Question

我刚刚启动了java，所以这可能非常简单，但是我的班级中有4个人无法弄清楚这段代码有什么问题。我担心它可能是扫描仪和随机命令之间的重叠问题，因为.nextInt（）是用于获取新输入并在0和n之间创建随机变量的命令。此外，我相当新的Stackoverflow所以如果有任何程序即将打破我应该尝试在将来适应，id很乐意接受你的建议。

感谢您提前帮助...干杯

import java.util.Scanner;
import java.util.Random;

public class Question4 {
public static void main(String arg[]){
    //-----------------------------

    int numdice;
    int sides;
    int count = 1;
    int score;
    int total = 0;
    boolean loop = false;
    Scanner scan = new Scanner(System.in);
    Random random = new Random();


    System.out.print("Enter how many dice you would like to roll:");
    numdice = scan.nextInt();

    System.out.println("Enter how many sides to the dice there will be:");
    sides =  scan.nextInt();

    System.out.println("You have rolled " + numdice + " dice with " + sides + " sides and have received the following values for each roll:");

    while (!loop) {
        if (numdice <= count){
            score = random.nextInt(sides -1 ) +1;
            total += score;
            System.out.print(score);
            ++count;
        }
        else
        {
            System.out.println();
            System.out.print(" your total value for your dices rolls are " + total);
            loop = true;
        }
    }
    System.out.println();


    //-----------------------------
}

}

编辑：症状是程序运行但不创建/打印随机变量的任何值。该程序将打印else语句，但它声称总值= 0.根据Eclipse，程序中没有错误或错误。还要感谢你关于空格的说明。

你们是对的，照顾它。多么愚蠢涂料。谢谢seth和paku！我会评价你，但它不会让我。无论如何都要度过美好的一天！

Answer 1

你的if语句是倒退的。 if (count <= numdice)

import java.util.Scanner;
import java.util.Random;

public class Question4 {
public static void main(String arg[]){
    //-----------------------------

    int numdice;
    int sides;
    int count = 1;
    int score;
    int total = 0;
    boolean loop = false;
    Scanner scan = new Scanner(System.in);
    Random random = new Random();


    System.out.print("Enter how many dice you would like to roll:");
    numdice = scan.nextInt();

    System.out.println("Enter how many sides to the dice there will be:");
    sides =  scan.nextInt();

    System.out.println("You have rolled " + numdice + " dice with " + sides + " sides and have received the following values for each roll:");

    while (!loop) {
        if (count <= numdice){
            score = random.nextInt(sides -1 ) +1;
            total += score;
            System.out.print(score + " ");  //Also, easier to read with a space.
            ++count;
        }
        else
        {
            System.out.println("Your total value for your dices rolls are " + total);
            loop = true;
        }
    }
    System.out.println();


    //-----------------------------
}

}

Answer 2

使用扫描程序和随机对象中的nextInt()时应该没有问题。这些方法属于两个完全不同的类。

我认为你的while循环中的if语句有点倒退。你想掷骰子数量，是吗？因为现在你正在测试numdice是否小于你的掷骰数。这是你想要的吗？

if (count <= numdice){

Answer 3

将if（numdice＆lt; = count）改为if（numdice＆gt; = count），你会得到答案......

你可以在同一个类中使用.nextInt（）for Java.util.Random和Java.util.Scanner吗？

3 个答案: