Csharp/CSharp Tutorial/Data Structure/Jagged Arrays
Содержание
Demonstrate jagged arrays
<source lang="csharp">using System;
class MainClass {
public static void Main() {
int[][] jagged = new int[3][];
jagged[0] = new int[4];
jagged[1] = new int[3];
jagged[2] = new int[5];
int i;
Console.WriteLine("store values in first array");
for(i=0; i < 4; i++)
jagged[0][i] = i;
Console.WriteLine("store values in second array");
for(i=0; i < 3; i++)
jagged[1][i] = i;
Console.WriteLine("store values in third array");
for(i=0; i < 5; i++)
jagged[2][i] = i;
Console.WriteLine("display values in first array");
for(i=0; i < 4; i++)
Console.Write(jagged[0][i] + " ");
Console.WriteLine();
Console.WriteLine("display values in second array");
for(i=0; i < 3; i++)
Console.Write(jagged[1][i] + " ");
Console.WriteLine();
Console.WriteLine("display values in third array");
for(i=0; i < 5; i++)
Console.Write(jagged[2][i] + " ");
Console.WriteLine();
}
}</source>
store values in first array store values in second array store values in third array display values in first array 0 1 2 3 display values in second array 0 1 2 display values in third array 0 1 2 3 4
Demonstrate Length with jagged arrays.
<source lang="csharp">using System;
class MainClass {
public static void Main() {
int[][] jaggedArray = new int[4][];
jaggedArray[0] = new int[3];
jaggedArray[1] = new int[7];
jaggedArray[2] = new int[2];
jaggedArray[3] = new int[5];
int i, j;
for(i=0; i < jaggedArray.Length; i++){
for(j=0; j < jaggedArray[i].Length; j++){
jaggedArray[i][j] = i * j + 70;
}
}
Console.WriteLine("Total number of network nodes: " +
jaggedArray.Length + "\n");
for(i=0; i < jaggedArray.Length; i++) {
for(j=0; j < jaggedArray[i].Length; j++) {
Console.Write(i + " " + j + ": ");
Console.Write(jaggedArray[i][j] + "% ");
Console.WriteLine();
}
Console.WriteLine();
}
}
}</source>
Total number of network nodes: 4 0 0: 70% 0 1: 70% 0 2: 70% 1 0: 70% 1 1: 71% 1 2: 72% 1 3: 73% 1 4: 74% 1 5: 75% 1 6: 76% 2 0: 70% 2 1: 72% 3 0: 70% 3 1: 73% 3 2: 76% 3 3: 79% 3 4: 82%
Jagged With SubArrays
A jagged array is an array of arrays in which the length of each array can differ.
<source lang="csharp">using System;
class MainClass
{
static void Main()
{
int[][,] Arr;
Arr = new int[2][,];
Arr[0] = new int[,] { { 1, 2 }, { 10, 20 } };
Arr[1] = new int[,] { { 3, 4, 5 }, { 30, 40, 50 } };
for (int i = 0; i < Arr.GetLength(0); i++)
{
for (int j = 0; j < Arr[i].GetLength(0); j++)
{
for (int k = 0; k < Arr[i].GetLength(1); k++)
{
Console.WriteLine ("[{0}][{1},{2}] = {3}", i, j, k, Arr[i][j, k]);
}
}
}
}
}</source>
[0][0,0] = 1 [0][0,1] = 2 [0][1,0] = 10 [0][1,1] = 20 [1][0,0] = 3 [1][0,1] = 4 [1][0,2] = 5 [1][1,0] = 30 [1][1,1] = 40 [1][1,2] = 50
Multidimensional jagged arrays
<source lang="csharp">using System; class MainClass {
public static void Main()
{
int[][] matrix = {new int[5], new int[4], new int[2] };
matrix[0][3] = 4;
matrix[1][1] = 8;
matrix[2][0] = 5;
for (int i = 0; i < matrix.Length; i++)
{
for (int j = 0; j < matrix[i].Length; j++)
{
Console.WriteLine("matrix[{0}, {1}] = {2}", i, j, matrix[i][j]);
}
}
}
}</source>
matrix[0, 0] = 0 matrix[0, 1] = 0 matrix[0, 2] = 0 matrix[0, 3] = 4 matrix[0, 4] = 0 matrix[1, 0] = 0 matrix[1, 1] = 8 matrix[1, 2] = 0 matrix[1, 3] = 0 matrix[2, 0] = 5 matrix[2, 1] = 0
Use foreach statement to loop through jagged array
<source lang="csharp">using System; class MainClass {
static void Main()
{
int[][] arr1 = new int[2][];
arr1[0] = new int[] { 1, 3 };
arr1[1] = new int[] { 1, 1, 4 };
foreach (int[] array in arr1)
{
Console.WriteLine("Starting new array");
foreach (int item in array)
{
Console.WriteLine(" Item: {0}", item);
}
}
}
}</source>
Starting new array Item: 1 Item: 3 Starting new array Item: 1 Item: 1 Item: 4
