using System;

public class Exercise4

{

    public static void Main()

    {

        int x, y;

        char operation;

        Console.Write("Input first number: ");

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

        Console.Write("Input operation: ");

        operation = Convert.ToChar(Console.ReadLine());

        Console.Write("Input second number: ");

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

        if (operation=='+')

            Console.WriteLine("{0} + {1} = {2}", x, y, x+y);

        else if (operation=='-')

            Console.WriteLine("{0} - {1} = {2}", x, y, x-y);

        else if ((operation=='x') || (operation=='*'))

            Console.WriteLine("{0} * {1} = {2}", x, y, x*y);

        else if (operation=='/')

            Console.WriteLine("{0} / {1} = {2}", x, y, x/y);

        else

            Console.WriteLine("Wrong Character");

        Console.WriteLine("\nBy: Edgar Ulises Salazar Zumaya");

    }

}

​