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Adopted new Pointer Technique -- Class deprecated

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Luke Else 2021-09-30 15:15:41 +01:00
parent d81f40f784
commit 814f64c95f
1 changed files with 31 additions and 27 deletions
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58
QuickSort/QuickSort.cs
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@ -10,52 +10,57 @@ namespace QuickSort
public int[] Sort(int[] List){ public int[] Sort(int[] List){
Pointer pivot = new Pointer(0, List); if(List.Length <= 1) return List;
Pointer left = new Pointer(1, List); int pivot = 0;
Pointer right = new Pointer(List.Length-1, List); int left = 1;
while (right.Index >= left.Index) int right = List.Length - 1;
while (right >= left)
{ {
while (left.Index <= right.Index && left.Value <= pivot.Value) while (left <= right && List[left] <= pivot)
{ {
left.UpdatePointer(left.Index + 1, List); left++;
} }
while (right.Index >= left.Index & right.Value >= pivot.Value) while (right >= left && List[right] >= List[pivot])
{ {
right.UpdatePointer(right.Index - 1, List); right--;
} }
if (right.Index > left.Index) if (right > left)
{ {
//Swap the values of the pointers as well!!! //Swap the values of the pointers as well!!!
List = swap(List, ref right, ref left); swap(ref List, ref right, ref left);
} }
//Might be //Might be
List = swap(List, ref pivot, ref right); swap(ref List, ref pivot, ref right);
} }
int[] leftHalf = new int[right.Index]; int[] leftHalf = new int[right + 1];
for (var i = 0; i <= right.Index; i++) for (var i = 0; i <= right; i++)
{ {
leftHalf[i] = List[i]; leftHalf[i] = List[i];
} }
leftHalf = Sort(leftHalf); leftHalf = Sort(leftHalf);
int[] rightHalf = new int[List.Length - right.Index]; int[] rightHalf = new int[List.Length - right - 1];
for (var i = 0; i <= right.Index; i++) for (var i = 0; i <= right; i++)
{ {
rightHalf[i] = List[i]; rightHalf[i] = List[i];
} }
rightHalf = Sort(rightHalf); rightHalf = Sort(rightHalf);
int[] newList = new int[leftHalf.Length + rightHalf.Length]; int[] newList = new int[/*leftHalf.Length + rightHalf.Length*/ List.Length];
for (var i = 0; i < leftHalf.Length; i++) for (var i = 0; i < leftHalf.Length; i++)
{ {
newList[i] = leftHalf[i]; newList[i] = leftHalf[i];
} }
newList[leftHalf.Length + 1] = List[right];
for (var i = 0; i < rightHalf.Length; i++) for (var i = 0; i < rightHalf.Length; i++)
{ {
newList[i + leftHalf.Length] = rightHalf[i]; newList[i + leftHalf.Length] = rightHalf[i];
@ -65,16 +70,15 @@ namespace QuickSort
} }
public int[] swap(int[] List, ref Pointer pointer1, ref Pointer pointer2){ public void swap(ref int[] List, ref int pointer1, ref int pointer2){
Pointer temp = pointer1; int temp = List[pointer1];
//Assign both the value and index //Assign both the value and index
//Pointer1 //Pointer1
List[pointer1.Index] = List[pointer2.Index]; List[pointer1] = List[pointer2];
pointer1.UpdatePointer(pointer2.Index, List); //pointer1 = pointer2;
//Pointer2 //Pointer2
List[pointer2.Index] = List[temp.Index]; List[pointer2] = temp;
pointer2.UpdatePointer(temp.Index, List); //pointer2 = temp;
return List;
} }
} }
@ -83,14 +87,14 @@ namespace QuickSort
public int Value { get; set; } public int Value { get; set; }
public Pointer(int index, int[] list){ public Pointer(int index, int value){
this.Index = index; this.Index = index;
this.Value = list[index]; this.Value = value;
} }
public void UpdatePointer(int index, int[] list){ public void UpdatePointer(int index, int value){
this.Index = index; this.Index = index;
this.Value = list[index]; this.Value = value;
} }
} }
} }