Question

我试图在C＃中捕获1到100之间的数字，我想循环用户，直到他们输入正确的结果。我有以下内容，但它没有像我期望的那样进行评估，我的知识差距在哪里？

var input=0;

Console.Write("Enter a number between 1 and 100: ");

while (!int.TryParse(Console.ReadLine(), out input) && input>0 && input <=100)
{
    Console.Write("The value must be a number greater than 0, but less than 100 please try again: ");
}

Answer 1

您似乎缺少一对括号，!int.TryParse(Console.ReadLine(), out input)被评估，如果用户输入任何内容，则为false。

尝试：

var input=0;

Console.Write("Enter a number between 1 and 100: ");

while (!(int.TryParse(Console.ReadLine(), out input) && input>0 && input <=100))
{
    Console.Write("The value must be a number greater than 0, but less than 100 please try again: ");
}

Answer 2

 static void Main(string[] args)
    {
        var input = 0;
        Console.Write("Enter a number between 1 and 100: ");
        while (true)
        {
          if (int.TryParse(Console.ReadLine(), out input) && (input < 0 || input > 100))
            {
                Console.Write("The value must be a number greater than 0, but less than 100 please try again: ");
            }
            else
            {
                Console.WriteLine("Thank you for the correct input");
                break;
            }
        }
        Console.ReadKey();        

    }

捕获1-100之间的整数

2 个答案: