zoukankan      html  css  js  c++  java
  • C#数组操作方法

    原文:http://it.100xuexi.com/view/otdetail/20130114/1fa06deb-23e8-4732-bb3c-5a066ea14bb2.html

    本文向大家介绍C#数组操作,可能好多人还不了解C#数组操作,没有关系,看完本文你肯定有不少收获,希望本文能教会你更多东西。

      数组是相同类型的对象的集合。由于数组几乎可以为任意长度,因此可以使用数组存储数千乃至数百万个对象,但必须在创建数组时就确定其大小。数组中的每项都按索引进行访问,索引是一个数字,指示对象在数组中的存储位置或槽。数组既可用于存储引用类型,也可用于存储值类型。
      C#数组操作程序:
    1.            using System;  
    2.            using System.Collections.Generic;  
    3.            using System.Text;  
    4.             
    5.            namespace ClassAboutArray  
    6.            {  
    7.            public class CreateArray  
    8.            {  
    9.            /// <summary> 
    10.        /// 一维数组的定义 
    11.        /// </summary> 
    12.        public void testArr1()  
    13.        {  
    14.        int[] myIntArr = new int[100];  
    15.        //定义一个长度为100的int数组 
    16.        string[] mystringArr = new string[100];  
    17.        //定义一个长度为100的string数组 
    18.        object[] myObjectArr = new object[100];  
    19.        //定义一个长度为100的int数组 
    20.         
    21.        int[] myIntArr2 = new int[] { 1, 2, 3 };   
    22.        //定义一个int数组,长度为3  
    23.        string[] mystringArr2 = new string[] { "", "" };  
    24.        //定义一个string数组,长度为2  
    25.        }  
    26.         
    27.        /// <summary> 
    28.        /// 多维数组的定义 
    29.        /// </summary> 
    30.        public void testArr2()  
    31.        {  
    32.        int[,] myIntArr = new int[10, 100];   
    33.        //定义一个10*100的二维int数组 
    34.        string[, ,] mystringArr = new string[2, 2, 3];   
    35.        //定义一个2*2*3的三维string数组   
    36.         
    37.        int[,] myIntArr2 = new int[,] { { 1, 2, 3 }, { -1, -2, -3 } };  
    38.        //定义一个2*3的二维int数组,并初始化 
    39.        string[,] mystringArr2 = new string[,] { { "", "" }, { "《围城》", "《晨露》" } };  
    40.        //定义一个2*2的二维string数组,并初始化 
    41.        }  
    42.         
    43.        /// <summary> 
    44.        /// 交错数组的定义 
    45.        /// </summary> 
    46.        public void testArr3()  
    47.        {  
    48.        int[][] myJaggedArray = new int[3][];  
    49.        myJaggedArray[0] = new int[5];  
    50.        myJaggedArray[1] = new int[4];  
    51.        myJaggedArray[2] = new int[2];  
    52.         
    53.        int[][] myJaggedArray2 = new int[][]  
    54.         {  
    55.        new int[] {1,3,5,7,9},  
    56.        new int[] {0,2,4,6},  
    57.        new int[] {11,22}  
    58.         };  
    59.        }  
    60.        }  
    61.         
    62.        public class TraverseArray  
    63.        {  
    64.        /// <summary> 
    65.        /// 使用GetLowerBound|GetUpperBound遍历数组 
    66.        /// </summary> 
    67.        public void test1()  
    68.        {  
    69.        //定义二维数组 
    70.        string[,] myStrArr2 = new string[,] 
    
    { { "", "" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } };  
    71.        //循环输出 
    72.        for (int i = myStrArr2.GetLowerBound(0); i <= myStrArr2.GetUpperBound(0); i++)  
    73.        {  
    74.        Console.WriteLine("item{0}", i);  
    75.        for (int j = myStrArr2.GetLowerBound(1); j <= myStrArr2.GetUpperBound(1); j++)  
    76.        {  
    77.        Console.WriteLine(" item{0}{1}:{2}", i, j, myStrArr2.GetValue(i, j));  
    78.        }  
    79.        }  
    80.        }  
    81.         
    82.        /// <summary> 
    83.        /// 使用foreach遍历数组 
    84.        /// </summary> 
    85.        public void test2()  
    86.        {  
    87.        //定义二维数组 
    88.        string[,] myStrArr2 = new string[,] 
    
    { { "", "" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } };  
    89.        //循环输出 
    90.        foreach (string item in myStrArr2)  
    91.        {  
    92.        {  
    93.        Console.WriteLine("{0}", item);  
    94.        }  
    95.        }  
    96.        }  
    97.        }  
    98.         
    99.        public class SortArray  
    100.     {  
    101.     /// <summary> 
    102.     /// 利用Sort方法进行数组排序 
    103.     /// </summary> 
    104.     public void test1()  
    105.     {  
    106.     //定义数组 
    107.     int[] myArr = { 5, 4, 3, 2, 1 };  
    108.      
    109.     //输出原始数组:原始数组:5->4->3->2->1-> 
    110.     Console.WriteLine("原始数组:");  
    111.     for (int i = 0; i < myArr.Length; i++)  
    112.     Console.Write("{0}->", myArr[i]);  
    113.     Console.WriteLine();  
    114.      
    115.     //对数组排序 
    116.     Array.Sort(myArr);  
    117.      
    118.     //并输出排序后的数组:1->2->3->4->5-> 
    119.     Console.WriteLine("排序以后数组:");  
    120.     for (int i = 0; i < myArr.Length; i++)  
    121.     Console.Write("{0}->", myArr[i]);  
    122.     }  
    123.      
    124.     /// <summary> 
    125.     /// 多个数组的关键字排序 
    126.     /// </summary> 
    127.     public void test2()  
    128.     {  
    129.     //定义数组 
    130.     int[] arrSid = { 5, 4, 3, 2, 1 };  
    131.     string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" };  
    132.      
    133.     //输出原始数组:原始数组:张三(5)->李四(4)->王五(3)->麻子(2)->淘气(1)-> 
    134.     Console.WriteLine("原始数组:");  
    135.     for (int i = 0; i < arrSid.Length; i++)  
    136.     Console.Write("{0}({1})->", arrSname[i], arrSid[i]);  
    137.     Console.WriteLine();  
    138.      
    139.     //根据学号关键字排序 
    140.     Array.Sort(arrSid, arrSname);  
    141.      
    142.     //并输出排序后的数组:淘气(1)->麻子(2)->王五(3)->李四(4)->张三(5)  
    143.     Console.WriteLine("排序以后数组:");  
    144.     for (int i = 0; i < arrSid.Length; i++)  
    145.     Console.Write("{0}({1})->", arrSname[i], arrSid[i]);  
    146.     }  
    147.     }  
    148.      
    149.     public class SearchArray  
    150.     {  
    151.     /// <summary> 
    152.     /// 利用BinarySearch方法搜索元素 
    153.     /// </summary> 
    154.     public void test1()  
    155.     {  
    156.     //定义数组 
    157.     int[] myArr = { 5, 4, 3, 2, 1 };  
    158.      
    159.     //对数组排序 
    160.     Array.Sort(myArr);  
    161.      
    162.     //搜索 
    163.     int target = 3;  
    164.     int result = Array.BinarySearch(myArr, target); //2  
    165.     Console.WriteLine("{0}的下标为{1}", target, result); //2  
    166.     }  
    167.      
    168.     /// <summary> 
    169.     /// 判断是否包含某个值 
    170.     /// </summary> 
    171.     public void test2()  
    172.     {  
    173.     //定义数组 
    174.     string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" };  
    175.      
    176.     //判断是否含有某值 
    177.     string target = "王五";  
    178.     bool result = ((System.Collections.IList)arrSname).Contains(target);  
    179.     Console.WriteLine("包含{0}?{1}", target, result); //true  
    180.     }  
    181.     }  
    182.      
    183.     public class ReverseArray  
    184.     {  
    185.     /// <summary> 
    186.     /// 利用Reverse方法反转数组 
    187.     /// </summary> 
    188.     public void test1()  
    189.     {  
    190.     //定义数组 
    191.     int[] myArr = { 5, 4, 3, 2, 1 };  
    192.      
    193.     //输出原始数组:原始数组:5->4->3->2->1-> 
    194.     Console.WriteLine("原始数组:");  
    195.     for (int i = 0; i < myArr.Length; i++)  
    196.     Console.Write("{0}->", myArr[i]);  
    197.     Console.WriteLine();  
    198.      
    199.     //对数组反转 
    200.     Array.Reverse(myArr);  
    201.      
    202.     //并输出反转后的数组:1->2->3->4->5-> 
    203.     Console.WriteLine("反转以后数组:");  
    204.     for (int i = 0; i < myArr.Length; i++)  
    205.     Console.Write("{0}->", myArr[i]);  
    206.     }  
    207.     }  
    208.      
    209.     public class CopyArray  
    210.     {  
    211.     /// <summary> 
    212.     /// 利用Copy静态方法复制数组 
    213.     /// </summary> 
    214.     public void test1()  
    215.     {  
    216.     //定义数组 
    217.     int[] myArr = { 5, 4, 3, 2, 1 };  
    218.      
    219.     //输出原始数组:原始数组:5->4->3->2->1-> 
    220.     Console.WriteLine("原始数组:");  
    221.     for (int i = 0; i < myArr.Length; i++)  
    222.     Console.Write("{0}->", myArr[i]);  
    223.     Console.WriteLine();  
    224.      
    225.     //复制数组 
    226.     int[] newnewArr = new int[3];  
    227.     Array.Copy(myArr, newArr, 3);  
    228.      
    229.     //并输出反复制的数组:5->4->3-> 
    230.     Console.WriteLine("复制数组:");  
    231.     for (int i = 0; i < newArr.Length; i++)  
    232.     Console.Write("{0}->", newArr[i]);  
    233.     }  
    234.      
    235.     /// <summary> 
    236.     /// 利用CopyTo实例方法复制数组 
    237.     /// </summary> 
    238.     public void test2()  
    239.     {  
    240.     //定义数组 
    241.     int[] myArr = { 5, 4, 3, 2, 1 };  
    242.      
    243.     //输出原始数组:原始数组:5->4->3->2->1-> 
    244.     Console.WriteLine("原始数组:");  
    245.     for (int i = 0; i < myArr.Length; i++)  
    246.     Console.Write("{0}->", myArr[i]);  
    247.     Console.WriteLine();  
    248.      
    249.     //复制数组 
    250.     int[] newnewArr = new int[7];  
    251.     myArr.CopyTo(newArr, 2);  
    252.      
    253.     //并输出反复制的数组:0->0->5->4->3->2->1-> 
    254.     Console.WriteLine("复制数组:");  
    255.     for (int i = 0; i < newArr.Length; i++)  
    256.     Console.Write("{0}->", newArr[i]);  
    257.     }  
    258.     }  
    259.      
    260.     public class DynamicCreateArray  
    261.     {  
    262.     /// <summary> 
    263.     /// 利用CreateInstance动态创建数组 
    264.     /// </summary> 
    265.     public void test1()  
    266.     {  
    267.     //定义长度数组 
    268.     int[] lengthsArr = new int[] { 3, 4 };  
    269.     int[] lowerBoundsArr = { 1, 11 };  
    270.      
    271.     Array arr = Array.CreateInstance(Type.GetType("System.Int32"), lengthsArr, lowerBoundsArr);  
    272.      
    273.     Random r = new Random(); //声明一个随机数对象 
    274.     //循环赋值、输出 
    275.     for (int i = arr.GetLowerBound(0) - 1; i < arr.GetUpperBound(0) - 1; i++)  
    276.     {  
    277.     for (int j = arr.GetLowerBound(1) - 1; j < arr.GetUpperBound(1) - 1; j++)  
    278.     {  
    279.     arr.SetValue((int)r.Next() % 100, i, j);//用1~100的随即数赋值 
    280.     Console.WriteLine("arr[{0},{1}]={3}", i, j, arr.GetValue(i, j));  
    281.     }  
    282.     }  
    283.     }  
    284.     }  
    285.     } 
  • 相关阅读:
    lodash函数库----difference
    lodash 函数库-
    lodash函数库 -- chunk
    document.selection.createRange方法----获取用户选择文本
    复制到剪切板 clipboard
    下载图片到本地
    H5(11表格案例:小说排行榜)
    H5(10HTML标签学习)
    H5(09综合案例圣诞老人介绍)
    H5(08常用标签02,绝对,相对路径)
  • 原文地址:https://www.cnblogs.com/pwenlee/p/4108217.html
Copyright © 2011-2022 走看看