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如何在 C# 的控制台应用程序中分隔一组数字，而不是向用户询问每个单独的数字？例如，而不是这样做......

        double first, second, third, fourth;

        Console.Write("Please enter first digit: ");
        first = Convert.ToDouble(Console.ReadLine());
        Console.Write("Please enter second digit: ");
        second = Convert.ToDouble(Console.ReadLine());
        Console.Write("Please enter third digit: ");
        third = Convert.ToDouble(Console.ReadLine());
        Console.Write("Please enter fourth digit: ");
        fourth = Convert.ToDouble(Console.ReadLine());
4

3 回答 3

5

您可以让他们使用某种分隔符（本例中的空格）一次输入所有数字。

Console.Write("Please enter a bunch of digits separated by a space: ");
var allDigits = Console.ReadLine().Split(' ');
Double[] digits = allDigits.Select(d => Covert.ToDouble(d)).ToArray();

如果您的要求仅限于4 inputs限制allDigit使用IEnumerable<string>.Take(4)

Console.Write("Please enter a bunch of digits separated by a space: ");
var allDigits = Console.ReadLine().Split(' ').Take(4);
Double[] digits = allDigits.Select(d => Covert.ToDouble(d)).ToArray();
于 2013-02-22T04:12:01.250 回答
2

利用array，它可以帮助您更快地对变量进行读/写操作

    double[] numbers = new double[4];

    for (int i = 0; i < 4; i++)
    {
        Console.WriteLine("Enter {0} of 4 Number : ", i + 1);
        numbers[i] = Convert.ToDouble(Console.ReadLine());
    }

    // numbers[0] = first
    // numbers[1] = second
    // numbers[2] = third
    // numbers[3] = fourth

如果您真的想使用四个变量，那么这可能是最简单的方法：

    double first, second, third, fourth;

    for (int i = 1; i <= 4; i++)
    {
        Console.WriteLine("Enter a number : ");
        double input = Convert.ToDouble(Console.ReadLine());
        switch (i)
        {

            case 1:
                first = input;
                break;

            case 2:
                second = input;
                break;

            case 3:
                third = input;
                break;
            case 4:
                fourth = input;
                break;

        }
    }
于 2013-02-22T04:11:18.820 回答
1

这是一种方法：

Console.Write("Please enter numbers, comma-separated: ");
var numbers = Console.ReadLine()
    .Split(',')
    .Select(x => Double.Parse(x.Trim()))
    .ToList();

TryParse尽管在现实生活中的代码中使用并将错误返回给用户可能会更好。

于 2013-02-22T04:12:14.993 回答