如何select 随机数数组的多个值

Question

我正在创建一个骰子程序来进一步学习。该程序将掷出 5 个骰子并将随机数值分配给 5 的数组并打印出这些值。之后，我希望玩家 select 他或她想要保留的一个或多个骰子，显示这些值，稍后我将创建一个方法来掷剩余的骰子。

我在 select 多个骰子部分遇到问题。

这是我目前拥有的：

    using System;


class HelloWorld {

  static void Main() {

    Random random = new Random();

    int[] diceEach = new int[5];


    int diceCount = 1;

    for(int i = 0; i < 5; i++)
    {
        diceEach[i] = random.Next(1, 7);
        Console.WriteLine("Dice " + diceCount +": " + diceEach[i]);
        diceCount++;
    }
    Console.WriteLine("To roll again hit R");

    Console.WriteLine("Please type the dice numbers that you would like to keep...");
    string diceKept = Console.ReadLine();

        if(diceKept == "1")
        {
            Console.Write(diceEach[0]);
        }

        else if(diceKept == "1")
        {
            Console.WriteLine(diceEach[1]);
        }

        else if(diceKept == "3")
        {
            Console.WriteLine(diceEach[2]);
        }

        else if(diceKept == "4")
        {
            Console.WriteLine(diceEach[3]);
        }

        else if(diceKept == "5")
        {
            Console.WriteLine(diceEach[4]);
        }

        else if(diceKept == "r")
        {
            Console.WriteLine("You have chosen to roll again");
        }


    Console.ReadLine();

  }

}

我目前打印出一个骰子值，您 select 但我不确定如何打印出多个 select 离子。我能想到的唯一方法是输入所有选项。但这似乎不对，会使我的代码变长。

我在想某种循环可能有用吗？但我知道怎么做。

这是我第一次在这里发帖，希望我做对了。提前致谢！

Answer 1

您可以通过让用户输入他选择的骰子并用逗号“,”分隔它们来获得多个用户选择，例如

1,2,5

然后展开代码

string diceKept = Console.ReadLine();

try{
    int[] selectedDices = diceKept.Split(',').Select(x => int.Parse(x)).ToArray();
}catch{
//invalid input - string value could not be parsed to int value.
}

您可以在函数中使用 try-catch 块，如果没有抛出错误，则继续您的工作，否则重试输入所选值。

Answer 2

您可以解决的另一种方法是循环，直到用户完成选择要保留的骰子并希望使用 do...while 循环重新掷骰子。

        string diceKept;
        do
        {
            Console.WriteLine("Please type the dice number that you would like to keep...and type 'r' to when finished to re-roll remaining dice");
            diceKept = Console.ReadLine();

            if(int.TryParse(diceKept, out var diceNumber))
            {
                // I am making an assumption here that the user will always input a number between 1-6.
                // It would be best to put some logic to catch that scenario though.
                Console.WriteLine(diceEach[diceNumber - 1]);
            }

        } while (diceKept.ToLower() != "r");

        Console.WriteLine("Now re-rolling the rest....");
        // Do some re-relling stuff here.
        Console.Read()

如何select 随机数数组的多个值

How can select multiple values of an array of random numbers

c#

arrays

random

dice