java - 简单的数学游戏

Question

这是我的第一个问题，请耐心等待:-)我尝试编写非常简单的 Java 游戏。首先，我想生成一个示例任务，例如“2+2 =”。用户必须回答结果是什么。接下来我想生成一个字符和其他随机数。

2 +2 = (4) if answer == result, than generate random char nad number 4 - 1 = (3) if answer == result, than generate random char nad number 3 + 5 = (9)

目前我陷入了角色生成的困境。

import java.util.Random;


public class Main {
    public static void main(String[] args) {
        Random randomNumber = new Random();
        int userRandomNumber = randomNumber.nextInt(10) - 1;
        int myRandomNumber = randomNumber.nextInt(10) - 1;
        int i = giveResult(userRandomNumber, myRandomNumber);
        System.out.println(userRandomNumber);
        System.out.println(myRandomNumber);
        System.out.println(i);

    }

    public static int giveResult(int userRandomNumber, int myRandomNumber) {

        Random randomNumber2 = new Random();
        int switchRandomNumber = randomNumber2.nextInt(2);
        char operatorRandom = '+';
        int result = 0;

        switch (switchRandomNumber) {
            case 1:
                operatorRandom = '+';
                result = userRandomNumber + myRandomNumber;
                //return result;
                break;
            case 2:
                operatorRandom = '-';
                result = userRandomNumber - myRandomNumber;
                //return result;
                break;
            default:
                result = 0;

        }
        return result;
    }
}

如何更正我的代码以及后续步骤做什么？

问候!

Answer 1

您使该程序变得比实际需要的更加复杂。

实现您的目标(或至少我认为您的目标)的最简单方法如下:

public static void main(String[] args) {
        Random rand = new Random();
        int NumberOfAnswers = addOrSubtract.length;
        int pick = rand.nextInt(NumberOfAnswers);       
        choice = addOrSubtract[pick];
        int randomNumber1 = rand.nextInt(10);
        int randomNumber2 = rand.nextInt(10);
        if (choice == "+") {
            answer = randomNumber1 + randomNumber2; 
        } else {
            answer = randomNumber1 - randomNumber2; 
        }
        System.out.println(randomNumber1 + " " + choice + " " + randomNumber2 + " = ");
        Scanner input = new Scanner(System.in);
        int inputAnswer = input.nextInt();
        if (inputAnswer == answer) {
            System.out.println("Correct! The answer was: " + answer);
            main(null);
        } else {
            System.out.println("Incorrect. The answer was: " + answer);
            System.out.println("Good-Bye!");
            System.exit(0);
        }
        input.close();
 } 

注意:我几乎完全重新完成了您的程序，因此如果您对任何内容有任何疑问，请在下面评论。