XX面试题

是一题笔试题，也没有什么难点，当时写这道题的时候太唐突了，

今天回来再机子上重新完善完善了

题面：请打印以下图形

   *

  ***

 *****

*******

 *****

  ***

   *

 

class Program
    {
        private const string flag = "*";
        private const char snull = ' ';
        private const int length = 7;

        /// <summary>
        /// 主函数
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {
            //----------正向打印
            for (int i = 0; i <= length; i++)
                if (i % 2 != 0)
                    PrintFlag(i);

            //-----------反向打印
            for (int i = length - 2; i > 0; i--)
                if (i % 2 != 0)
                    PrintFlag(i);

            Console.Read();
        }

        /// <summary>
        /// 打印标记
        /// </summary>
        /// <param name="currentIndex">当前索引</param>
        static void PrintFlag(int currentIndex)
        {
            string t = string.Empty, s = string.Empty;
            for (int i = 0; i < currentIndex; i++)
            {
                t += flag;
            }
            s = GetLocation(currentIndex, t);//获取字符串及所在位置
            Console.WriteLine(s);
        }

        /// <summary>
        /// 获取“标记”位置
        /// </summary>
        /// <param name="currentIndex">当前索引</param>
        /// <param name="flag">标记</param>
        /// <returns></returns>
        static string GetLocation(int currentIndex, string flag)
        {
            int totalcount = length;
            if (currentIndex == totalcount)
                return flag;

            int startlocation = (totalcount - currentIndex) / 2;//中间位置
            string temp = flag.PadLeft(startlocation + currentIndex, snull);//前置空白
            temp = temp.PadRight(totalcount, snull);//后置空白
            return temp;
        }
    }

 

 

 

 

如果有更好的方法，希望大家多补充哈