Question

用C#输出菱形

*
***
*****
*******
*******
*****
***
*

Answer 1

            int i;
            int j;
            int k;
            for (i = 0; i <=10; i++)                /*输出上面10行的*号*/
            {
                for(j = 0; j <10 - i; j++)    
                    Console.Write("  ");               /*输出*前面的空格*/
                for (k = 0; k <2 * i-1; k++)
                    Console.Write("*");          /*输出一行（若干个）*号*/
                Console.WriteLine();
            }
            for (i = 0; i <= 9; i++)                 /*输出下面9行*号*/
            {
                for (j = 0; j<=i;j++)
                    Console.Write("  ");              /*输出*前面的空格*/
                for (k = 0; k<17-2 * i; k++)
                    Console.Write("*");          /*输出一行（若干个）*号*/
                Console.WriteLine();
            }