luke-else/Algorithms-DataStructures
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Adopted new Pointer Technique -- Class deprecated

Browse Source
This commit is contained in:
Luke Else 2021-09-30 15:15:41 +01:00
parent d81f40f784
commit 814f64c95f
1 changed files with 31 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
QuickSort/QuickSort.cs
View File

@ -10,52 +10,57 @@ namespace QuickSort
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!!!
List = swap(List, ref right, ref left);
swap(ref List, ref right, ref left);
}
//Might be
List = swap(List, ref pivot, ref right);
swap(ref List, ref pivot, ref right);
}
int[] leftHalf = new int[right.Index];
for (var i = 0; i <= right.Index; i++)
int[] leftHalf = new int[right + 1];
for (var i = 0; i <= right; i++)
{
leftHalf[i] = List[i];
}
leftHalf = Sort(leftHalf);
int[] rightHalf = new int[List.Length - right.Index];
for (var i = 0; i <= right.Index; i++)
int[] rightHalf = new int[List.Length - right - 1];
for (var i = 0; i <= right; i++)
{
rightHalf[i] = List[i];
}
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++)
{
newList[i] = leftHalf[i];
}
newList[leftHalf.Length + 1] = List[right];
for (var i = 0; i < rightHalf.Length; i++)
{
newList[i + leftHalf.Length] = rightHalf[i];
@ -65,16 +70,15 @@ namespace QuickSort
}
public int[] swap(int[] List, ref Pointer pointer1, ref Pointer pointer2){
Pointer temp = pointer1;
public void swap(ref int[] List, ref int pointer1, ref int pointer2){
int temp = List[pointer1];
//Assign both the value and index
//Pointer1
List[pointer1.Index] = List[pointer2.Index];
pointer1.UpdatePointer(pointer2.Index, List);
List[pointer1] = List[pointer2];
//pointer1 = pointer2;
//Pointer2
List[pointer2.Index] = List[temp.Index];
pointer2.UpdatePointer(temp.Index, List);
return List;
List[pointer2] = temp;
//pointer2 = temp;
}
}
@ -83,14 +87,14 @@ namespace QuickSort
public int Value { get; set; }
public Pointer(int index, int[] list){
public Pointer(int index, int value){
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.Value = list[index];
this.Value = value;
}
}
}