DataStructuresCSharp/C#/Datastructures/Stack/Stack.cs

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namespace C_.Datastructures.Stack
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{
public class Stack<T>
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{
internal StackNode<T>? Head { get; set; }
private int Count { get; set; } = 0;
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public static Stack<T> Create()
{
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//Create a new stack without a head
return new Stack<T>();
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}
public static Stack<T> Create(T? value)
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{
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//Create a new Stack with a head
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return new Stack<T>
{
Head = StackNode<T>.Create(value, default),
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Count = 1
};
}
public void Push(T? value)
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{
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//Add an Item to the top of the stack
Count++;
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Head = StackNode<T>.Create(value, Head);
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return;
}
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public T? Pop()
{
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//Take the item off of the top of the stack
T? value = default;
if (Count > 0)
{//Assign the default value if there are any items left in the stack
Count--;
value = Head!.Value;
Head = Head.Next;
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if (Count == 0)
{
Head = default;
}
}
return value;
}
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public T? Peek()
{
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//View item on top of the stack
if (Count > 0)
{
return Head!.Value;
}
return default;
}
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}
}