数组比较，学校任务不工作

本文关键字：工作 任务 学校 比较 数组 | 更新日期: 2023-09-27 18:02:25

第一个帖子，如果我做错了什么请告诉我:)

我有这样的代码:

    static void Main(string[] args)
    {
        //declaring first array
        Console.Write("Enter the size of the first the array: ");
        int sizeOne = Int32.Parse(Console.ReadLine());
        int[]firstArray = new int[sizeOne];
        //fill it from console
        for (int counter = 0; counter<=sizeOne - 1; counter++)
        {
            Console.Write("Please enter a value: ");
            firstArray[counter] = Int32.Parse(Console.ReadLine());
            //for test
            // Console.WriteLine(firstArray[counter]);
        }
        //declaring second array
        Console.Write("Enter the size of the second array: ");
        int sizeTwo = Int32.Parse(Console.ReadLine());
        int[] secondArray = new int[sizeTwo];
        //fill it from console
        for (int counter = 0; counter <= sizeTwo - 1; counter++)
        {
            Console.Write("Please enter a value: ");
            firstArray[counter] = Int32.Parse(Console.ReadLine());
            //for test
            // Console.WriteLine(secondArray[counter]);
        }
        //compare size and values, as sidenote it could write not equal even 
        //when the user inputs two arrays with different lengths to save time :)
        if (firstArray.Length == secondArray.Length)
        {
            for (int counter = 0; counter <= sizeOne; counter++)
            {
                if ((firstArray[counter]) != (secondArray[counter]))
                {
                    Console.WriteLine("The two arrays aren't equal");
                    break;
                }
                else
                {
                    Console.WriteLine("The two arrays are equal");                        
                }
            }
        }
        else
        {
            Console.WriteLine("The two arrays aren't equal");
        }
    }

应该比较数组的长度和元素。如果两个数组长度不同，但元素数相等，它总是写不相等。我错过了什么?

提前感谢您的帮助!

数组比较，学校任务不工作

这是一个打字错误，或者复制粘贴错误，随便你怎么称呼它。在第二个循环中，当你应该填充secondArray时，你错误地填充了firstArray。这意味着secondArray只有0。您可能很幸运(或不走运)，因为firstArray的大小总是等于或大于secondArray。否则你就会得到一个异常，这可能会帮助你发现你的错误。

注意，一旦你修复了它，你也会得到一个越界异常，因为你的比较循环使用counter <= sizeOne条件，这是错误的。它应该是counter < sizeOne，否则您将越过数组的末尾。

稍微修改一下循环:您需要一个布尔标志，它指示是否存在不匹配。否则，如果只有第一个元素匹配，则输出"两个数组是相等的"。

if (firstArray.Length == secondArray.Length)
{
    bool areEqual = true;
    for (int counter = 0; counter < firstArray.Length; counter++)
    {
        if ((firstArray[counter]) != (secondArray[counter]))
        {
            areEqual = false;
            //Console.WriteLine("The two arrays aren't equal");
            break;
        }
        // This would get executed if the first elements are equal, but others are not
        //else
        //{
        //  Console.WriteLine("The two arrays are equal");                        
        //}
    }
    if (areEqual)
       Console.WriteLine("The two arrays are equal"); 
    else 
       Console.WriteLine("The two arrays aren't equal");
}

然后当然有一个内置函数(在。net中)称为SequenceEqual，它比较两个数组:

using System.Linq;    
...
bool areEqual = firstArray.SequenceEqual(secondArray);
if (areEqual)
   Console.WriteLine("The two arrays are equal"); 
else 
   Console.WriteLine("The two arrays aren't equal");

看到NetFiddle

还有一个错字:您填充了两次firststarray。

    //fill it from console
    for (int counter = 0; counter <= sizeTwo - 1; counter++)
    {
        Console.Write("Please enter a value: ");
        // **Must be secondArray**
        firstArray[counter] = Int32.Parse(Console.ReadLine());
        //for test
        // Console.WriteLine(secondArray[counter]);
    }
相关文章：