stack.h

class node
{
	int data;
	node *next;
};

class Stack
{
	private:
		node *front;  // points to the head of list

	public:
		// initialization
		Stack()
		{
			front = NULL;
		}
		// push method to add data element
		void push(int);
		// pop method to remove data element
		void pop();
		// top method to return top data element
		int top();
};