package pruebapilas;
import java.io.*;

public class Main {

public static void main(String[] args) throws IOException 
{
    InputStreamReader isr = new InputStreamReader(System.in);
    BufferedReader br = new BufferedReader(isr);
    
    int max=5;
    int pila[] = new int[max];
    int tope;
    int opc;
    int dato;
    
    tope=0;
    
    do 
    {
        opc=0;
    System.out.println("\n\n<<< PILAS >>>");
        System.out.println("1.-Push");
        System.out.println("2.-Pop");
        System.out.println("3.-Mostrar Pila");
        System.out.println("0.-Salir");
              
        System.out.print("Opcion? ---> ");
        opc = Integer.parseInt (br.readLine());
                
              
        if ( opc == 1)
        {    
            if (tope == max)
            {
                System.out.println("Pila llena !!!");
            }
            else
                {
                    dato=0;
                    System.out.println("\n\n<<< Adicionar >>>");
                    System.out.print("\nAnote el dato que desea insertar ---> ");
                    dato = Integer.parseInt (br.readLine());
             
                    pila[tope]=dato;
                    tope++;                    
                }
        }       
        
        if ( opc == 2)
        {    
            if (tope == 0)
            {
                System.out.println("Pila Vacia !!!");
            }
            else
                {
                    pila[tope-1]=0;
            tope--;
            System.out.println("Dato eliminado !!!");
                }
        }       
        
        if ( opc == 3)
        {    
            if (tope == 0)
            {
                System.out.println("Pila Vacia !!!");
            }
                
                System.out.println("\n\n<<< MOSTRAR LA PILA >>>");
        for(int i=0;i<tope;i++)
                    System.out.println("pila["+i+"]="+pila[i]);
                System.out.println("tope="+tope);  
        System.out.println("maximo="+max);
        }
    } while(opc!=0);
 }
}