using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(SumOfEuros(0.1f, 1000));

        Console.WriteLine(SumOfEuros(0.1, 1000));

        Console.WriteLine(SumOfEuros(0.1m, 1000));

        Console.WriteLine("");

​

        Console.WriteLine(Program.ConvertDecimalToBinary(151));

        Console.WriteLine(Program.ConvertDecimalToBinary(12));

        Console.WriteLine();

        Console.WriteLine(Program.ConvertBinaryToDecimal("1111010110011110"));

        Console.WriteLine(Program.ConvertDecimalToBinary(62878));

        Console.WriteLine(Program.ConvertDecimalToHexadecimal(133));

    }

    //2.

    //Convert the number 1111010110011110(2) to hexadecimal and decimal

    //numeral systems.

    public static string ConvertDecimalToHexadecimal(int num)

    {

        string result = "";

        while(num>0)

        {

            result+=num%16+":";

            num = num/16;

        }

        string[] strArr = result.Split(':');

        /*foreach(string x in strArr)

        {

            Console.Write(x+"---");

        }*/

        Console.WriteLine(strArr.Length);

        //-1 because arr has one empty element at the end

        for(int i = 0; i<strArr.Length-1;i++)

        {

            int temp;

            bool done = int.TryParse(strArr[i], out temp);

            //Console.WriteLine(done);

            if(temp>9)

            {

                strArr[i] = Program.ConvertNumberToHex(strArr[i]);

            }

        }

        foreach(string x in strArr)

        {

            Console.Write(x+" ");

        }

        Console.WriteLine(result);

        return result;

    }

    public static string ConvertNumberToHex(string str)

    {

        switch(str)

        {

            case "10":

                return "A";

            case "11":

                return "B";

            case "12":

                return "C";

            case "13":

                return "D";

            case "14":

                return "E";

            case "15":

                return "F";

            default:

                return null;

        }

    }

    public static long ConvertBinaryToDecimal(string bin)

    {

        long result = 0;

        char[] charArr = bin.ToCharArray();

        long[] intArr = new long[charArr.Length];

        Console.WriteLine(intArr.Length);

        for(int i = 0; i< charArr.Length; i++)

        {

            intArr[i] = (long)Char.GetNumericValue(charArr[i]);

            //Console.WriteLine(intArr[i]+"-----------"+i);

        }

        Console.WriteLine();

        Array.Reverse(intArr);

        for(int i = intArr.Length-1;i>=0;i--)

        {

            result+= intArr[i]*(long)Math.Pow(2,i);

        }

        return result;

    }

    //1.

    //Convert the numbers 151, 35, 43, 251, 1023 and 1024 to the binary

    //numeral system.

    public static string ConvertDecimalToBinary(int num)

    {

        string result = "";

        while(num>0)

        {

            result+= num%2;

            num = num/2;

        }

        char[] charArray = result.ToCharArray();

        Array.Reverse(charArray);

        /*foreach(char x in charArray)

        {

            Console.Write(x);

        }

        result = charArray.ToString();

        Console.WriteLine(result);*/

        return new string(charArray);

    }

​

    public static float SumOfEuros(float num, int counter)

    {

        float result = 0f;

        for(int i = 0; i<counter; i++)

        {

            result += num;

            //Console.WriteLine(result);

        }

        return result;

    }

    public static decimal SumOfEuros(decimal num, int counter)

    {

        decimal result = 0m;

        for(int i = 0; i<counter; i++)

        {

            result += num;

            //Console.WriteLine(result);

        }

        return result;

    }

    public static double SumOfEuros(double num, int counter)

    {

        double result = 0;

        for(int i = 0; i<counter; i++)

        {

            result += num;

            //Console.WriteLine(result);

        }

        return result;

    }

}