp = a[i].CompareTo(v);
if (cmp < 0)
{
Exchange(a, lt++, i++);
}
else if (cmp > 0)
{
Exchange(a, i, gt--);
}
else
{
i++;
}
}
Sort(a, lo, lt - 1);
Sort(a, gt + 1, hi);
}
private void Select(int input)
{
switch (input)
{
case 1:
sortData = Bubble.Sort(sortData);
break;
case 2:
sortData = Insertion.Sort(sortData);
break;
case 3:
sortData = Selection.Sort(sortData);
break;
case 4:
sortData = Heap.Sort(sortData);
break;
case 5:
sortData = Quick.Sort(sortData, 0, sortData.Length - 1);
break;
case 6: sortData = Merge.Sort(sortData);
break;
default:
Console.WriteLine("Wrong input");
break;
}
PrintResults();
}
private void QuickMedThree(List <int> list, int start, int end)
{
const int cutoff = 10;//point at which we switch to insertion sort.
if (start + cutoff > end)
{
Insertion.InsertionSortS(list, start, end);
}
else
{
int middle = (start + end) / 2; //find median of three for pivot
if (list[middle] < list[start]) // by sorting them and pivot is
{ // in the middle position
Swap(list, start, middle);
NumSwaps++;
}
if (list[end] < list[start])
{
Swap(list, start, end);
NumSwaps++;
}
if (list[end] < list[middle])
{
Swap(list, middle, end);
NumSwaps++;
}
//place pivot at position(end-1) since we know that array[end] >= array[middle]
int pivot = list[middle];
Swap(list, middle, end - 1);
NumSwaps++;
//begin partitioning
int left, right;
for (left = start, right = end - 1; ;)
{
while (list[++left] < pivot)
{
;
}
while (pivot < list[--right])
{
;
}
if (left < right)
{
Swap(list, left, right);
NumSwaps++;
}
else
{
break;
}
}
//restore pivot
Swap(list, left, end - 1);
QuickMedThree(list, start, left - 1); //recursively sort left subset
QuickMedThree(list, left + 1, end); //recursively sort right subset
}
}
public static void Sort(IComparable[] a, int lo, int hi)
{
//if (hi <= lo) return; Improve..
if (hi <= lo + 10)
{
Insertion.Sort(a, lo, hi);
return;
}
int j = Partition(a, lo, hi);
Sort(a, lo, j - 1);
Sort(a, j + 1, hi);
}
private static void Sort(IComparable[] a, IComparable[] aux, int lo, int hi)
{
//if (hi <= lo) { return; } improve..
if (hi <= lo + 7)
{
Insertion.Sort(a, lo, hi);
return;
}
int mid = lo + (hi - lo) / 2;
Sort(a, aux, lo, mid);
Sort(a, aux, mid + 1, hi);
if (!Less(a[mid + 1], a[mid]))
{
return;
}
Merge(a, aux, lo, mid, hi);
}
static void Main(string[] args)
{
Console.WriteLine("SORTING ALGORITHMS");
int[] array = new int[10] {
100, 50, 20, 40, 10, 60, 80, 70, 90, 30
};
DateTime start;
Console.WriteLine("The real array: [{0}]\n", string.Join(", ", array));
//bubble
int[] test1 = new int[array.Length];
Array.Copy(array, test1, array.Length);
start = DateTime.Now;
Console.WriteLine("\tBubble sort: [{0}] in {1}s", string.Join(", ", Bubble.Sort(test1)), (DateTime.Now - start).TotalSeconds);
//selection
int[] test2 = new int[array.Length];
Array.Copy(array, test2, array.Length);
start = DateTime.Now;
Console.WriteLine("\tSelection sort: [{0}] in {1}s", string.Join(", ", Selection.Sort(test2)), (DateTime.Now - start).TotalSeconds);
//insetrtion
int[] test3 = new int[array.Length];
Array.Copy(array, test3, array.Length);
start = DateTime.Now;
Console.WriteLine("\tInsertion sort: [{0}] in {1}s", string.Join(", ", Insertion.Sort(test3)), (DateTime.Now - start).TotalSeconds);
//merge
int[] test4 = new int[array.Length];
Array.Copy(array, test4, array.Length);
start = DateTime.Now;
Console.WriteLine("\tMerge sort: [{0}] in {1}s", string.Join(", ", Merge.Sort(test4)), (DateTime.Now - start).TotalSeconds);
//quick
int[] test5 = new int[array.Length];
Array.Copy(array, test5, array.Length);
start = DateTime.Now;
Console.WriteLine("\tQuick sort: [{0}] in {1}s", string.Join(", ", Quick.Sort(test5)), (DateTime.Now - start).TotalSeconds);
Console.WriteLine("\nThe real array: [{0}]", string.Join(", ", array));
}
private static void Main()
{
var selection = 0;
while (selection != -1)
{
var arr = new List <int>(new[]
{
4, 5, 2, 1, 3, 7, 6, 22, 23, 25, 27, 29, 8, 9, 10, 32, 31, 43, 54, 43, 42, 12, 34, 38, 37, 36, 19,
18, 11, 55, 57, 56, 59, 13
});
Console.Clear();
Console.WriteLine("0. Unsorted\n1. Bubble\n2. Insertion\n3. Selection\n4. Heap\n5. Radix\n6. Quick\n7. Shell\n8. Merge\n9. Tim\n10. Cocktail");
Console.Write("Your Choice : ");
selection = int.Parse(Console.ReadLine() ?? throw new InvalidOperationException());
var s = "";
switch (selection)
{
case 0:
s = "Unsorted";
break;
case 1:
arr = Bubble <int> .Sort(arr);
s = "Bubble";
break;
case 2:
arr = Insertion <int> .Sort(arr);
s = "Insertion";
break;
case 3:
arr = Selection <int> .Sort(arr);
s = "Selection";
break;
case 4:
arr = Heap <int> .Sort(arr);
s = "Heap";
break;
case 5:
arr = Radix.Sort(arr);
s = "Radix";
break;
case 6:
arr = Quick <int> .Sort(arr);
s = "Quick";
break;
case 7:
arr = Shell <int> .Sort(arr);
s = "Shell";
break;
case 8:
arr = Merge <int> .Sort(arr);
s = "Merge";
break;
case 9:
arr = Tim <int> .Sort(arr);
s = "Tim";
break;
case 10:
arr = Cocktail <int> .Sort(arr);
s = "Cocktail";
break;
default:
Console.WriteLine("Choice Wrong");
break;
}
Console.Clear();
Console.WriteLine(s + " Sort");
foreach (var i in arr)
{
Console.Write(i + " ");
}
Console.ReadKey();
}
}
