using System;

using System.Collections.Generic;

​

/**

 * @author AbdallahMohammed

 */

public class Program

{

    public static void Main()

    {

        var operators = new Dictionary<string, Func<int, int, int>> {

            {"+", (x, y) => x + y},

            {"-", (x, y) => x - y},

            {"*", (x, y) => x * y},

            {"/", (x, y) => x / y}

        };

​

        int num1 = Ask<int>("Enter first number:");

        int num2 = Ask<int>("Enter second number:");

        foreach (string symbol in operators.Keys) {

            var func = operators[symbol];

            int result = func(num1, num2);

            Console.WriteLine("{0}{1}{2}={3}", num1, symbol, num2, result);

        }

    }

    protected static T Ask<T>(string question)

    {

        Console.WriteLine(question);        

        return (T) Convert.ChangeType(Console.ReadLine(), typeof(T));

    }

}