Sort array using Array.Sort function in C#
Nov 18, 2023 am 10:37 AM
Title: Example of using the Array.Sort function to sort an array in C
#Text:
In C#, array is a commonly used data structure , it is often necessary to sort arrays. C# provides the Array class, which has the Sort method to conveniently sort arrays. This article will demonstrate how to use the Array.Sort function in C# to sort an array and provide specific code examples.
First of all, we need to understand the basic usage of the Array.Sort function. The Array.Sort function accepts an array as a parameter and sorts the array elements in ascending order by default. If you need to sort by other specific criteria, you can pass a custom comparator function as the second parameter of Array.Sort.
Below we use a specific example to demonstrate how to use the Array.Sort function for sorting.
using System;
class Program
{
static void Main()
{
// 定義一個(gè)整型數(shù)組
int[] numbers = { 5, 2, 8, 3, 1 };
// 使用Array.Sort函數(shù)對(duì)數(shù)組進(jìn)行排序
Array.Sort(numbers);
// 輸出排序后的數(shù)組
Console.WriteLine("排序后的數(shù)組：");
foreach (int num in numbers)
{
Console.WriteLine(num);
}
}
}In the above example, we defined an integer array numbers, containing 5 elements {5, 2, 8, 3, 1}. Next, we sort the array using the Array.Sort function. Finally, the array is traversed through a foreach loop and the sorted elements are output to the console one by one.
Run the above code, the output is as follows:
排序后的數(shù)組： 1 2 3 5 8
As you can see, the Array.Sort function sorts the array in ascending order by default.
If we need to sort the array in descending order, we can pass a custom comparator function as the second parameter of Array.Sort. The following is a sample code that sorts in descending order:
using System;
class Program
{
static void Main()
{
// 定義一個(gè)整型數(shù)組
int[] numbers = { 5, 2, 8, 3, 1 };
// 使用Array.Sort函數(shù)對(duì)數(shù)組進(jìn)行排序，傳遞自定義的比較器函數(shù)
Array.Sort(numbers, (x, y) => y.CompareTo(x));
// 輸出排序后的數(shù)組
Console.WriteLine("按照降序排序后的數(shù)組：");
foreach (int num in numbers)
{
Console.WriteLine(num);
}
}
}In the above code, we pass a Lambda expression (x, y) => y.CompareTo(x) as an Array The second parameter of .Sort, this expression defines a comparator function used to specify descending sorting. Running this code, the output is as follows:
按照降序排序后的數(shù)組： 8 5 3 2 1
Through the above example, we can see that arrays can be sorted easily using the Array.Sort function in C#, and different sorting methods can be specified as needed.
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