Question

我正在尝试设计一个彩票游戏，您可以选择2个单位数字，然后将它们与随机数字进行比较。我将从我的教授给我的代码示例开始，并尝试调整它以使用它。我不知道如何让它运行或我有什么错误。

import java.util.Scanner;

public class Lottery {

    private static Scanner input;

    public static void main(String[] args) {
        String lottery = "" + (int) (Math.random() * 10);
        String lottery1 = "" + (int) (Math.random() * 10);

        input = new Scanner(System.in);
        System.out.print("Enter your first single digit guess: ");
        String guess = input.nextLine();
        System.out.print("Enter your second single digit guess: ");
        String guess1 = input.nextLine();

        int lotteryDigit1 = lottery.charAt(0);
        int lottery1Digit1 = lottery.charAt(1);

        int guessDigit1 = guess.charAt(0);
        int guess1Digit1 = guess1.charAt(1);

        System.out.println("The lottery number is " + lottery);

        if (guess.equals(lottery))
            System.out.println("Exact match: you win $10,000");
        else if (guess1Digit1 == lotteryDigit1
                && guessDigit1 == lottery1Digit1)
            System.out.println("Match all digits: you win $3,000");
        else if (guessDigit1 == lotteryDigit1
                || guessDigit1 == lottery1Digit1
                || guess1Digit1 == lotteryDigit1
                || guess1Digit1 == lottery1Digit1)
            System.out.println("Match one digit: you win $1,000");
        else
            System.out.println("Sorry, no matches");
    }
}

Answer 1

我只能称这种方法来处理这个程序的功能＆＃34;有趣＆＃34;。但是，您需要添加以下更改：

import java.util.Scanner;

public class Lottery {

   private static Scanner input;

   public static void main(String[] args) {
      String lottery = "" + ((int) (Math.random() * 10)) + ((int) (Math.random() * 10));

      input = new Scanner(System.in);
      System.out.print("Enter your two digit guess: ");
      String guess = input.nextLine();

      int lotteryDigit1 = lottery.charAt(0);
      int lottery1Digit1 = lottery.charAt(1);

      int guessDigit1 = guess.charAt(0);
      int guess1Digit1 = guess.charAt(1);

      System.out.println("The lottery number is " + lottery);

      if (guess.equals(lottery))
         System.out.println("Exact match: you win $10,000");
      else if (guess1Digit1 == lotteryDigit1
             && guessDigit1 == lottery1Digit1)
         System.out.println("Match all digits: you win $3,000");
      else if (guessDigit1 == lotteryDigit1
           || guessDigit1 == lottery1Digit1
           || guess1Digit1 == lotteryDigit1
           || guess1Digit1 == lottery1Digit1)
         System.out.println("Match one digit: you win $1,000");
      else
         System.out.println("Sorry, no matches");
   }
}

原始程序的问题在于它忘记将彩票和彩票1浓缩为彩票，我补充说，它选择单独取数字，这是非常低效的。现在，两者都是两位数字，系统的其余部分保持不变。现在简化了代码用于其目的。

Answer 2

考虑这个相当简化的代码

    // uses java.util.Random
    Random rand = new Random ();
    Scanner scan = new Scanner (System.in);

    int guess1 = rand.nextInt(10);
    int guess2 = rand.nextInt(10);

    System.out.println("Enter number 1");
    int myGuess1 = scan.nextInt();
    System.out.println("Enter number 2");
    int myGuess2 = scan.nextInt();

    System.out.printf("Random1 %d Random2 %d Guess1 %d Guess2 %d", 
                                      guess1, guess2, myGuess1, myGuess2);

我会将比较留给您

2个单位数的彩票游戏，找不到我错的地方

2 个答案: