OperatorsExpressionsAndStatements - Task 6

using System;
/*
*Write a program that takes as input a four-digit number in format abcd (e.g. 2011) and performs the following:
* Calculates the sum of the digits (in our example 2+0+1+1 = 4).
* Prints on the console the number in reversed order: dcba (in our example 1102).
* Puts the last digit in the first position: dabc (in our example 1201).
* Exchanges the second and the third digits: acbd (in our example 2101).
* The number has always exactly 4 digits and cannot start with 0
*/
class FourDigitsNumber
{
     static void Main()
    {

        short number = Convert.ToInt16(Console.ReadLine());
        short digitA = Convert.ToInt16( number % 10);
        short digitB = Convert.ToInt16((number / 10) % 10);
        short digitC = Convert.ToInt16((number / 100) % 10);
        short digitD = Convert.ToInt16( number / 1000);
        short exchangeSecondAndThird = Convert.ToInt16(digitD * 1000 + digitB * 100 + digitC * 10 + digitA);
        short digitsSum = Convert.ToInt16(digitA + digitB + digitC + digitD);
        short reverseNumber;
        short lastDigitInFront;
        Console.Clear();
        Console.WriteLine("\n\n-------------------------------------------------------------------------------");
        Console.WriteLine("| number | sum of digits | reversed | last digit in front | exch second-third |");
        if (digitA == 0)
        {
            if (digitsSum > 10)
            {
                Console.WriteLine("|  {0}  |       {1}      | last is 0|      last is 0      |       {2}        |", number, digitsSum, exchangeSecondAndThird);

            }
            else
            {
                Console.WriteLine("|  {0}  |       {1}       | last is 0|      last is 0      |       {2}        |", number, digitsSum, exchangeSecondAndThird);
            }
        }
        else
        {
            reverseNumber = Convert.ToInt16((digitD + digitC * 10 + digitB * 100 + digitA * 1000));
            lastDigitInFront = Convert.ToInt16((digitA * 1000 + digitD * 100 + digitC * 10 + digitB));
            if (digitsSum < 10)
            {
                Console.WriteLine("|  {0}  |       {1}       |   {2}   |         {3}        |        {4}       |", number, digitsSum, reverseNumber, lastDigitInFront, exchangeSecondAndThird);
            }
            else
            {
                Console.WriteLine("|  {0}  |       {1}      |   {2}   |         {3}        |        {4}       |", number, digitsSum, reverseNumber, lastDigitInFront, exchangeSecondAndThird);
            }
            Console.WriteLine("-------------------------------------------------------------------------------");
        }
        Console.Read();
    }
}