// val contains your given value
int val = 14.3413543485;

// we declare a string that contains the truncated value
string decimal_adjusted = val.ToString ( "N2" );

using System;

class Program
{
    static void Main(string[] args)
    {
        Console.Write("Enter the number:");
        int Num = Convert.ToInt32(Console.ReadLine());
        string NumInString = Num.ToString();
        int OddSum = 0, EvenSum = 0;

        for (int i = 0; i < NumInString.Length; i++)
        {
            int Digit = Convert.ToInt32(NumInString.Substring(i, 1));
            if (i % 2 != 0)
                EvenSum += Digit;
            else
                OddSum += Digit;
        }

        Console.WriteLine("Odd Sum = {0} Even Sum = {1}", OddSum, EvenSum);
        Console.Read();

    }
}