using System;

public class Program

{

    public static void Main()

    {

        //Declaracion

        int c1,c2,c3,c4;

            double prom;

        Console.WriteLine("Practica 1");

        //Solicitar

        Console.WriteLine("Introduce la calificacion 1");

        //Leer

        c1=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Introduce la calificacion 2");

        c2=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("introduce la calificacion 3");

        c3=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("introduce la calificacion 4");

        c4=Convert.ToInt32(Console.ReadLine());

        //Calcular

        prom=(c1+c2+c3+c4)/3;

        //Selector si el promedio mayor que 8 o igual

        if (prom>8)

        {

            Console.WriteLine("Aprobado");

        }

        else

        {

        Console.WriteLine("Rebrobado");

        }

    }

}

​