xyz.java1

class Stack 
{
    String st[]= new String[50];
    int size,top,ctr;
    Stack()
    {
        top=-1;
        ctr=0;
    }
    Stack(int cap)
    {
        size=cap;
    }
    void pushname(String n)
    {
        if(top==size-1)
        System.out.println("OVERFLOW");
        else
        {
            top++;
            st[top]=n;
            ctr++;
        }
    }
    String popname()
    {
        String v;
        if(top==-1)
        {
            System.out.println("Underflow");
            return("");
        }
        else
        {
            v=st[top];
            top--;
            ctr--;
            return(v);
        }
    }
    void display()
    {
        if(top==-1)
        System.out.println("Underflow");
        else
        {
         for(int i=top;i>0;i--)
         System.out.println(st[i]);
         System.out.println("NUMBER OF ELEMENTS IN THE STACK \t"+ctr);
        }
    }
}