using System;

public class Program

{

    public static void Main()

    {

        // Hannah García Verdeja

        string n;

        int c;

        double fr=0, nr=0, lr=0, s, av;

        Console.WriteLine("Hi! I will help you to calculate your average. What´s your name?");

        n = (Console.ReadLine());

        Console.WriteLine("Nice to meet you, " + n + "!. How many clases do you have?");

        c = int.Parse(Console.ReadLine());

        for (int i = 1; i <= c; i++)

            {

             if ( i == 1)

             {

                 Console.WriteLine("Please write the result of the first class");

          fr =+ double.Parse(Console.ReadLine());

                 if ( fr <= 69)

                 {

                     Console.WriteLine("Sorry, you failed"); 

                 }

                 else

                 {

                     Console.WriteLine("Good, you passed"); 

            }

        }

            else if ( i == c)

            {

                 Console.WriteLine("Please write the result of the last class");

          lr =+ double.Parse(Console.ReadLine());

                 if ( lr <= 69)

                 {

                     Console.WriteLine("Sorry, you failed"); 

                 }

                 else

                 {

                     Console.WriteLine("Good, you passed"); 

            }

        }

            else

               {

                Console.WriteLine("Please write the result of the next class");

          nr =+ double.Parse(Console.ReadLine());

                 if ( nr <= 69)

                 {

                     Console.WriteLine("Sorry, you failed"); 

                 }

                 else

                 {

                      Console.WriteLine("Good, you passed"); 

            }

        }

​

    }

        s = fr + nr + lr;

        av = s / c ;

             Console.WriteLine("Your average is: " + av); 

}

}

​