Insertion Sort

1. 直接插入排序算法：

 

        /// <summary>
        /// 插入排序
        /// </summary>
        /// <param name="data"></param>
        public static void InsertionSort(int[] data)
        {
            if (data == null || data.Length < 1)
            {
                throw new ArgumentNullException("data");
            }

            int temp, index;
            for (int i = 1; i < data.Length; i++)
            {
                temp = data[i];
                index = i;

                while (index > 0 && temp < data[index - 1])
                {
                    data[index] = data[--index];
                }
                data[index] = temp;
            }
        }

 

2. 折半插入排序：

 

        /// <summary>
        /// 折半插入排序
        /// </summary>
        /// <param name="data"></param>
        public static void Bin_InsertionSort(int[] data)
        {
            if (data == null || data.Length < 1)
            {
                throw new ArgumentNullException("data");
            }

            int low, mid, high;
            for (int i = 1; i < data.Length; i++)
            {
                // 折半查找
                low = 0;
                high = i - 1;
                while (low <= high)
                {
                    mid = (low + high) / 2;
                    if (data[i] < data[mid])
                    {
                        high = mid - 1;
                    }
                    else
                    {
                        if (data[i] > data[mid])
                        {
                            low = mid + 1;
                        }
                        else
                        {
                            low = mid;
                            break;
                        }
                    }                    
                }

                // 移动元素
                int temp = data[i];
                for (int j = i; j > low; j--)
                {
                    data[j] = data[j - 1];
                }
                data[low] = temp;
            }
        }