Sort array using Array.Sort function in C#

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()
    {
        // 定义一个整型数组
        int[] numbers = { 5, 2, 8, 3, 1 };

        // 使用Array.Sort函数对数组进行排序
        Array.Sort(numbers);

        // 输出排序后的数组
        Console.WriteLine("排序后的数组：");
        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:

排序后的数组：
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()
    {
        // 定义一个整型数组
        int[] numbers = { 5, 2, 8, 3, 1 };

        // 使用Array.Sort函数对数组进行排序，传递自定义的比较器函数
        Array.Sort(numbers, (x, y) => y.CompareTo(x));

        // 输出排序后的数组
        Console.WriteLine("按照降序排序后的数组：");
        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:

按照降序排序后的数组：
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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