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// Stack.h for Ex9_21
// A generic pushdown stack

generic ref
<h4 align=right text=red> Stack</h4><hr>
   class Stack
{
private:
  // Defines items to store in the stack
  ref struct Item
  {
    T Obj;                        // Handle for the object in this item
    Item^ Next;                   // Handle for next item in the stack or nullptr

    // Constructor
    Item(T obj, Item^ next): Obj(obj), Next(next){}
  };
<hr>


  Item^ Top;                      // Handle for item that is at the top

public:
  // Push an object on to the stack
  void Push(T obj)
  {
    Top = gcnew Item(obj, Top);   // Create new item and make it the top
  }

  // Pop an  object off the stack
  T Pop()
  {  
    if(Top == nullptr)            // If the stack is empty
      return T();                 // return null equivalent

    T obj = Top->Obj;             // Get object from item
    Top = Top->Next;              // Make next item the top 
    return obj;
  }
};
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<hr> <style type="text/css"> div.mainnavigate { margin: 20px 2px; /* background-color: #ffffff; */ border: 1px solid black; } </style> <div class=xnavigate> [] <black>readme</black> course(s) preface <black>I</black> 1 2 <black>II</black> 3 4 <black>III</black> 5 6 7 <black>IV</black> 8 9 10 <black>V</black> 11 12 afterthought(s) <black>appendix</black> reference(s) example(s) <black>resource(s)</black> _ </div> <hr>

(C) Æliens 20/2/2008

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