RosettaCodeData/Task/Remove-duplicate-elements/FreeBASIC/remove-duplicate-elements.f...

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' FB 1.05.0 Win64
Sub removeDuplicates(a() As Integer, b() As Integer)
Dim lb As Integer = LBound(a)
Dim ub As Integer = UBound(a)
If ub = -1 Then Return '' empty array
Redim b(lb To ub)
b(lb) = a(lb)
Dim count As Integer = 1
Dim unique As Boolean
For i As Integer = lb + 1 To ub
unique = True
For j As Integer = lb to i - 1
If a(i) = a(j) Then
unique = False
Exit For
End If
Next j
If unique Then
b(lb + count) = a(i)
count += 1
End If
Next i
If count > 0 Then Redim Preserve b(lb To lb + count - 1)
End Sub
Dim a(1 To 10) As Integer = {1, 2, 1, 4, 5, 2, 15, 1, 3, 4}
Dim b() As Integer
removeDuplicates a(), b()
For i As Integer = LBound(b) To UBound(b)
Print b(i); " ";
Next
Print
Print "Press any key to quit"
Sleep