java - 如何制作pick 3彩票程序？ (java)

Question

在这里发表第一篇文章是因为我很沮丧。作业是创建一个程序，其中生成 0-9 的 3 个随机数，用户将输入 3 个数字。如果 1 个数字匹配，则用户赢得 10 美元，如果 2 个数字匹配，则赢得 100 美元，如果 3 个数字匹配，则赢得 1000 美元，如果全部 3 个数字匹配，则用户赢得 1000000 美元。由于某种原因，即使没有一个数字匹配，它也会奖励我 10 美元，并且还有其他问题。

我知道一定有更简单的方法。这是我的第一门 Java 类(class)，所以我仍然是初学者，但这是我想出的代码:

public class TheLottery
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);

        System.out.println("enter a number from 0-9");
        int num1 = input.nextInt();

        System.out.println("enter a second number from 0-9");
        int num2 = input.nextInt();

        System.out.println("enter a third number from 0-9");
        int num3 = input.nextInt();

        Random r=new Random();
        int a1=r.nextInt(10);

        Random r1=new Random();
        int a2=r.nextInt(10);

        Random r2=new Random();
        int a3=r.nextInt(10);

        System.out.println("The winning numbers are "+ a1 + a2 + a3);
        boolean winning1=true;
        boolean winning2=true;
        boolean winning3=true;

        if (num1 == a1 || num1 == a2 || num1 == a3)
            winning1 = true;
        else
            winning2 = false;

        if (num2 == a1 || num2 == a2 || num2 == a3)
           winning2 = true;
        else
           winning2 = false;

        if (num3 == a1 || num3 == a2 || num3 == a3)
            winning3 = true;
        else
            winning3= false;

        if(winning1==true && winning2==true && winning3==true && num1 == a1 && num2==a2 && num3==a3)
            System.out.println("YOU'RE A MILLIONAIRE!");
        else if (winning1==true && winning2==true && winning3==true)
            System.out.println("You win 1,000 dollars!");
        else if ((winning1==true && winning2==true) || (winning1==true && winning3==true) ||(winning2==true && winning3==true))
            System.out.println("You win 100 dollars!");
        else if (winning1==true || winning2==true || winning3==true)
            System.out.println("You win 10 dollars!");
        else
            System.out.println("You lose!");
    }
}

Answer 1

@Adam S 指出了第一个问题。您在第一次尝试检查时分配了错误的 boolean 变量。

如果从一开始就记录胜利，而不是成功的尝试，事情会更容易。

        int wins = 0;

        if (num1 == a1 || num1 == a2 || num1 == a3)
            wins++;
        if (num2 == a1 || num2 == a2 || num2 == a3)
            wins++;
        if (num3 == a1 || num3 == a2 || num3 == a3)
            wins++;

        if(wins == 3)
            if(num1 == a1 && num2==a2 && num3==a3)
                System.out.println("YOU'RE A MILLIONAIRE!");
            else
                System.out.println("You win 1,000 dollars!");
        else if (wins == 2)
            System.out.println("You win 100 dollars!");
        else if (wins == 1)
            System.out.println("You win 10 dollars!");
        else
            System.out.println("You lose!");