Console.WriteLine("请输入要打印的行数：");             int n = Convert.ToInt32(Console.ReadLine());             Console.Clear(); //清除以上显示的内容             string row = "";             //这层循环控制打印的行数             for (int i = 1; i <= n; i++)             {                 //这层循环控制每行前面打印*的个数                 for (int j = 1; j <= 2 * i - 1; j++)                 {                     // Console.Write("*");                     row += "*";                 }                 //每打印完一行换一下行                 //设置打印出来的*居中显示                 Console.SetCursorPosition((Console.WindowWidth - row.Length) / 2, i);                 Console.WriteLine(row);                 row = "";             }