using System;

namespace Articulos.Cap04.TiposNullables
{
    public sealed class LiftingOperadores
    {
        public static void Main()
        {
            // Declaración de variables nullable:
            int? x = 13;
            int? y = null;
            
            // Ejemplos con operadores de igualdad:
            Console.WriteLine ("\n--- Ejemplos de Operadores de Igualdad ---\n");
            Console.WriteLine ("\tx == y -> {0:3}", (x == y));            // False
            Console.WriteLine ("\tx == null -> {0}", (x == null));        // False
            Console.WriteLine ("\tx == 13 -> {0}", (x == 13));            // True
            Console.WriteLine ("\ty == null -> {0}", (y == null));        // True
            Console.WriteLine ("\ty == 13 -> {0}", (y == 13));            // False
            Console.WriteLine ("\ty != 13 -> {0}", (y != 13));            // True
            
            Console.WriteLine ("\n--- Ejemplos de Operadores Relacionales ---\n");
            Console.WriteLine ("\tx < 17 -> {0}", (x < 17));            // True
            Console.WriteLine ("\ty < 17 -> {0}", (y < 17));            // False
            Console.WriteLine ("\ty > 17 -> {0}", (y > 17));            // False
            
            Console.WriteLine ("\n--- Ejemplos de Otros Operadores ---\n");
            Console.WriteLine ("\tx + 13 -> {0}", (x + 13));            // 26
            Console.WriteLine ("\tx + y -> {0}", (x + y));                // null (no imprime nada)
            
            Console.WriteLine ();
        }
    }
}