by M Abdul Samad (1 Submission)
Category: Math/Dates
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Sun 9th June 2002
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Quick Sort
API Declarations
' Just copy paste the code in your application. The following function will
'sort The array passed as argument e.g QuickSort Array
VBcoders
Sub QuickSort(Value(), Optional iFrom = -1, Optional iTo = -1)
Dim N As Integer
If iFrom = -1 Then iFrom = 0
If iTo = -1 Then iTo = UBound(Value) - 1
Dim L As Integer, R As Integer
L = iFrom
R = iTo
If Abs(L - R) < 1 Or L >= R Then Exit Sub
Do While (Abs(L - R) >= 1)
For I = iFrom + 1 To iTo
If Value(L) <= Value(R) Then
L = L + 1
Swap Value(L), Value(R)
Exit For
End If
Next
For I = iFrom + 1 To iTo
If (Value(L) < Value(R)) Then
R = R - 1
Else
Swap Value(L), Value(R)
Exit For
End If
Next
Loop
QuickSort Value, iFrom, L - 1
QuickSort Value, L + 1, iTo
End Sub
Sub Swap(ByRef A, ByRef B)
Dim Temp
Temp = A
A = B
B = Temp
End Sub