二维数组，多维数组

二维数组，多维数组
//定义二维数组
 int[,] a=new int [3,2]     //3表示有三个一维数组，2表示每一个一位数组中有两个元素

int[,] a=new int [3,4]{
            {1,2,3,4},
            {5,6,7,8},
            {9,8,7,6}
            };
            //打印出来
            for (int i = 0; i < 3;i++ )
            {
                for(int j=0;j<4;j++)
                {
                    Console.Write(a[i,j]+"	");
                }
                Console.WriteLine();
            }

　　

//输入班级人数，输入每人的语数英成绩再打印出来,求语文两个最高分，数学两个最低分，英语平均分 

Console.Write("输入班级人数：");
            int n = int.Parse(Console.ReadLine());
            double[,] a = new double[n, 3];
            for (int i = 0; i < n; i++)
            {
                Console.Write("输入第{0}个人的语文成绩：", i + 1);
                a[i, 0] = double.Parse(Console.ReadLine());
                Console.Write("输入第{0}个人的数学成绩：", i + 1);
                a[i, 1] = double.Parse(Console.ReadLine());
                Console.Write("输入第{0}个人的英语成绩：", i + 1);
                a[i, 2] = double.Parse(Console.ReadLine());
            }
            Console.WriteLine("输入完毕！");
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    Console.Write(a[i, j] + "	");
                }
                Console.WriteLine();
            }
            double sum = 0;
            for (int i = 0; i < n - 1; i++)
            {
                for (int j = i + 1; j < n; j++)
                {
                    if (a[i, 0] < a[j, 0])
                    {
                        double t = a[i, 0];
                        a[i, 0] = a[j, 0];
                        a[j, 0] = t;
                    }
                    if (a[i, 1] > a[j, 1])
                    {
                        double t = a[i, 1];
                        a[i, 1] = a[j, 1];
                        a[j, 1] = t;
                    }
                }
                sum += a[i, 2];
            }
            Console.WriteLine("语文两个最高分为{0},{1};数学两个最低分为{2},{3};英语平均分为{4}", a[0, 0], a[0, 1], a[1, 0], a[1, 1], sum / n);

//打印“马”这个字

string[,] a = new string[,]{
            {"  ","■","■","■","■","  ",""},
            {"  ","  ","■","  ","■","",""},
            {"  ","  ","■","  ","■","",""},
            {"  ","  ","■","■","■","■","■"},
            {"  ","  ","  ","  ","  ","  ","■"},
            {"■","■","■","■","■","■","■"},
            {"  ","  ","  ","  ","  ","  ","■"},
            {"  ","  ","  ","  ","  ","■","■"},
        };
            for (int i = 0; i < 8; i++)
            {
                for (int j = 0; j < 7; j++)
                {
                    Console.Write(a[i, j]);
                }
                Console.WriteLine();
            }

//一维数组是一条线，二维数组是一个面（表格）
//三维数组是一个立体（教学楼）
//int[,,]a=new int[,,];

//split() 以***进行分割
//分割出来的内容放置在string类型中，不需要给数组定义长度

            Console.Write("请输入姓名,年龄,工作单位：");
            string s = Console.ReadLine();
            string[] a = s.Split(',');
            foreach (string aa in a)
            {
                Console.WriteLine(aa);
            }

　　

 //春眠不觉晓，处处闻啼鸟。夜来风雨声，花落知道多少。替换文字

string a = "春眠不觉晓，处处闻啼鸟。夜来风雨声，花落知道多少。";
            a = a.Replace("处", "这儿");
            Console.WriteLine(a);

string[,] a = new string[4, 6]
            {
                {"春","眠","不","觉","晓","，"},
                {"处","处","闻","啼","鸟","。"},
                {"夜","来","风","雨","声","，"},
                {"花","落","知","多","少","。"}
            };
            for (int i = 0; i < 4; i++)
            {
                for (int j = 0; j < 6; j++)
                {
                    if (a[i, j] == "处")
                    {
                        a[i, j] = "这儿";
                    }
                    Console.Write(a[i, j]);
                }
                Console.WriteLine();
            }