三角形打印练习

//让用户输入一个奇数，打印上面最后的菱形，最长的个数是用户输入的个数

            Console.Write("请输入一个奇数：");//提示用户输入数字

            int n = int.Parse(Console.ReadLine());

            if (n % 2 != 0)//不能被2整除的数

            {

                for (int i = 1; i <= n; i++)//菱形上半部分打印循环

                {

                    for (int j = n - 1; j >= i; j--)

                    {

                        Console.Write(" ");//循环打印j个空格

                    }

                    for (int k = 1; k <= i; k++)

                    {

                        Console.Write("★");//循环打印k个★

                    }

 

                    Console.WriteLine();

                }

                for (int i = 1; i <= n; i++)//菱形下半部分

                {

                    for (int k = 1; k <= i; k++)

                    {

                        Console.Write(" ");//循环打印k个空格

                    }

                    for (int j = n - 1; j >= i; j--)

                    {

                        Console.Write("★");//循环打印j个★

                    }

 

                    Console.WriteLine();

                }

            }

            else

            {

                Console.WriteLine("您的输入有误！");

            }