梯数得分循环

{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                int sum = 0;
                for (int i = 1; i <= 100; i++)
                {
                    if (i == 70)
                    {
                        Console.WriteLine("跌倒了");
                    }
              
                    if (i<= 49)
                    {
                        sum = sum + i;
                        Console.WriteLine("您"+i+"层的得分为"+sum);
                      
                    }
                    else if (i > 49 && a <= 100)
                    {
                        sum = sum + 10;
                        Console.WriteLine(("您"+i+"层的得分为"+sum));
                    }
                    else
                    {
                        Console.WriteLine("出错");
                    }
                    Thread.Sleep(1000);//延时一秒
                }
              
 
                Console.ReadLine();