Initial data commit

Task/Stack/VBA/stack-2.vba

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+'stack test
+Public Sub stacktest()
+  Dim aStack As New Stack
+  With aStack
+    'push and pop some value
+    .Push 45
+    .Push 123.45
+    .Pop
+    .Push "a string"
+    .Push "another string"
+    .Pop
+    .Push Cos(0.75)
+    Debug.Print "stack size is "; .Size
+    While Not .IsEmpty
+      Debug.Print "pop: "; .Pop
+    Wend
+    Debug.Print "stack size is "; .Size
+    'try to continue popping
+    .Pop
+  End With
+End Sub