数组剔除重复元素

 

public static int[] DeleteSame(int[] old)
        {
            int temp = 0;
            int[] result = null;
            if (old != null && old.Length > 0)
            {
                temp = old[0];
                for (int i = 0; i < old.Length - 1; i++)
                {
                    for (int j = i + 1; j < old.Length; j++)
                    {
                        if (old[j] == temp) continue;
                        if (old[j] == old[i]) old[j] = temp;
                    }
                }
                int n = 1;
                for (int i = 0; i < old.Length; i++)
                {
                    if (old[i] != temp) n++;
                }

                result = new int[n];
                n = 1;
                result[0] = temp;
                for (int i = 1; i < old.Length; i++)
                {
                    if (old[i] != temp) result[n++] = old[i];
                }
            }

            return result;
        }