大家帮我看看这段代码哪里出错了？

Question

            Console.WriteLine("What is your current balance?");
            double currentBalance = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("What is your current annual interest rate(in %)?");
            double interestRate = 1 + Convert.ToDouble(Console.ReadLine()) / 100.0;
            Console.WriteLine("What balance would you like to have?");
            double targetBalance = Convert.ToDouble(Console.ReadLine());            for (int totalYears = 0; currentBalance < targetBalance; totalYears++)
            {
                currentBalance = currentBalance * interestRate;
            }            Console.WriteLine("In {0} year{1} you'll have a balance of {2}.", totalYears, totalYears == 1 ? "" : "s", targetBalance);
            Console.ReadKey();

Answer 1

totalYears, totalYears ??哪里冒出了的