一维数组[相同数据类型]

第一种定义方式    一般使用第一种。

int[] shuzu=new int[5];for (int i=0;i<5;i++){  shuzu[i]=i+1;}

索引是从零开始的。

赋值：

shuzu[0] = 1;//索引号            shuzu[1] = 2;            shuzu[2] = 3;            shuzu[3] = 4;            shuzu[4] = 5;            //shuzu[5]=6;            Console.WriteLine();

第二种定义方式：

int[] shuzu = new int[] {1,2,3,4,5 };

例：

从控制台输入10个人的年龄放入数组，将10个人的年龄求总和

int[] age = new int[10];            int sum = 0;            for (int i = 0; i < 10; i++)            {                age[i] = int.Parse(Console.ReadLine());                sum += age[i];            }            Console.WriteLine(sum);

例：

输入班级人数，根据人数，挨个输入成绩，求平均分。

Console.WriteLine("请输入班级人数：");            int shu = int.Parse(Console.ReadLine());            double[] fen = new double[shu];            double sum = 0;            for (int i = 0; i <= shu; i++)            {                Console.WriteLine("请输入第" + (i + 1) + "人数");                fen[i] = double.Parse(Console.ReadLine());                sum += fen[i];            }            Console.Write("班级平均分:" + sum / shu);

二维数组：

int[,] shuzu = new int[3, 4];   //3个一维数组  每个里面有四个值。

/string[,] shuzu = new string[,]{}；

例：

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("请输入班级人数：");            int a = int.Parse(Console.ReadLine());            double[,] fen = new double[a, 3];            for (int i = 0; i < a; i++)            {                for (int j = 0; j < 3; j++)                {                    if (j == 0)                    {                        Console.Write("请输入第" + (i + 1) + "人的语文成绩：");                    }                    if (j == 1)                    {                        Console.Write("请输入第" + (i + 1) + "人的数学成绩：");                    }                    if (j == 2)                    {                        Console.Write("请输入第" + (i + 1) + "人的英语成绩：");                    }                    fen[i, j] = double.Parse(Console.ReadLine());                }            }

8行7列  企

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

 

foreach(int a in shuzu)//遍历数组

冒泡排序：从大到小

int[] shuzu = new int[] { 3, 1, 8, 4, 0, 5, 6 };            //8134056            //8314056            //8413056            //8513046            //8613045            //8631045            //8641035            //8651034            //8653014            //8654013            //8654103            //8654301            //8654310            int zhong;            for (int i = 0; i < 7; i++)            {                for (int j = i; j < 6; j++)                {                    if (shuzu[i] < shuzu[j + 1])                    {                        zhong = shuzu[i];                        shuzu[i] = shuzu[j + 1];                        shuzu[j + 1] = zhong;                    }                }            }            //for (int i = 0; i < 7; i++)            //{            //    Console.WriteLine(shuzu[i]);            //}            foreach (int a in shuzu)//遍历数组            {                Console.WriteLine(a);            }

object所有类的基类，可以接受 任何数组类型

object a = 1;

object b = "123";

object c = true;

object d = 3.14;