using System;

​

namespace Calculator

{

    class Program

    {

        static void Main(string[] args)

        {

            float a, b, c, z ;

​

            Console.WriteLine("Welcome ....");

            Console.Write("what's your first number ? : ");

            a = float.Parse(Console.ReadLine());

​

            Console.Write("what's your second number ? : ");

            b = float.Parse(Console.ReadLine());

            Console.Write("what's your third number ? : ");

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

            float max =a ;

​

            if (b > max )

                max = b ;

             if (c > max )

                max = c ;

            Console.WriteLine("the max number is :{0} ", max);

​

            float min =a ;

​

            if (b < min )

                min = b ;

             if (c < min )

                min = c ;

            Console.WriteLine("the min number is :{0} ", min);

​

            z=(a+b+c) / 2;

            Console.WriteLine("the avr number is :{0} ", z);

            z = float.Parse(Console.ReadLine());

            Console.WriteLine("Thanks :)");

        }

    }

}

​