TwoNumbersDigitSums

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TwoNumbersDigitSums
{
    class Program
    {
        static void Main(string[] args)
        {
            int num1Total = 0, num2Total = 0, num1=0, num2=0;
            bool wrongInput = true, num1NotOver = true, num2NotOver = true;
            while (wrongInput)
            {
                num1 = int.Parse(Console.ReadLine());
                num2 = int.Parse(Console.ReadLine());
                if (num2 > num1)
                    wrongInput = false;
                else
                    Console.WriteLine("ERROR! Second number must be bigger than first!");

            }
            int num1ForCalcs = num1;
            int num2ForCalcs = num2;
            while (num1NotOver)
            {
                num1Total += num1ForCalcs % 10;
                num1ForCalcs /= 10;
                if (num1ForCalcs == 0)
                    num1NotOver=false;
            }
            while (num2NotOver)
            {
                num2Total += num2ForCalcs % 10;
                num2ForCalcs /= 10;
                if (num2ForCalcs == 0)
                    num2NotOver = false;
            }
            Console.WriteLine("First number digits sum: {0}. Second number digits sum: {1}", num1Total, num2Total);
            if (num1Total > num2Total)
                Console.WriteLine(num1 +"'s digits sum is greater.");
            else if (num1Total < num2Total)
                Console.WriteLine(num2 +"'s digits sum is greater.");
            else
                Console.WriteLine("Numbers' digits' sum is equal!");
            Console.ReadLine();
        }
    }
}