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

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Procedure.s Consolidate(s.s)
Dim sets.s(100)
Define.i n, i, j, k, p
Define.s ts.s, temp.s
n = 0
For i = 1 To Len(s)
If Mid(s, i, 1) = ",":
n + 1
Else
sets(n) = sets(n) + Mid(s, i, 1)
EndIf
Next i
For i = 0 To n
p = i
ts = ""
For j = i To 0 Step -1
If ts = "":
p = j
EndIf
ts = ""
For k = 1 To Len(sets(p))
If j > 0:
If FindString(sets(j-1), Mid(sets(p), k, 1)) = 0:
ts = ts + Mid(sets(p), k, 1)
EndIf
EndIf
Next k
If Len(ts) < Len(sets(p)):
If j > 0:
sets(j-1) = sets(j-1) + ts
sets(p) = "-"
ts = ""
EndIf
Else
p = i
EndIf
Next j
Next i
temp = sets(0)
For i = 1 To n
temp = temp + "," + sets(i)
Next i
ProcedureReturn s + " = " + temp
EndProcedure
OpenConsole()
Dim test.s(3) ;= {"AB","AB,CD","AB,CD,DB","HIK,AB,CD,DB,FGH"}
test(0) = "AB"
test(1) = "AB,CD"
test(2) = "AB,CD,DB"
test(3) = "HIK,AB,CD,DB,FGH"
For t.i = 0 To 3
PrintN(Consolidate(test(t)))
Next t
PrintN(#CRLF$ + "Press ENTER to exit"): Input()
CloseConsole()