Data commit

Task/Knapsack-problem-0-1/Visual-Basic/knapsack-problem-0-1.vb

@@ -0,0 +1,68 @@
+'Knapsack problem/0-1 - 12/02/2017
+Option Explicit
+Const maxWeight = 400
+Dim DataList As Variant
+Dim xList(64, 3) As Variant
+Dim nItems As Integer
+Dim s  As String, xss As String
+Dim xwei As Integer, xval As Integer, nn As Integer
+
+Private Sub Form_Load()
+    Dim i As Integer, j As Integer
+    DataList = Array("map", 9, 150, "compass", 13, 35, "water", 153, 200, "sandwich", 50, 160, _
+           "glucose", 15, 60, "tin", 68, 45, "banana", 27, 60, "apple", 39, 40, _
+           "cheese", 23, 30, "beer", 52, 10, "suntan cream", 11, 70, "camera", 32, 30, _
+           "T-shirt", 24, 15, "trousers", 48, 10, "umbrella", 73, 40, "book", 30, 10, _
+           "waterproof trousers", 42, 70, "waterproof overclothes", 43, 75, _
+           "note-case", 22, 80, "sunglasses", 7, 20, "towel", 18, 12, "socks", 4, 50)
+    nItems = (UBound(DataList) + 1) / 3
+    j = 0
+    For i = 1 To nItems
+        xList(i, 1) = DataList(j)
+        xList(i, 2) = DataList(j + 1)
+        xList(i, 3) = DataList(j + 2)
+        j = j + 3
+    Next i
+    For i = 1 To nItems
+        xListBox.AddItem xList(i, 1)
+    Next i
+End Sub
+
+Private Sub cmdOK_Click()
+    Dim i As Integer, j As Integer
+    For i = 1 To xListBox.ListCount
+        xListBox.RemoveItem 0
+    Next i
+    s = ""
+    For i = 1 To nItems
+        s = s & Chr(i)
+    Next
+    nn = 0
+    Call ChoiceBin(1, "")
+    For i = 1 To Len(xss)
+        j = Asc(Mid(xss, i, 1))
+        xListBox.AddItem xList(j, 1)
+    Next i
+    xListBox.AddItem "*Total* " & xwei & " " & xval
+End Sub
+
+Private Sub ChoiceBin(n As String, ss As String)
+    Dim r As String
+    Dim i As Integer, j As Integer, iwei As Integer, ival As Integer
+    Dim ipct As Integer
+    If n = Len(s) + 1 Then
+        iwei = 0: ival = 0
+        For i = 1 To Len(ss)
+            j = Asc(Mid(ss, i, 1))
+            iwei = iwei + xList(j, 2)
+            ival = ival + xList(j, 3)
+        Next
+        If iwei <= maxWeight And ival > xval Then
+            xss = ss: xwei = iwei: xval = ival
+        End If
+    Else
+        r = Mid(s, n, 1)
+        Call ChoiceBin(n + 1, ss & r)
+        Call ChoiceBin(n + 1, ss)
+    End If
+End Sub 'ChoiceBin