Question

这是我在这里的第一篇文章，如果这是一个偏离主题的主题，或者我对细节的介绍很粗糙，请提前道歉。我正在自学Java并写了一些代码来试验定义一个引用类型和作用于它的方法，虽然它有效，但我不知道是否有更好，更有效的方法来完成我所做的事情。我想要至少一个返回值的方法（这里检查问题的答案是否正确），并使用静态变量来跟踪在生成多个类实例的过程中发生的事情（这里跟踪回答的问题数量）并且数字正确回答）。该代码生成一个分区问题的测验。

以下是代码，也发布在GitHub：

使用除数btw 5和14以及商btw 2和11定义引用类型DivisionProblem，使用方法生成问题的值，在控制台中说明问题（如果有帮助，我使用Eclipse），检查答案是否正确，采取正确和错误的答案，并追踪整体表现：

import java.util.Random;

class DivisionProblem {

    int dividend, divisor, quotient;
    static int answered=0, answeredRight=0;

    void generate() {
        Random myRandom = new Random();
        divisor = myRandom.nextInt(10) + 5;
        quotient = myRandom.nextInt(10) + 2;
        dividend=divisor*quotient;
    }
    void stateProblem() {
        System.out.print("What is " + dividend + " divided by " + quotient + "?");
    }
    boolean checkAnswerTF(int answer) {
        return answer == divisor;
    }
    void rightAnswer() {
        ++answered;
        ++answeredRight;
        System.out.println("That's right!");
    }
    void wrongAnswer() {
        ++answered;
        System.out.println("No, the answer is "+ divisor);          
    }
    void statePerformance() {
        System.out.print("You have answered " + answeredRight + " of " + answered + " questions correctly. ");
    }
}

这是使用DivisionProblem类型的类：

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

public class DivisionQuiz {

    public static void main(String[] args) {

        char reply;
        Scanner keyboard = new Scanner(System.in);
        DivisionProblem aDivisionProblem;

        do {
            aDivisionProblem = new DivisionProblem();           
            aDivisionProblem.generate();
            aDivisionProblem.stateProblem();
            if (aDivisionProblem.checkAnswerTF(keyboard.nextInt())) {
                aDivisionProblem.rightAnswer();
            }   else    {
                aDivisionProblem.wrongAnswer();
            };
            aDivisionProblem.statePerformance();

            System.out.println("Another problem? Type Y for yes.");
            reply = keyboard.findWithinHorizon(".", 0).charAt(0);

        } while (reply == 'Y'||reply == 'y');       
        keyboard.close();
    }
}

以下是示例输出：

What is 112 divided by 8?14
That's right!
You have answered 1 of 1 questions correctly. Another problem? Type Y for yes.
y
What is 80 divided by 8?10
That's right!
You have answered 2 of 2 questions correctly. Another problem? Type Y for yes.
y
What is 130 divided by 10?12
No, the answer is 13
You have answered 2 of 3 questions correctly. Another problem? Type Y for yes.
y
What is 21 divided by 3?7
That's right!
You have answered 3 of 4 questions correctly. Another problem? Type Y for yes.
n

欢迎提出任何改进建议。我正在考虑学习JavaFX并将其从Eclipse控制台中取出来。

批评我简单的Java测验程序

0 个答案: