Question

我正在制作一个瓶子收集程序。我正在输入4个房间的瓶子收集，当用户输入退出时，会显示房间收集的瓶子清单，并选择获胜者。我的代码现在选择了最高记录瓶数，但我希望它显示具有该瓶数的房间号。如何更改我的代码以使其正常工作？

namespace BottleDrive
{
    class Program
    {
        static void Main(string[] args)
        {   //Initialize loop rooms to 4
            int[] rooms = new int[4];
            //Start of while loop to ask what room your adding into. 
            while (true)
            {
                Console.Write("Enter the room you're in: ");
                //If user enters quit at anytime, the code will jump out of while statement and enter for loop below
                string quit = Console.ReadLine();
                if (quit == "quit")
                    //Break statement separates embedded statement and is needed inorder to allow 
                    break; 


                //Variable room holds the number of bottles collect by each room. 
                int room = int.Parse(quit);
                Console.Write("Bottles collected in room {0}: ", room);
                // This line adds the count of bottles and records it so you can continuously count the bottles collected.
                rooms[room - 1] += int.Parse(Console.ReadLine());
            }
            //This for statement lists the 4 rooms and their bottle count when the user has entered quit.
            for (int i = 0; i < rooms.Length; ++i)
                Console.WriteLine("Bottles collected in room {0} = {1}", i + 1, rooms[i]);

            Console.WriteLine("And the Winner is room " + rooms.Max().ToString() + "!!!");
        }
    }
}

Answer 1

试试这个：

        int maxValue = 0;
        int maxRoomNumber = 0;
        for (int i = 0; i < rooms.Length; ++i)
        {
            if (rooms[i] > maxValue)
            {
                maxValue = rooms[i];
                maxRoomNumber = i + 1;
            }
            Console.WriteLine("Bottles collected in room {0} = {1}", i + 1, rooms[i]);
        }

        Console.WriteLine("And the Winner is room " + maxRoomNumber + "!!!");

Answer 2

你对rooms.Max()的使用很接近，只是它会返回最大值并且你想要索引。

您可以使用简单的for循环来查找索引。否则，你could go with an elegant "LINQ" method。

注意：不要忘记允许多个房间具有相同最大值的情况！

Answer 3

我想知道为什么LINQ没有包含IndexOf（）扩展名。我最终编写了自己的项目：

public static class Extensions
{
    public static int IndexOf<T>(this IEnumerable<T> items, Predicate<T> predicate)
    {
        int index = 0;
        foreach (T item in items)
        {
            if (predicate(item))
                break;
            index++;
        }

        return index;
    }

    public static int IndexOf<T>(this IEnumerable<T> items, T value)
    {
        int index = 0;
        foreach (T item in items)
        {
            if (item.Equals(value))
                break;
            index++;
        }

        return index;
    }
}

你可以这样做：

Console.WriteLine("And the Winner is room " + rooms.IndexOf(rooms.Max()));

如何选择记录号最高的阵列号？

3 个答案: