C＃代码到数组中的左移位元素 [英] C# code to left shift elements in an array

问题描述

hi team，

我有一个数组低于元素和索引的数组

arr [5] =       a，d，e，f，g

index         0,1,2,3,4

I have an array with below element and index
arr[5] =      a, d, e, f, g
index         0, 1, 2, 3, 4

对于给定src和目标位置我想移动元素

Ex：srcpos = 1，targetpos = 4 ，位置1的元素（srcpos）现在被移动到trgpos（4）并且e，f，g被左移#B $ b我需要使用for循环来实现相同的结果。

结果数组将

For a give src and target postion i want to move the elements
Ex: srcpos = 1, targetpos = 4, element at position 1(srcpos) is now moved to trgpos(4) and e,f,g got left shifted
I need to use for loop to achieve the same.
Result array will be

res [5] =     a，e，f，g，d
$
index         0,1,2,3,4

res[5] =     a, e, f, g, d
index         0, 1, 2, 3, 4

任何人都可以共享相同的代码段。            ; 

Can anyone share code snippet for the same.            

推荐答案

嗨！

请尝试以下代码

  class Program {

    static void Main(string[] args) {

      char[] arr = new char[] { 'a', 'd', 'e', 'f', 'g' };

      Print(arr);
      Shift(arr, 1, 4);
      Console.WriteLine();
      Print(arr);

      Console.ReadKey();
    }

    public static void Print(char[] array) {

      foreach (var c in array)
        Console.Write(c);
    }

      public static void Shift(char[] array, int src, int dst) {

      if (src == dst)
        return;

      if (src < dst) {
        var target = src + 1;
        var temporaryItem = array[target];
        array[target] = array[src];
        array[src] = temporaryItem;
        src = target;
      }
      if (src > dst) {
        var target = src - 1;
        var temporaryItem = array[target];
        array[target] = array[src];
        array[src] = temporaryItem;
        src = target;
      }

      Shift(array, src, dst);
    }
  }

老实说，使用List代替数组要容易得多：

Honestly, it is much more easy to work with List instead of array:

      var list = new List<char> { 'a', 'd', 'e', 'f', 'g' };
      var sourceIndex = 1;
      var targetIndex = 4;
      var soruceItem = list[1];
      list.RemoveAt(sourceIndex);
      list.Insert(targetIndex, soruceItem);

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