RosettaCodeData/Task/Set-consolidation/FreeBASIC/set-consolidation.basic

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Function Consolidate(s As String) As String
Dim As Integer i, j, k, p, n, pio, fin
Dim As String ts, sets(0 To 100), temp
' Split the string into substrings
pio = 1
n = 0
For i = 1 To Len(s)
If Mid(s, i, 1) = "," Then
fin = i - 1
sets(n) = Mid(s, pio, fin - pio + 1)
pio = i + 1
n += 1
End If
Next i
sets(n) = Mid(s, pio, Len(s) - pio + 1)
' Main logic
For i = 0 To n
p = i
ts = ""
For j = i To 0 Step -1
If ts = "" Then p = j
ts = ""
For k = 1 To Len(sets(p))
If j > 0 Then
If Instr(sets(j-1), Mid(sets(p), k, 1)) = 0 Then ts += Mid(sets(p), k, 1)
End If
Next k
If Len(ts) < Len(sets(p)) Then
If j > 0 Then
sets(j-1) += ts
sets(p) = "-"
ts = ""
End If
Else
p = i
End If
Next j
Next i
' Join the substrings into a string
temp = sets(0)
For i = 1 To n
temp += "," + sets(i)
Next i
Return s + " = " + temp
End Function
Dim As String test(3) = {"AB", "AB,CD", "AB,CD,DB", "HIK,AB,CD,DB,FGH"}
For t As Integer = Lbound(test) To Ubound(test)
Print Consolidate(test(t))
Next t
Sleep