//returns the most recently added string and removes it from the stack
public String Pop()
{
String popString = Peek();
//if it only stringnode
if (head == tail)
{
head = null;
tail = null;
}
else
{
StringNode nodeWalker = head;
while (nodeWalker.Next != tail)
{
nodeWalker = nodeWalker.Next;
}
//if next stringnode is tail
if (nodeWalker.Next == tail)
{
tail = nodeWalker;
nodeWalker.Next = null;
}
}
return(popString);
}
//returns the most recently added string and removes it from the stack
public String Pop()
{
String popString = Peek();
//if it only stringnode
if (head == tail)
{
head = null;
tail = null;
}
else
{
StringNode nodeWalker = head;
while (nodeWalker.Next != tail)
nodeWalker = nodeWalker.Next;
//if next stringnode is tail
if (nodeWalker.Next == tail)
{
tail = nodeWalker;
nodeWalker.Next = null;
}
}
return popString;
}
//returns the number of strings currently held in the stack
public int Count()
{
int count = 0;
StringNode nodeWalker = head;
while (nodeWalker != null)
{
count++;
nodeWalker = nodeWalker.Next;
}
return(count);
}
//returns the most recently added string but does not remove it from the stack
public String Peek()
{
StringNode peekNode = tail;
if (isEmpty() == true)
{
throw new Exception("Nothing to Peek at. Stack is empty");
}
else
{
return(peekNode.Info);
}
}
//Adds a string to the stack
public void Push(String stringToAdd)
{
//new string node to add the string node info
StringNode stringNodeToAdd = new StringNode(stringToAdd);
//find where to add new node to
if (isEmpty())
{
head = stringNodeToAdd;
tail = stringNodeToAdd;
}
else
{
tail.Next = stringNodeToAdd;
tail = stringNodeToAdd;
}
}
public Stack()
{
head = null;
tail = null;
}
//Adds a string to the stack
public void Push(String stringToAdd)
{
//new string node to add the string node info
StringNode stringNodeToAdd = new StringNode(stringToAdd);
//find where to add new node to
if (isEmpty())
{
head = stringNodeToAdd;
tail = stringNodeToAdd;
}
else
{
tail.Next = stringNodeToAdd;
tail = stringNodeToAdd;
}
}
public Stack()
{
head = null;
tail = null;
}
public StringNode(String info)
{
Info = info;
Next = null;
}