C# 打印空心、实心菱形

使用c#控制台应用程序打印空心、实心菱形

using System;

namespace ConsoleApp1
{
    /**//// <summary>
    /// Class1 的摘要说明。
    /// </summary>
    class Class1
    {
        public static int N;
        public static int i,j,k;
        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            //
            // TODO: 在此处添加代码以启动应用程序
            //
            N = 4;
            PrintSolidRhombus();
            Console.WriteLine();
            PrintHollowRhombus();
            Console.ReadLine();
        }
        /**//// <summary>
        /// 打印空心菱形
        /// </summary>
        public static void PrintHollowRhombus()
        {
            for(i=1;i<=N;i++)
            {
                for(j=N;j>i;j--)
                {
                    Console.Write(" ");
                }
                for(k=1;k<2*i;k++)
                {
                    if(k==1||k==2*i-1)
                    {
                        Console.Write("*");
                    }
                    else
                    {
                        Console.Write(" ");
                    }
                }
                Console.WriteLine();
            }
            for(i=0;i<N-1;i++)
            {
                for(j=0;j<=i;j++)
                {
                    Console.Write(" ");
                }
                for(k=1;k<2*(N-1)-2*i;k++)
                {
                    if(k==1||k==(2*(N-1)-2*i-1))
                        Console.Write("*");
                    else
                    {
                        Console.Write(" ");
                    }
                }
                Console.WriteLine();
            }
            
        }
        /**//// <summary>
        /// 打印实心菱形
        /// </summary>
        public static void PrintSolidRhombus()
        {
            for(i=1;i<=N;i++)
            {
                for(j=N;j>i;j--)
                {
                    Console.Write(" ");
                }
                for(k=1;k<2*i;k++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            for(i=0;i<N-1;i++)
            {
                for(j=0;j<=i;j++)
                {
                    Console.Write(" ");
                }
                for(k=1;k<2*(N-1)-2*i;k++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            
        }
    }
}