How to sort a number array??

[kevin shen]

I have an array with unsorted different number? How to sort this array with increased order??

Thanks!


Best Regards,

Kevin Shen

[cksiow]

try htpp://vblib.virtualave.net, there is some sorting function in vbSort of the activeX DLL.


HTH

cksiow
http://vblib.virtualave.net - share our codes

[Cakkie]

You can use the bubble sort method, which loops through the array until it is sorted the way you want. This however take very long whit large arrays.

Sorted = false
Dim tmpSwap
Do Until Sorted = true
Sorted = true
for t=0 to UBound(someArray) - 1
If someArray(t) > someArray(t+1) then
tmpSwap = someArray(t)
someArray(t) = someArray(t+1)
someArray(t+1) = tmpSwap
Sorted = false
End If
next t
Loop



What it does is to loop through the array, check two elements, and if the elements aren't in the right sort order, swap them. If there was no swapping in the entire loop (for loop), it means that the array is sorted, so he wont do it again.

Tom Cannaerts
[email protected]

Programming today is a race between software engineers striving to build bigger and better idot-proof programs, and the universe trying to produce bigger and better idiots. So far, the universe is winning -- Rich Cook

[Iouri]

' QuickSort an array of any type
' QuickSort is especially convenient with large arrays (>1,000
' items) that contains items in random order. Its performance
' quickly degrades if the array is already almost sorted. (There are
' variations of the QuickSort algorithm that work good with
' nearly-sorted arrays, though, but this routine doesn't use them.)
'
' NUMELS is the index of the last item to be sorted, and is
' useful if the array is only partially filled.
'
' Works with any kind of array, except UDTs and fixed-length
' strings, and including objects if your are sorting on their
' default property. string are sorted in case-sensitive mode.
'
' You can write faster procedures if you modify the first two lines
' to account for a specific data type, eg.
' Sub QuickSortS(arr() as Single, optional numEls as Variant,
' ' optional descending as Boolean)
' Dim value as Single, temp as Single

Sub QuickSort(arr as Variant, optional numEls as Variant, _
optional descending as Boolean)

Dim value as Variant, temp as Variant
Dim sp as Integer
Dim leftStk(32) as Long, rightStk(32) as Long
Dim leftNdx as Long, rightNdx as Long
Dim i as Long, j as Long

' account for optional arguments
If IsMissing(numEls) then numEls = UBound(arr)
' init pointers
leftNdx = LBound(arr)
rightNdx = numEls
' init stack
sp = 1
leftStk(sp) = leftNdx
rightStk(sp) = rightNdx

Do
If rightNdx > leftNdx then
value = arr(rightNdx)
i = leftNdx - 1
j = rightNdx
' find the pivot item
If descending then
Do
Do: i = i + 1: Loop Until arr(i) <= value
Do: j = j - 1: Loop Until j = leftNdx Or arr(j) >= value
temp = arr(i)
arr(i) = arr(j)
arr(j) = temp
Loop Until j <= i
else
Do
Do: i = i + 1: Loop Until arr(i) >= value
Do: j = j - 1: Loop Until j = leftNdx Or arr(j) <= value
temp = arr(i)
arr(i) = arr(j)
arr(j) = temp
Loop Until j <= i
End If
' swap found items
temp = arr(j)
arr(j) = arr(i)
arr(i) = arr(rightNdx)
arr(rightNdx) = temp
' push on the stack the pair of pointers that differ most
sp = sp + 1
If (i - leftNdx) > (rightNdx - i) then
leftStk(sp) = leftNdx
rightStk(sp) = i - 1
leftNdx = i + 1
else
leftStk(sp) = i + 1
rightStk(sp) = rightNdx
rightNdx = i - 1
End If
else
' pop a new pair of pointers off the stacks
leftNdx = leftStk(sp)
rightNdx = rightStk(sp)
sp = sp - 1
If sp = 0 then Exit Do
End If
Loop
End Sub




Iouri Boutchkine
[email protected]