using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace 打印正三角
{
    class Program
    {
        static void Main(string[] args)
        {

            Console.WriteLine("請輸入要打印的行數：");
            int n=Convert.ToInt32(Console.ReadLine());
            Console.Clear(); //清除以上顯示的內容

            //這層循環控制打印的行數
            for (int i = 1; i <= n; i++) 
            {
                //這層循環控制每行前面打印的空格數
                for (int k = 1; k <= n - i; k++) 
                {
                    Console.Write(" ");
                }

                //這層循環控制每行前面打印*的個數
                for (int j = 1; j <= 2 * i - 1; j++)
                {
                    Console.Write("*");

                }

                //每打印完一行換一下行
                Console.Write("/n");
            }

            Console.ReadKey();

        }
    }
}