QuickSort
Recursive procedure to sort an array.
Syntax
QuickSort( vArray [, indexLow] [, indexHigh] )
Parameters
| Name |
Type |
Description |
| vArray |
Variant |
Required. The array to be sorted. |
| indexLow |
Long |
Optional. Lowest element index of the array to be sorted.
Default: -1 |
| indexHigh |
Long |
Optional. Highest element index of the arrat to be sorted.
Default: -1 |
Code
Public Sub QuickSort(vArray As Variant, _
Optional ByVal indexLow As Long = -1, _
Optional ByVal indexHigh As Long = -1)
Dim pivot As Variant
Dim tmpSwap As Variant
Dim tmpLow As Long
Dim tmpHi As Long
If indexLow = -1 Then indexLow = LBound(vArray)
If indexHigh = -1 Then indexHigh = UBound(vArray)
tmpLow = indexLow
tmpHi = indexHigh
pivot = vArray((indexLow + indexHigh) \ 2)
While (tmpLow <= tmpHi)
While (vArray(tmpLow) < pivot And tmpLow < indexHigh)
tmpLow = tmpLow + 1
Wend
While (pivot < vArray(tmpHi) And tmpHi > indexLow)
tmpHi = tmpHi - 1
Wend
If (tmpLow <= tmpHi) Then
tmpSwap = vArray(tmpLow)
vArray(tmpLow) = vArray(tmpHi)
vArray(tmpHi) = tmpSwap
tmpLow = tmpLow + 1
tmpHi = tmpHi - 1
End If
Wend
If (indexLow < tmpHi) Then QuickSort vArray, indexLow, tmpHi
If (tmpLow < indexHigh) Then QuickSort vArray, tmpLow, indexHigh
End Sub
Arraytag:Array
Remarks
- Just call this procedure with only vArray specified.