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:
using System;
using System.Collections.Generic;
using System.Text;
namespace ClassAboutArray
{
public class CreateArray
{
/// <summary>
/// 一维数组的定义
/// </summary>
public void testArr1()
{
int[] myIntArr = new int[100];
//定义一个长度为100的int数组
string[] mystringArr = new string[100];
//定义一个长度为100的string数组
object[] myObjectArr = new object[100];
//定义一个长度为100的int数组
int[] myIntArr2 = new int[] { 1, 2, 3 };
//定义一个int数组,长度为3
string[] mystringArr2 = new string[] { "油", "盐" };
//定义一个string数组,长度为2
}
/// <summary>
/// 多维数组的定义
/// </summary>
public void testArr2()
{
int[,] myIntArr = new int[10, 100];
//定义一个10*100的二维int数组
string[, ,] mystringArr = new string[2, 2, 3];
//定义一个2*2*3的三维string数组
int[,] myIntArr2 = new int[,] { { 1, 2, 3 }, { -1, -2, -3 } };
//定义一个2*3的二维int数组,并初始化
string[,] mystringArr2 = new string[,] { { "油", "盐" }, { "《围城》", "《晨露》" } };
//定义一个2*2的二维string数组,并初始化
}
/// <summary>
/// 交错数组的定义
/// </summary>
public void testArr3()
{
int[][] myJaggedArray = new int[3][];
myJaggedArray[0] = new int[5];
myJaggedArray[1] = new int[4];
myJaggedArray[2] = new int[2];
int[][] myJaggedArray2 = new int[][]
{
new int[] {1,3,5,7,9},
new int[] {0,2,4,6},
new int[] {11,22}
};
}
}
public class TraverseArray
{
/// <summary>
/// 使用GetLowerBound|GetUpperBound遍历数组
/// </summary>
public void test1()
{
//定义二维数组
string[,] myStrArr2 = new string[,]
{ { "油", "盐" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } };
//循环输出
for (int i = myStrArr2.GetLowerBound(0); i <= myStrArr2.GetUpperBound(0); i++)
{
Console.WriteLine("item{0}", i);
for (int j = myStrArr2.GetLowerBound(1); j <= myStrArr2.GetUpperBound(1); j++)
{
Console.WriteLine(" item{0}{1}:{2}", i, j, myStrArr2.GetValue(i, j));
}
}
}
/// <summary>
/// 使用foreach遍历数组
/// </summary>
public void test2()
{
//定义二维数组
string[,] myStrArr2 = new string[,]
{ { "油", "盐" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } };
//循环输出
foreach (string item in myStrArr2)
{
{
Console.WriteLine("{0}", item);
}
}
}
}
public class SortArray
{
/// <summary>
/// 利用Sort方法进行数组排序
/// </summary>
public void test1()
{
//定义数组
int[] myArr = { 5, 4, 3, 2, 1 };
//输出原始数组:原始数组:5->4->3->2->1->
Console.WriteLine("原始数组:");
for (int i = 0; i < myArr.Length; i++)
Console.Write("{0}->", myArr[i]);
Console.WriteLine();
//对数组排序
Array.Sort(myArr);
//并输出排序后的数组:1->2->3->4->5->
Console.WriteLine("排序以后数组:");
for (int i = 0; i < myArr.Length; i++)
Console.Write("{0}->", myArr[i]);
}
/// <summary>
/// 多个数组的关键字排序
/// </summary>
public void test2()
{
//定义数组
int[] arrSid = { 5, 4, 3, 2, 1 };
string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" };
//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)->
Console.WriteLine("原始数组:");
for (int i = 0; i < arrSid.Length; i++)
Console.Write("{0}({1})->", arrSname[i], arrSid[i]);
Console.WriteLine();
//根据学号关键字排序
Array.Sort(arrSid, arrSname);
//并输出排序后的数组:淘气(1)->麻子(2)->王五(3)->李四(4)->张三(5)
Console.WriteLine("排序以后数组:");
for (int i = 0; i < arrSid.Length; i++)
Console.Write("{0}({1})->", arrSname[i], arrSid[i]);
}
}
public class SearchArray
{
/// <summary>
/// 利用BinarySearch方法搜索元素
/// </summary>
public void test1()
{
//定义数组
int[] myArr = { 5, 4, 3, 2, 1 };
//对数组排序
Array.Sort(myArr);
//搜索
int target = 3;
int result = Array.BinarySearch(myArr, target); //2
Console.WriteLine("{0}的下标为{1}", target, result); //2
}
/// <summary>
/// 判断是否包含某个值
/// </summary>
public void test2()
{
//定义数组
string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" };
//判断是否含有某值
string target = "王五";
bool result = ((System.Collections.IList)arrSname).Contains(target);
Console.WriteLine("包含{0}?{1}", target, result); //true
}
}
public class ReverseArray
{
/// <summary>
/// 利用Reverse方法反转数组
/// </summary>
public void test1()
{
//定义数组
int[] myArr = { 5, 4, 3, 2, 1 };
//输出原始数组:原始数组:5->4->3->2->1->
Console.WriteLine("原始数组:");
for (int i = 0; i < myArr.Length; i++)
Console.Write("{0}->", myArr[i]);
Console.WriteLine();
//对数组反转
Array.Reverse(myArr);
//并输出反转后的数组:1->2->3->4->5->
Console.WriteLine("反转以后数组:");
for (int i = 0; i < myArr.Length; i++)
Console.Write("{0}->", myArr[i]);
}
}
public class CopyArray
{
/// <summary>
/// 利用Copy静态方法复制数组
/// </summary>
public void test1()
{
//定义数组
int[] myArr = { 5, 4, 3, 2, 1 };
//输出原始数组:原始数组:5->4->3->2->1->
Console.WriteLine("原始数组:");
for (int i = 0; i < myArr.Length; i++)
Console.Write("{0}->", myArr[i]);
Console.WriteLine();
//复制数组
int[] newnewArr = new int[3];
Array.Copy(myArr, newArr, 3);
//并输出反复制的数组:5->4->3->
Console.WriteLine("复制数组:");
for (int i = 0; i < newArr.Length; i++)
Console.Write("{0}->", newArr[i]);
}
/// <summary>
/// 利用CopyTo实例方法复制数组
/// </summary>
public void test2()
{
//定义数组
int[] myArr = { 5, 4, 3, 2, 1 };
//输出原始数组:原始数组:5->4->3->2->1->
Console.WriteLine("原始数组:");
for (int i = 0; i < myArr.Length; i++)
Console.Write("{0}->", myArr[i]);
Console.WriteLine();
//复制数组
int[] newnewArr = new int[7];
myArr.CopyTo(newArr, 2);
//并输出反复制的数组:0->0->5->4->3->2->1->
Console.WriteLine("复制数组:");
for (int i = 0; i < newArr.Length; i++)
Console.Write("{0}->", newArr[i]);
}
}
public class DynamicCreateArray
{
/// <summary>
/// 利用CreateInstance动态创建数组
/// </summary>
public void test1()
{
//定义长度数组
int[] lengthsArr = new int[] { 3, 4 };
int[] lowerBoundsArr = { 1, 11 };
Array arr = Array.CreateInstance(Type.GetType("System.Int32"), lengthsArr, lowerBoundsArr);
Random r = new Random(); //声明一个随机数对象
//循环赋值、输出
for (int i = arr.GetLowerBound(0) - 1; i < arr.GetUpperBound(0) - 1; i++)
{
for (int j = arr.GetLowerBound(1) - 1; j < arr.GetUpperBound(1) - 1; j++)
{
arr.SetValue((int)r.Next() % 100, i, j);//用1~100的随即数赋值
Console.WriteLine("arr[{0},{1}]={3}", i, j, arr.GetValue(i, j));
}
}
}
}
}
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