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                ## **一維數組** ### 申明數組: >數組類型[] 數組名字; ### 分配內存空間 >數組名字 = new 數組元素類型[數組個數] 例子: ``` int[] arr; arr=new int[5] string[] strArr; strArr=new string[5] ``` ### 申明的同時為數組分配內存 例子: ``` string[] arr = new string[3]; //聲明 同時為數組分配內存 arr[0] = "a"; //添加值 arr[1] = "b"; arr[2] = "c"; ``` ### 初始化一維數組 例子: ``` char[] arr1 ={'a','b','c'};//聲明 int[] arr2=new int[]{1,2,3,4,5} 或者int[] arr2=new int[5]{1,2,3,4,5} int[] arr3={1,2,3,4,5} string[] arr = new string[]{ "a", "b", "3" }; string[] arr = { "a", "b", "3" }; ``` ## **二維數組** ### 申明二維數組: >數組類型[,] 數組名字; ### 分配內存空間 >數組名字 = new 數組元素類型[ 父元素個數,父元素的子元素個數] 例子: ``` // 1、直接為每一維數組分配內存 int[,] iarr;// 申明二維數組 iarr=new int[2,4];//分配內存空間 //賦值 iarr[0,0]=1; iarr[0,1]=2; iarr[0,2]=3; iarr[0,3]=4; iarr[1,0]=5; iarr[1,1]=6; iarr[1,2]=7; iarr[1,3]=8; string[,] sarr; sarr=new string[2,4]//分配內存空間 //賦值 sarr[0,0]="a"; ... sarr[1,3]="h"; // 2、分別為每一維數組分配內存 int[][] a=new int[2][];//申明父元素有兩個,先不指定父元素的子元素的個數 a[0]=new int[2];//指定父元素的第一個子元素的個數 a[1]=new int[3];//指定父元素的第二個子元素的個數 //賦值 a[0,0]=1; a[0,1]=2; a[1,0]=3; a[1,1]=4; a[1,2]=5; ``` ### 申明的同時為二維數組分配內存 例子: ``` int[,] i = new int[2, 4]; string[,] s = new string[2,4]; ``` ### 初始化二維數組 ``` int[,] myarr1 = new int[,] { { 1, 2 }, { 1, 2 } }; int[,] myarr2 = { { 1, 2 }, { 3, 4 } }; string[,] myarr3 = new string[,] { { "a", "b" }, { "a", "b" } }; string[,] myarr4 ={ { "a", "b" }, { "a", "b" } }; ```
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