数组作为方法参数时的一些意外情况

数组作为方法参数时的一些意外情况

今天在刷题时,使用数组作为方法的参数,出现了一些意外情况.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MyArray
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] nums = { 1, 2, 4, 5, 3, 2, 5, 6, 3 };
            Console.WriteLine("Array numbers:");
            foreach (int num in nums)
                Console.Write(num + "     ");

            Sort(nums);
            Console.WriteLine("\nAfter Sort:");
            foreach (int num in nums)
                Console.Write(num + "     ");

            Reverse(nums);
            Console.WriteLine("\nAfter Reverse:");
            foreach (int num in nums)
                Console.Write(num + "     ");

            Change(nums);
            Console.WriteLine("\nAfter Change:");
            foreach (int num in nums)
                Console.Write(num + "     ");

            SortAndChange(nums);
            Console.WriteLine("\nAfter SortAndChange:");
            foreach (int num in nums)
                Console.Write(num + "     ");

            DistinctAndChange(nums);
            Console.WriteLine("\nAfter DistinctAndChange:");
            foreach (int num in nums)
                Console.Write(num + "     ");

            Console.Read();
        }

        static void Sort(int[] nums)
        {
            nums = (from l in nums orderby l select l).ToArray();
        }

        static void Reverse(int[] nums)
        {
            nums = nums.Reverse().ToArray();
        }

        static void Change(int[] nums)
        {
            for (int i = 0; i < nums.Length - 1; i++)
                nums[i] = nums[i + 1];
        }

        static void SortAndChange(int[] nums)
        {
            nums = (from l in nums orderby l select l).ToArray();
            for (int i = 0; i < nums.Length - 1; i++)
                nums[i] = nums[i + 1];
        }

        static void DistinctAndChange(int[] nums)
        {
            int[] result = nums.Distinct().ToArray();
            for (int i = 0; i < nums.Length - 1; i++)
                nums[i] = nums[i + 1];
        }
    }
}

结果: