Question

我正在做一个基本的字符串练习问题，我的逻辑是这样的，但是显而易见的是，在我的情况下，我们不能像这个temp++增加一个字符串值应该是这个的解决方案：

Console.WriteLine("Input a few numbers separated by a hyphen : ");

var input = Console.ReadLine();

var split = input.Split('-');

var temp = split[0];

for (int i = 1; i < split.Length; i++)
{
    temp++;

    Console.WriteLine(temp);

    if (temp == split[i])
    {
        Console.WriteLine("Consecutive");
    }
}

Answer 1

你可以这样做：

static bool AreConsecutive(IReadOnlyList<int> numbers)
{
  for (var i = 1; i < numbers.Count; ++i)
  {
    if (numbers[i] != numbers[i - 1] + 1)
      return false;
  }
  return true;
}

然后你可以去：

Console.WriteLine("Input a few numbers separated by a hyphen : ");

var input = Console.ReadLine();

var inputParsed = input.Split('-').Select(int.Parse).ToList();

if (AreConsecutive(inputParsed))
  Console.WriteLine("Consecutive");

如果输入错误（不会解析为整数的字符），这将不会给出令人愉快的消息。

Answer 2

我强烈建议不要使用var，而右侧并没有明确表明该类型是什么。

让我用变量类型重写它，看看它是否更清楚问题是什么：

Console.WriteLine("Input a few numbers separated by a hyphen : ");

string input = Console.ReadLine();

string[] split = input.Split('-');

// Think about what type this SHOULD be
string temp = split[0];

for (int i = 1; i < split.Length; i++)
{
    // Considering the fact that temp is actually currently a string, why should this work?
    // It's pretty obvious what "1" + 2 would mean, but what would "dog" + 1 mean?
    temp++;

    Console.WriteLine(temp);

    // Consider the fact that these must be the same type to do "==" (or there must be an implicit typecast between them)
    if (temp == split[i])
    {
        Console.WriteLine("Consecutive");
    }
}

算出数字是否连续。例如，“5-6-7-8-9”，显示：“连续”;否则，显示“不连续”

2 个答案: