C# - 该名称在当前上下文中不存在

Question

我这周开始学习 C#，但在完成这项作业时遇到了麻烦。
他们让我们买的那本昂贵的书并没有很好地解释这一点。
我们必须在这个作业中使用 If、Else、While 和 Do。

我收到此错误，名称“answer”在当前上下文中不存在。
我做错了什么？

int question = 25;

do
{
    Console.Write("Guess the number: ");
    string strAnswer = Console.ReadLine();
    int answer = Convert.ToInt32(strAnswer);

    if (answer < question)
    {
        Console.WriteLine("Too low, guess again. ");
    }
    else if (answer > question)
    {
        Console.WriteLine("Too high, guess again. ");
    }
}

while (answer != question);
Console.Write("Correct!");

Answer 1

试试这个，在不同的范围定义答案，你需要在更高的范围定义它，

 int question = 25;
 int answer = 0;
 do
 {
     Console.Write("Guess the number: ");
     string strAnswer = Console.ReadLine();
     answer = Convert.ToInt32(strAnswer);

     if (answer < question)
     {
         Console.WriteLine("Too low, guess again. ");
     }
     else if (answer > question)
     {
         Console.WriteLine("Too high, guess again. ");
     }
  }

  while (answer != question);
     Console.Write("Correct!");