5.控制台输出空心菱形

1.空心菱形

        public static void Main(string[] args)
        {
            int hangshu = 11;
            int yiban = hangshu / 2 + 1;  //6
            int yibanduo = hangshu / 2;  //5
            for (int i = 1; i < yiban; i++)
            {
                int count = 1;
                for (int j = i; j < yiban; j++)
                {
                    //Console.Write("&");
                    Console.Write(" ");
                }
                for (int z = 1; z <= 2 * i - 1; z++)
                {

                    if (count > 1 && count < 2 * i - 1)
                    {
                        //Console.Write("#");
                        Console.Write(" ");
                    }
                    else
                    {
                        Console.Write("*");
                    }
                    count++;
                }
                Console.WriteLine();
            }

            for (int i = 1; i < yibanduo; i++)
            {
                int count = 1;
                for (int j = 1; j <= i + 1; j++)
                {
                    //Console.Write("&");
                    Console.Write(" ");
                }
                for (int z = 0; z < 2 * (yibanduo - i) - 1; z++)
                {
                    if (count > 1 && count < 2 * (yibanduo - i) - 1)
                    {
                        //Console.Write("#");
                        Console.Write(" ");
                    }
                    else
                    {
                        Console.Write("*");
                    }
                    count++;
                }
                Console.WriteLine();
            }
            Console.ReadKey();
        }

2.输出菱形

        public static void Main(string[] args)
        {
            Console.Write("请输入多少行？");
            int a = int.Parse(Console.ReadLine());
            for (int i = 1; i <= a; i++)
            {
                for (int j = 1; j <= a - i; j++)
                {
                    Console.Write(" ");
                }
                for (int z = 1; z <= 2 * i - 1; z++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            for (int i = 0; i < a - 1; i++)
            {
                for (int j = 0; j <= i; j++)
                {
                    Console.Write(" ");
                }
                for (int z = 0; z < 2 * (a - i - 1) - 1; z++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }

            Console.ReadKey();
        }