C#数组学习

1.多维数组

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ControlProject
{
    class Program
    {
        static void Main(string[] args)
        {
            //新建一个3*4的数组
            string[,] person = new string[3, 4];
            person[0, 0] = "姓名";
            person[0, 1] = "性别";
            person[0, 2] = "职业";
            person[0, 3] = "年龄";

            person[1, 0] = "神秘";
            person[1, 1] = "帅哥";
            person[1, 2] = "农民工";
            person[1, 3] = "26岁";

            person[2, 0] = "小白";
            person[2, 1] = "男";
            person[2, 2] = "大宅男";
            person[2, 3] = "27岁";

            StringBuilder sb = new StringBuilder();//用一个可变字符串对象来接收循环中的值

            //取出数组二维数组的长度
            int x = person.GetLength(0);
            int y = person.GetLength(1);

            for (int i = 0; i < x; i++)
            {
                for (int j = 0; j < y; j++)
                {
                    sb.Append(person[i, j] + "   |   ");
                }
                sb.Append("
----------------------------------------------
");
            }

            Console.WriteLine(sb.ToString());
        }
    }
}

2.锯齿数组

在锯齿数组中，每一行都可以有不同的大小。

锯齿数组的效率比多维数组要高很多。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ControlProject
{
    class Program
    {
        static void Main(string[] args)
        {
            int[][] myint = new int[3][];
            myint[0] = new int[3] { 1, 2, 3 };
            myint[1] = new int[2] { 1, 2 };
            myint[2] = new int[3] { 1, 2, 3 };

            foreach (int[] i in myint)
            {
                foreach (int x in i)
                {
                    Console.Write(x + ",");
                }
                Console.WriteLine();
            }
            
        }
    }
}

3.Array类

数组类型是从抽象基类型Array派生的引用类型，

由于此类型实现了IEnumerable和IEnumerable<(Of<(T>)>), 因此可以对C#中的所有数组使用foreach迭代

4.ArrayList