数组

            //一维数组【相同数据类型】
            //第一种定义方式
            int []shuzu=new int[5]

            //索引从0开始
            //赋值
            shuzu[0] = 1;
            shuzu[1] = 2;
            shuzu[2] = 3;
            shuzu[3] = 4;
            shuzu[4] = 5;
            //shuzu[5]=6;----错误的，索引从0开始，到索引值4就结束了。

            //第二种定义方式
            int[] shuzu1 = new int[] { 1, 2, 3, 4, 5 };

            Console.WriteLine(shuzu1[2]);

输入人名放进数组，输出第5个人的姓名

            Console.WriteLine("请输入班级人数：");
            int a = int.Parse(Console.ReadLine());

            string[] name = new string[a];

            for (int i=0;i<a ;i++ )//用for循环赋值给name数组
            {
                Console.WriteLine("请输入第"+(i+1)+"个人的姓名：");
                name[i]=Console.ReadLine();
            }
            Console.WriteLine(name[4]);

//二维数组
int[,] shuzu = new int[3, 4];----有3个二维数组，每个二维数组又有4个一维数组；
int[,] shuzu = new int[,] {
{1,2,3,4},
{5,6,7,8},
{6,7,8,9}
};

输入班级人数，将每个人的语文，数学，英语成绩输入二维数组

            Console.Write("输入班级人数：");
            int renshu = int.Parse(Console.ReadLine());
            double[,] shuzu = new double[renshu, 3];

            for (int i = 0; i < renshu; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    if (j == 0)
                    {
                        Console.WriteLine("请输入第" + (i + 1) + "个人的语文成绩：");
                    }
                    if (j == 1)
                    {
                        Console.WriteLine("请输入第" + (i + 1) + "个人的数学成绩：");
                    }
                    if (j == 2)
                    {
                        Console.WriteLine("请输入第" + (i + 1) + "个人的英语成绩：");
                    }
                    shuzu[i, j] = double.Parse(Console.ReadLine());
                }
            }

            Console.ReadLine();

//用二维数组输入“企”

            string[,] n = new string[9, 9]
                
            {   {" "," "," "," ","*"," "," "," "," "},
                {" "," "," ","*"," ","*"," "," "," "},
                {" "," ","*"," ","*"," ","*"," "," "},
                {" ","*"," "," ","*"," "," ","*"," "},
                {"*"," "," "," ","*","*","*"," ","*"},
                {" "," "," "," ","*"," "," "," "," "},
                {" "," ","*"," ","*"," "," "," "," "},
                {" "," ","*"," ","*"," "," "," "," "},
                {"*","*","*","*","*","*","*","*","*"}
            };

            for (int i = 0; i < 9; i++)
            {
                for (int j = 0; j < 9; j++)
                {
                    Console.Write(n[i, j]);
                }
                Console.WriteLine();
            }
            Console.ReadLine();