空心菱形

Question

空心菱形怎么打？

Answer 1

int n = 5; //输出菱形边上*的个数
            int d = n * 2 - 1;
            for (int i = 1; i <= n; i++)
            {
                for (int j = 1; j <= n + i - 1; j++)
                    if ((j != n - i + 1) && (j != n + i - 1))
                    {
                        Console.Write(" ");
                    }
                    else
                    {
                        Console.Write("*");
                    }
                Console.Write("\n");
            }            for (int i = n; i >= 1; i--)
            {
                for (int j = d; j >= 1; j--)
                {
                    if ((j != n + i - 1) && (j != n - i + 1))
                    {
                        Console.Write(" ");
                    }
                    else
                    {
                        Console.Write("*");
                    }
                }
                Console.Write("\n");
            }
            Console.ReadKey();