using System;
 
namespace asd
{
  class Program
  {
    static void Main(string[] args)
    {
      bool error = true;
      double sugar = 0;
 
      Console.WriteLine("Kör kerület és terület számító.");
 
      while (error) {
	    Console.Write("Add meg a kör sugarát: ");
        try {
          sugar = Convert.ToDouble(Console.ReadLine());
          error = false;
        }
        catch (FormatException) {
          Console.WriteLine("Valós számot adjon meg!");
        }
      }
 
      Console.WriteLine("Kör sugara: {0}", sugar);
 
      var kerulet = Math.PI * 2 * sugar;
      var terulet = Math.Pow(sugar, 2) * Math.PI;
 
      Console.WriteLine("A kör kerülete: {0}", kerulet);
      Console.WriteLine("A kör területe: {0}", terulet);
 
      Console.ReadLine();
    }
  }
}

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

c3VnYXIKNDUuLjMyCmFsbWEKLXN6aWx2YQoxMAo=

sugar
45..32
alma
-szilva
10