使用while将字符串分成两个单词

Question

string givenstring,outputString="";
int i, j = 0;
Console.WriteLine("Enter the string");
givenstring = Console.ReadLine();
i = (givenstring.Length) / 2;

while (j < i)
{
    outputString += givenstring[j];
    j++;
}

Console.WriteLine(outputString);
outputString = string.Empty;

while (i < givenstring.Length)
{
    outputString += givenstring[i];
    i++;
}
Console.WriteLine(outputString);

在这里,我将字符串分成两个字符串.例如,输入:

你好,世界

输出:

你好,世界.

但现在我需要输出:

dlrow olleH

Answer 1

问题很模糊.如果您需要以相反的顺序将所有单词放在字符串中,例如

"这是一个测试字符串" - >"String test a is this"

那么你可以做到

  String source = "This is a test string";

  String result = String.Join(" ", source
    .Split(' ')
    .Reverse()
    .Select((item, index) => index > 0 ? item.ToLower() : ToNameCase(item)));

  // "String test a is this"
  Console.WriteLine(result);

这ToNameCase()是这样的:

  private static String ToNameCase(String source) {
    if (String.IsNullOrEmpty(source))
      return source;

    StringBuilder sb = new StringBuilder(source.Length);

    sb.Append(Char.ToUpper(source[0]));
    sb.Append(source.Substring(1));

    return sb.ToString();
  }

编辑:如果你不注意案例,即

"这是一个测试字符串" - >"字符串测试a是这个"

你可以简化解决方案

  String source = "This is a test string";

  String result = String.Join(" ", source
    .Split(' ')
    .Reverse());

  // "string test a is This"
  Console.WriteLine(result);

编辑2:如果要将文本拆分为长度相等的range块(可能除了最后一个块),然后反转它们:

  String source = "HelloWorld";
  int range = 2; // we want 2 chunks ("Hello" and "World")

  String result = String.Join(" ", Enumerable
    .Range(0, range)
    .Select(index => index == range - 1 ?
        source.Substring(source.Length / range * index) :
        source.Substring(source.Length / range * index, source.Length / range))
    .Reverse()); // remove ".Reverse()" and you will get "Hello World"

  // "World Hello"
  Console.WriteLine(result);