0728多维数组，ArrayList集合

            

一.多维数组

             //一位数组
            //int[] shu = new int[] { 1,2,3};
            ////二维数组
            //int [,] array = new int[4,2];
            ////4，表示有四个一维数组
            ////2，表示每一个一维数组有2个元素
            //int[,] shuzu = new int[,]
            //{
            //{1,2},
            //{3,4},
            //{5,6},
            //{7,8}
            //};
            //for (int i = 0; i < 4; i++)
            //{
            //    for (int j = 0; j < 2; j++)
            //    {
            //        Console.Write(shuzu[i,j]+" ");
            //    }
            //}
            //Console.ReadLine();


           //打印自己喜欢的图案
            //string[,] a = new string[,]
            //{
            //  {"  ", "  ","  ","◆","  ","  ","  "},
            //  {"  ", "  ","◆","  ","◆","  ","  "},
            //  {"  ", "◆","  ","◆","  ","◆","  "},
            //  {"◆", "  ","◆","  ","◆","  ","◆"},
            //  {"  ", "◆","  ","◆","  ","◆","  "},
            //  {"  ", "  ","◆","  ","◆","  ","  "},
            //  {"  ", "  ","  ","■","  ","  ","  "},
            //};
            //for (int i = 0; i < 7; i++)
            //{
            //    for (int j = 0; j < 7; j++)
            //    {
            //        Console.Write(a[i, j]);
            //    }
            //    Console.WriteLine();

            //}
            //Console.ReadLine();

            //请输入班级人数，要求输入每个人的语数英进入数组
            //求语文总分，数学平均分，英语最高分
            //Console.Write("请输入班级人数：");
            //int n = int.Parse(Console.ReadLine());
            //double[,] fen = new double[n, 3];
            //double yuzong = 0;
            //double shuzong = 0;
            //for (int i = 0; i < n; i++)
            //{
            //    Console.Write("请输入第{0}个人的语文成绩：", i + 1);
            //    fen[i, 0] = double.Parse(Console.ReadLine());
            //    Console.Write("请输入第{0}个人的数学成绩：", i + 1);
            //    fen[i, 1] = double.Parse(Console.ReadLine());
            //    Console.Write("请输入第{0}个人的英语成绩：", i + 1);
            //    fen[i, 2] = double.Parse(Console.ReadLine());

            //}
            //for (int j = 0; j < n; j++)
            //{
            //    yuzong += fen[j, 0];

            //}
            //Console.WriteLine("语文总分为：" + yuzong);
            //for (int k = 0; k < n; k++)
            //{
            //    shuzong += fen[k, 1];
            //}
            //Console.WriteLine("数学平均分为：" + shuzong / n);
            //for (int z = 0; z < n-1;z++ )
            //{
            //    if (fen[z, 2] > fen[z + 1, 2])
            //    {
            //    }
            //    else
            //    {
            //        fen[z, 2] = fen[z + 1, 2];
            //        fen[z, 1] = fen[z + 1, 2];
            //        fen[z, 0] = fen[z + 1, 0];
               
            //    }
            //        Console.WriteLine("英语最高分为："+fen[z,2]);
            //}
            //Console.ReadLine();

            //多维数组
            //int[, ,] shuzu = new int[4, 3, 2];
            ////4，表示有四个二维数组
            ////3，表示每个二维数组里面有3个1维数组
            ////2,表示每个1维数组里面有2个元素

            //string[, ,] gao = new string[3, 4, 1]
            //    {
            //        {
            //            {"张三"},{"李四"},{"王五"},{"赵六"}
            //        },
            //       {
            //            {"冯七"},{"王八"},{"张全蛋"},{"小沈阳"}
            //       },
            //       {
            //            {"刘能"},{"赵四"},{"赵本山"},{"岳云鹏"}
            //       }
            //    };

            //split     分离
            //一次性接收姓名、年龄、工作单位
            //Console.Write("请输入您的姓名、年龄、工作单位（**-**-**）：");
            //string quan = Console.ReadLine();
            //string[] array = quan.Split('-');
            //for (int i = 0; i < array.Length; i++)
            //{
            //    Console.WriteLine(array[i]);
            //}
            //Console.ReadLine();

二.ArrayList集合

   

             //ArrayList al = new ArrayList();//初始化
            //al.Add(5);
            //al.Add(3);
            //al.Add(6);
            //al.Add(4);
            //al.Add(1);
            //al.Add(2);
            //al.Add("2");
            //al.Add("hello");
            //al.Add(true);
            //al[3] = "你好";
            //al.Clear(); 移除所有元素
            //ArrayList al1 = new ArrayList();
            //al1 = (ArrayList)al.Clone();//克隆
            ////判断是否包含
            //Console.WriteLine(al1.Contains("2"));
            ////获取第一次出现该元素的索引号
            //Console.WriteLine(al1.IndexOf(11));
            ////获取最后一次出现该元素的索引号
            //Console.WriteLine(al1.LastIndexOf(2));
            ////插入某个索引位置某个元素
            //al.Insert(2,"Hello");

            ////移除某个第一次出现的元素
            //al.Remove("hello");
            ////移除某个索引位置的元素
            //al.RemoveAt(3);

            //al.Sort();//排序 ，升序
            //al.Reverse();//翻转整个集合
            //Console.WriteLine(al[2]);
            //Console.WriteLine(al.Count);
            //Console.ReadLine();

            //输入班级人数，将每个人的姓名放进集合，然后全部读取
            //ArrayList name = new ArrayList();
            //Console.Write("请输入班级人数：");
            //int n = int.Parse(Console.ReadLine());
            //for (int i = 0; i < n; i++)
            //{
            //    Console.Write("请输入第{0}个人的姓名：",i+1);
            //    name.Add(Console.ReadLine());
            //}
            //Console.WriteLine("所有人员姓名输入完毕，请按回车键读取！");
            //Console.ReadLine();

            ////foreach    遍历集合
            //foreach (object aa in name)
            //{
            //    Console.Write(aa+" ");
            //}

            //Console.ReadLine();

            //object a;
            //int b = 4;
            //a = b;
            //double c = 3.14;
            //a = c;
            //bool d = true;
            //a = d;
            //string e = "Hello";
            //a = e;
            //DateTime dt = DateTime.Now;
            //a = dt;

            //输入班级人数，输入每个人的姓名，输入语数英成绩，进入集合
            //求语文的总分，数学的平均分，英语的最高分的姓名及各科分数（冒泡排序）
           

             第一种做法，在索引号上进行+4循环

            //Console.Write("请输入班级人数：");
            //int num = int.Parse(Console.ReadLine());
            //ArrayList al = new ArrayList();
            //double yuzong = 0;
            //double shuzong = 0;
            //for (int i = 0; i < num; i++)
            //{
            //    Console.Write("请输入第{0}个人的姓名：", i + 1);
            //    al.Add(Console.ReadLine());
            //    Console.Write("请输入第{0}个人的语文成绩：", i + 1);
            //    al.Add(double.Parse(Console.ReadLine().ToString()));
            //    Console.Write("请输入第{0}个人的数学成绩：", i + 1);
            //    al.Add(double.Parse(Console.ReadLine().ToString()));
            //    Console.Write("请输入第{0}个人的英语成绩：", i + 1);
            //    al.Add(double.Parse(Console.ReadLine().ToString()));
            //    yuzong = double.Parse((al[1 + 4*i]).ToString()) + yuzong;
            //    shuzong = double.Parse((al[2 +4*i]).ToString()) + shuzong;
            //}
            //Console.WriteLine("语文总分为：" + yuzong);
            //Console.WriteLine("数学平均分为：" + shuzong / num);

            //求英语最高分，将每一次循环的所有元素全部调换           

            //for (int j = 0; j < num; j++)
            //{
            //    for (int k = j; k < num - 1; k++)
            //    {
            //        if (double.Parse((al[3 + 4 * j]).ToString()) < (double.Parse((al[7 + 4 * k]).ToString())))
            //        {   
            //            //换英语
            //            double zhong = double.Parse((al[3 + 4 * j]).ToString());
            //            al[3 + 4 * j] = al[7 + 4 * k];
            //            al[7 + 4 * k] = zhong;
            //            //换姓名
            //            object zhong1 = al[0 + 4 * j];
            //            al[0 + 4 * j] = al[4 + 4 * k];
            //            al[4 + 4 * k] = zhong1;
            //            //换语文
            //            double zhong2 = double.Parse((al[1 + 4 * j]).ToString());
            //            al[1 + 4 * j] = al[5 + 4 * k];
            //            al[5 + 4 * k] = zhong2;
            //            //换数学
            //            double zhong3 = double.Parse((al[2 + 4 * j]).ToString());
            //            al[2 + 4 * j] = al[6 + 4 * k];
            //            al[6 + 4 * k] = zhong3;
            //        }
            //    }
            //}
            //Console.WriteLine("{0}的英语成绩为最高分为{1}，语文为{2}，数学为{3}。", al[0], al[3], al[1], al[2]);
            //Console.ReadLine();

             第二种做法，在循环条件上+4

            //Console.Write("请输入班级人数：");
            //int n = int.Parse(Console.ReadLine());
            //double yu = 0;
            //double shu = 0;
            //ArrayList al = new ArrayList();
            //for (int i = 0; i < n; i++)
            //{
            //    Console.Write("请输入第{0}个人的姓名：",i+1);
            //    al.Add(Console.ReadLine());
            //    Console.Write("请输入第{0}个人的语文成绩：",i+1);
            //    al.Add(double.Parse(Console.ReadLine()));
            //    yu += double.Parse(al[al.Count - 1].ToString());
            //    Console.Write("请输入第{0}个人的数学成绩：", i + 1);
            //    al.Add(double.Parse(Console.ReadLine()));
            //    shu += double.Parse(al[al.Count - 1].ToString());
            //    Console.Write("请输入第{0}个人的英语成绩：", i + 1);
            //    al.Add(double.Parse(Console.ReadLine()));
            //}
            //Console.WriteLine("所有信息输入完毕，请按回车键继续！");
            //Console.ReadLine();
            //Console.WriteLine("语文的总分是："+yu);
            //Console.WriteLine("数学的平均分是："+(shu/n));

           //求英语最高分，将每一次循环的所有元素全部调换

            //for (int i = 3; i < 4*n-1; i+=4)
            //{
            //    for (int j = i; j < 4 * n - 4; j += 4)
            //    {
            //        if (double.Parse(al[i].ToString()) < double.Parse(al[j + 4].ToString()))
            //        {
            //            //换姓名
            //            object zhong = al[i - 3];
            //            al[i - 3] = al[j + 1];
            //            al[j + 1] = zhong;
            //            //换语文
            //            zhong = al[i - 2];
            //            al[i - 2] = al[j + 2];
            //            al[j + 2] = zhong;
            //            //换数学
            //            zhong = al[i - 1];
            //            al[i - 1] = al[j + 3];
            //            al[j + 3] = zhong;
            //            //换英语
            //            zhong = al[i];
            //            al[i] = al[j + 4];
            //            al[j + 4] = zhong;
            //        }
            //    }
            //}
            //Console.WriteLine("英语最高分的学生是{0}，英语分数是{1}，语文分数是{2}，数学分数{3}",al[0],al[3],al[1],al[2]);
            //Console.ReadLine();

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原文地址：https://www.cnblogs.com/a12110303043/p/5715491.html