/*
 * Created by SharpDevelop.
 * User: Fl4sh3r
 * Date: 18.09.2017
 * Time: 23:24
 *
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;

namespace qqq
{
	class Program
	{
	public static void Main(string[] args)
	{
		String opakovani = ("y");
		while(opakovani == ("y"))
		{
			float vysledek = 0;
			Console.WriteLine("Vyber: \n1 - scitani \n2 - odcitani\n3 - nasobeni\n4 - deleni");
			String moznost = Console.ReadLine();
			int moznostint = Int32.Parse(moznost);



			if (moznostint==1)
			{
				Console.WriteLine("kolik cisel chces scitat?");
				String pocet = Console.ReadLine();
				int pocet2 = Int32.Parse(pocet);
				Console.WriteLine("Zadej cisla");
				while (pocet2 > 0)
				{
					String cislo = Console.ReadLine();
					float cislo2 = float.Parse(cislo);

					vysledek = vysledek + cislo2;
					pocet2--;
				}
			}

			else if (moznostint == 2)
			{
				Console.WriteLine("Kolik cisel chces odcitat?");
				String pocet = Console.ReadLine();
				int pocet2 = Int32.Parse(pocet);
				pocet2--;
				Console.WriteLine("Zadej cisla");
				String f = Console.ReadLine();
				float ff = float.Parse(f);
				vysledek = ff;
				while (pocet2 > 0)
				{
					String cislo = Console.ReadLine();
					float cislo2 = float.Parse(cislo);
					vysledek = vysledek - cislo2;
					pocet2--;
				}
			}

			else if (moznostint == 3)
			{
				Console.WriteLine("Kolik cisel chces nasobit?");
				String pocet = Console.ReadLine();
				int pocet2 = Int32.Parse(pocet);
				Console.WriteLine("Zadej cisla");
				String predcislo = Console.ReadLine();
				float predcislo2 = float.Parse(predcislo);
				pocet2--;
				vysledek = predcislo2;
				while(pocet2>0)
				{
					String cislo = Console.ReadLine();
					float cislo2 = float.Parse(cislo);
					vysledek = vysledek * cislo2;
					pocet2--;
				}
			}

			else if(moznostint == 4)
			{
				Console.WriteLine("kolik cisel chces delit?");
				String pocet = Console.ReadLine();
				float pocet2 = float.Parse(pocet);
				Console.WriteLine("Zadej cisla");
				String predcislo = Console.ReadLine();
				float predcislo2 = float.Parse(predcislo);
				vysledek = predcislo2;
				pocet2--;
				while(pocet2>0)
				{
					String cislo = Console.ReadLine();
					float cislo2 = float.Parse(cislo);
					vysledek = vysledek / cislo2;
					pocet2--;
				}
			}

			else
			{
				Console.WriteLine("Spatna volba");
				String konecc = "a";
				while(konecc == "a")
				{
					Console.WriteLine("chces pouzit kalkulacku znovu? y/n");
					opakovani = Console.ReadLine();
					if (opakovani == "y" || opakovani == "n")
					{
						konecc = "b";
					}
				}
			}

			Console.WriteLine("Vysledek je: " + vysledek);
			String konec = "a";
			while(konec == "a")
			{
				Console.WriteLine("chces pouzit kalkulacku znovu? y/n");
				opakovani = Console.ReadLine();
				if (opakovani == "y" || opakovani == "n")
				{
					konec = "b";
				}
			}
		}
	}
	}
}