Question

我正在尝试模拟骰子游戏实验。目标是找到平均卷数，以获得相同的骰子值，以显示所需的连续卷数。

我的程序询问用户用户想要运行程序的次数。所以它会运行循环，然后在得到答案后停止，然后显示它所花费的数量。然后它将重复用户指定的次数。

我想从每个实验中取出totalThrows并将每个totalThrows加在一起，然后除以我的变量turns，以获得它所需的平均投掷量。

我在获取所有totalThrows的总和时遇到了一些麻烦。我只能得到最后一个totalThrow。如果你们中的任何人能就如何解决这个问题提出一些建议，我将不胜感激。我认为数组可以提供帮助，但我还没有在课堂上学过数组。

这是我的代码。

public static void main(String[] args) {
// WRITE main's CODE HERE 
    Scanner keyboard = new Scanner(System.in);
    Random randomNumber = new Random();

    int value, turns=0, nSides, rollLength; //declare variables
    int totalThrows=0, roll=0, count=0,finish=0;

    //ask for input
    System.out.println("Please enter the number of sides (2, 4, or 6): ");
        nSides = keyboard.nextInt();

    System.out.println("Enter the value sought. Must be in the range [1," + nSides + "]: ");
        value = keyboard.nextInt();

    System.out.println("Enter the length of the run.\n" + "Remember, the bigger it is the longer it will take to find it");
        rollLength = keyboard.nextInt();

    System.out.println("Enter number of times to run the experiment:"); 
        turns = keyboard.nextInt();

    System.out.println("\n");

    do
    {   
        //Countinue loop until count = rollLength
        while(count!=rollLength){  
            roll = randomNumber.nextInt(nSides)+1;  
            totalThrows++;        //will increment after every roll

            //When roll comes up as a watched value I want to increment count by one
            if(roll==value){  
            count++;    //This should stop until count is my rollLength
            }
            else if (roll!=value){  //When an unwanted roll comes up start over
            count=0;
            }
        }
        //finish counts how many times the experiment was successful
        if (count==rollLength){
            finish++;             
        }
           System.out.println("\n"); 

           //Display totalThrows it took until rollLength variable occurs
           System.out.println("Your total rolls is: "+ totalThrows);  
    } while(finish!=turns);  //This will repeat the experiment
}

}

Answer 1

简单地在顶部声明另一个变量：

int averageThrows = 0;

每次循环结束时添加到此值：

do {
    // ...
    averageThrows += totalThrows;
} while( finish != turns );

然后除以转数：

averageThrows /= turns;

那应该为你做。

试图找到骰子游戏的平均投掷

1 个答案: