/*
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 */
package stos;

/**
 *
 * @author Hubert
 */
public class Stos implements IStos{

private Element top;

public Stos(){
top=null;
}


    public static void main(String[] args) {
        Stos s=new Stos();
        s.push(5);s.push(4);s.push(3);
        System.out.println("Wartosc na wierzcholku: "+s.peek());
        s.print();
        System.out.println("w: "+s.pop());
         s.print();
        //s.clear();
        System.out.println(s.isEmpty());
    }

    @Override
    public void push(int i) {
        Element nowy=new Element();
        nowy.dane=i;
        nowy.next=top;
        top=nowy;
  }

    @Override
    public int pop() {
        if(isEmpty())
            return 0;

    int x=top.dane;
    top=top.next;
    return x;
    }

    @Override
    public int peek() {
        int x=top.dane;
        return x;
    }

    @Override
    public boolean isEmpty() {
        if(top==null)
            return true;
        else
            return false;
   }

    @Override
    public void print() {
        int x;
        Element pomoc=top;
        while(pomoc!=null){
           x=pomoc.dane;
        System.out.println("Wartosc: "+x);
        pomoc=pomoc.next;

        }

    }

    @Override
    public void clear() {
        while(top!=null){
        top=null;
        top=top.next;
        }
 }

}