C# 數組Array

數組是對相同類型的一組數據的封裝。數組定義的時候，要說明是對哪一種類型的封裝，並且要指定長度。

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 
  6 namespace TestArrayList
  7 {
  8     class Program
  9     {
 10         static void Main(string[] args)
 11         {
 12             //System.Array
 13             //1、數組[]特定類型、固定長度
 14             string[] str1 = new string[3];
 15             str1[0] = "a";
 16             str1[1] = "b";
 17             str1[2] = "c";
 18             Console.WriteLine(str1[2]);
 19 
 20             string[] str2 = new string[] { "a", "b", "c" };
 21             Console.WriteLine(str2[0]);
 22 
 23             string[] str3 = { "a", "b", "c" };
 24             Console.WriteLine(str3[0]);
 25 
 26             //2.二維數組
 27             //int[,] intArray = new int 
 28             int[,] intArray = new int[2, 3];
 29             intArray[0, 0] = 1;
 30             intArray[0, 1] = 11;
 31             intArray[0, 2] = 111;
 32             intArray[1, 0] = 2;
 33             intArray[1, 1] = 22;
 34             intArray[1, 2] = 222;
 35             Console.WriteLine("{0},{1},{2}", intArray[0, 0], intArray[0, 1], intArray[0, 2]);
 36             Console.WriteLine("{0},{1},{2}", intArray[1, 0], intArray[1, 1], intArray[1, 2]);
 37 
 38             //3多維數組
 39             int[, ,] intArray1 = new int[,,]
 40             {
 41                {{1,1},{11,11},{111,111}},
 42                {{2,2},{22,22},{33,33}},
 43                {{3,3},{33,33},{333,333}}
 44             };
 45             Console.WriteLine("多維數組");
 46             Console.WriteLine("{0},{1},{2},{3},{4},{5}", intArray1[0, 0, 0], intArray1[0, 0, 1], intArray1[0, 1, 0], intArray1[0, 1, 1], intArray1[0, 2, 0], intArray1[0, 2, 1]);
 47             Console.WriteLine("{0},{1},{2},{3}", intArray1[1, 0, 0], intArray1[1, 0, 1], intArray1[1, 1, 0], intArray1[1, 1, 1]);
 48             Console.WriteLine("{0},{1},{2},{3},{4},{5}", intArray1[2, 0, 0], intArray1[2, 0, 1], intArray1[2, 1, 0], intArray1[2, 1, 1], intArray1[2, 2, 0], intArray1[2, 2, 1]);
 49 
 50             //4交錯數組即數組的數組
 51             int[][] intArray2 = new int[4][];
 52             intArray2[0] = new int[] { 1 };
 53             intArray2[1] = new int[] { 2, 22 };
 54             intArray2[2] = new int[] { 3, 33, 333 };
 55             intArray2[3] = new int[] { 4, 44, 444, 4444 };
 56             Console.WriteLine("交錯數組");
 57             for (int i = 0; i < intArray2.Length; i++)
 58             {
 59                 for (int j = 0; j < intArray2[i].Length; j++)
 60                 {
 61                     Console.WriteLine("{0}", intArray2[i][j]);
 62                 }
 63             }
 64             Console.ReadKey();
 65             int[] myIntArray = new int[5] { 1, 2, 3, 4, 5 };
 66             Object[] myObjArray = new Object[5] { 26, 27, 28, 29, 30 };
 67             Console.WriteLine("Initially,");
 68             Console.Write("integer array:");
 69             PrintValues(myIntArray);
 70             Console.Write("Object array: ");
 71             PrintValues(myObjArray);
 72 
 73             System.Array.Copy(myIntArray, myObjArray, 2);
 74 
 75             Console.WriteLine("\n After copying the first two elements of the integer array to the Object array.");
 76             Console.Write("integer array:");
 77             PrintValues(myIntArray);
 78             Console.Write("Object array: ");
 79             PrintValues(myObjArray);
 80 
 81             System.Array.Copy(myObjArray, myObjArray.GetUpperBound(0) - 1, myIntArray, myIntArray.GetUpperBound(0) - 1, 2);
 82 
 83             Console.WriteLine("\nAfter copying the last two elements of the object array to the integer array,");
 84             Console.Write("integer array:");
 85             PrintValues(myIntArray);
 86             Console.Write("Object array:");
 87             PrintValues(myObjArray);
 88             Console.ReadKey();
 89         }
 90 
 91         public static void PrintValues(Object[] myArr)
 92         {
 93             foreach (Object i in myArr)
 94             {
 95                 Console.Write("\t{0}", i);
 96             }
 97             Console.WriteLine();
 98         }
 99 
100         public static void PrintValues(int[] myArr)
101         {
102             foreach (int i in myArr)
103             {
104                 Console.Write("\t{0}", i);
105             }
106             Console.WriteLine();
107         }
108     }
109 }

運行結果如下：

數組是一種數據類型，並且二維數組在圖像處理中會應用。一維數組的起始下標是[0]。二維數組的起始下標是[0,0]。交錯也稱參差數組的起始下標是[0][0]。

數組一定是固定長度和類型確定並且有序的，這種呆板的數據類型，導致它的INSERT，非常不方便，於是有了ArrayList

那麼C#中數組是引用類型？還是值類型？C#中數組是引用類型，為什麼是引用類型，依據是什麼？