如何找到数组的最小值和最大值以及数组的平方和反转的数组？

Question

I'm trying to write a code that will give me the highest and lowest number in an array as well as the array squared and the reversed array. I keep getting 0's when I run the program but no other problem, so something is set equal to wrong but I can't figure out what's wrong because there's no error messages. Here's the code:

using System;

namespace ArrayMethods
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter an array size: ");
            int someArray = Convert.ToInt32(Console.ReadLine());


            int[] Array = new int[someArray];

            String input = Console.ReadLine();

            int[] arrayPart3 = new int[10];

            ReversedArray(arrayPart3);
            for (int index = 0; index < arrayPart3.Length; index++)
            {
                Console.Write(arrayPart3[index] + "| ");
            }
            Console.WriteLine();

            Console.WriteLine("Largest is:" + ArrayMax(arrayPart3));
            Console.WriteLine("Smallest is:" + ArrayMin(arrayPart3));

            SquaredArray(arrayPart3);
            for (int index = 0; index<arrayPart3.Length; index++)
            {
                Console.Write(arrayPart3[index] + "| ");
            }
            Console.WriteLine();

            ReversedArray(arrayPart3);
            for (int index = 0; index < arrayPart3.Length; index++)
            {
                Console.Write(arrayPart3[index] + "| ");
            }

        }

        public static int ArrayMax(int[] someArray)
        {
            int highest = someArray[0];
            for (int index = 0; index < someArray.Length; index++)
            {
                if (someArray[index] > highest)
                    highest = someArray[index];
            }
            return highest;
        }

        public static int ArrayMin(int[] someArray)
        {
            int lowest = someArray[0];
            for (int index = 0; index < someArray.Length; index++)
            {
                if (someArray[index] < lowest)
                    lowest = someArray[index];
            }
            return lowest;
        }

        public static void SquaredArray(int[]someArray)
        {

            for (int index = 0; index < someArray.Length; index++)
            {
                 someArray[index] = someArray[index] * someArray[index];
            }

        }


        public static void ReversedArray(int[] someArray)
        {
            for (int index = 0; index<someArray.Length; index++)
            {
                int temp = someArray[index];
                someArray[index] = someArray[someArray.Length - 1 - index];
                someArray[someArray.Length - 1 -index] = temp;
            }

        }
    }
}

Answer 1

the code of parsing the input is missing

here is a compact linq based code:

using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        var input = Console.ReadLine();
        // or use a fixed input: var input = "1 2 3 4";
        int[] arrayPart3 = input.Split(' ',',', ';').Select(s => int.Parse(s)).ToArray();

        Console.WriteLine("Reversed: " + string.Join("| ", arrayPart3.Reverse()));
        Console.WriteLine();

        Console.WriteLine("Largest is:" + arrayPart3.Max());
        Console.WriteLine("Smallest is:" + arrayPart3.Min());
        Console.WriteLine("Squared: " + string.Join("| ", arrayPart3.Select(i => i*i)));
        Console.WriteLine("Reversed Squared: " + string.Join("| ", arrayPart3.Reverse().Select(i => i*i)));

    }
}

Answer 2

As mentioned by @user287107 System.Linq provides most of these functions out of the box, for the squaring you can use a simple Select extension method Func.

Here is an ArrayUtils class I quickly wrote to provide the functionality you are looking for:

using System.Linq;

namespace StackOverflow
{
    public class ArrayUtils
    {
        public int GetMax(int[] arr)
        {
            return arr.Max();
        }

        public int GetMin(int[] arr)
        {
            return arr.Min();
        }

        public int[] GetReverse(int[] arr)
        {
            return arr.Reverse().ToArray();
        }

        public int[] SquareValues(int[] arr)
        {
            return arr.Select(x => x * x).ToArray();
        }
    }
}