C#选择法排序实例分析

public int[] SelectionSort(int[] arr)
{
  //1. Find min
  //2. Swap it with first element
  //3. Repeat starting from secong position onwards.
  int _min = 0;
  for (int i = 0; i < arr.Length; i++)
  {
    _min = i;
    for (int j = i; j < arr.Length; j++)
    {
      if (arr[j] < arr[_min])
        _min = j;
    }
    int _temp = arr[i];
    arr[i] = arr[_min];
    arr[_min] = _temp;
  }
  return arr;
}