多项选择问卷

Question

我是C#新手，对于我的作业，我必须设计一个多项选择的问卷，让学生可以登录并参加考试，查看备忘录等。我不太关心GUI，而是我的类和代码的结构。我将使用StudentController类与GUI交互。这是一个粗略的，但这是我的代码到目前为止：

学生班

public class Student : User
{
    private int finalMark;
    private List<int> answers;

    public Student()
    {
        answers = new List<int>();
    }

    /// <summary>
    /// Gets the final mark for the student
    /// </summary>
    public int GetFinalMark() => finalMark;

    /// <summary>
    /// Sets the final mark for the student
    /// </summary>
    public void SetFinalMark(int value) => finalMark = value;

    /// <summary>
    /// Fetches the answer the student chose for the indexed question
    /// </summary>
    /// <param name="index">The index of the question to retrieve the student's answer from</param>
    /// <returns>The index of the answer the user chose</returns>
    public int GetAnswer(int index) => answers[index];

    /// <summary>
    /// Sets the answer at the index's position
    /// </summary>
    /// <param name="index">The index to set the answer at</param>
    /// <param name="answer">The answer to set</param>
    public void SetAnswer(int index, int answer) => answers[index] = answer;

    /// <summary>
    /// Adds an answer to the student's list of answered questions
    /// </summary>
    /// <param name="answer">The answer to add to the list of answered questions</param>
    public void AddAnswer(int answer) => answers.Add(answer);
}

多项选择题

public class MultipleChoiceQuestion
{
    //  The question that is stated in the multiple choice question
    private string question;

    //  The list of possible answers to the question
    private string[] choices;

    //  The index of the correct answer, ie. choices[answer]
    private int answer;

    public MultipleChoiceQuestion()
    {
        choices = new string[4];
    }

    /// <summary>
    /// Gets and sets the question
    /// </summary>
    public string Question { get => question; set => question = value; }

    /// <summary>
    /// Gets the indexed question as a string
    /// </summary>
    /// <param name="index"></param>
    /// <returns></returns>
    public string GetChoices(int index) => choices[index];

    /// <summary>
    /// Sets the choice at the current index, eg. choice[0] = "Static void"
    /// </summary>
    /// <param name="index">The index of the choice</param>
    /// <param name="value">The choice to set</param>
    public void SetChoice(int index, string value) => choices[index] = value;

    /// <summary>
    /// Gets and sets the correct answer as an index
    /// </summary>
    public int Answer { get => answer; set => answer = value; }
}

试题班

    public class Test
{
    private List<MultipleChoiceQuestion> question;

    public Test()
    {
        question = new List<MultipleChoiceQuestion>(); ;
    }

    /// <summary>
    /// Returns the question text at the given index of questions
    /// </summary>
    /// <param name="index">The index of the question to retrieve</param>
    /// <returns>A string of the question at the current index</returns>
    public string GetQuestionText(int index) => question[index].Question;


    public void SetQuestion(int index, string value) => question[index].SetChoice(index, value);

    /// <summary>
    /// Adds a new question to the list
    /// </summary>
    /// <param name="newQuestion">The question to add to the list</param>
    public void AddQuestion(MultipleChoiceQuestion newQuestion) => question.Add(newQuestion);

    /// <summary>
    /// Retries one of the choices for the question. Eg. choice A, choice B, choice C...
    /// </summary>
    /// <param name="choice">The index of the choice, eg. choice 2</param>
    /// <param name="index">The index of the question</param>
    /// <returns></returns>
    public string GetChoice(int choice, int index) => question[index].GetChoices(choice);

    /// <summary>
    /// Retrieves the index of the answer to the question
    /// </summary>
    /// <param name="questionIndex">The index of the answer</param>
    /// <returns></returns>
    public int GetAnswerIndex(int questionIndex) => question[questionIndex].Answer;

    /// <summary>
    /// Gets how many questions there are in the test
    /// </summary>
    /// <returns>The amount of questions in the test</returns>
    public int GetSize()
    {
        return question.Count;
    }
}

学生控制器

    public class StudentController
{
    private List<Student> students;
    private FileManager fileManager;
    private Test test;

    public StudentController()
    {
        students = new List<Student>();
        fileManager = new FileManager();
        test = new Test();
        Init();
    }

    private void Init()
    {
        students = fileManager.LoadStudents();
        test = fileManager.LoadTest();
    }

    /// <summary>
    /// Verifies that the login details match what is in the system
    /// </summary>
    /// <param name="username">The username of the student</param>
    /// <param name="password">The password of the student</param>
    /// <returns>True if the credentials match that on the system</returns>
    public bool CheckLogin(int username, string password)
    {
        bool credentialsMatch = false;
        foreach (Student student in students)
        {
            if (student.ID == username && student.Password == password)
            {
                credentialsMatch = true;
                break;
            }
        }
        return credentialsMatch;
    }

    /// <summary>
    /// Fetches the index of the student in a list
    /// </summary>
    /// <param name="ID">The ID of the student</param>
    /// <returns>The student's ID if found, else returns -1</returns>
    public int GetStudentIndex(int ID)
    {
        int id = -1;
        foreach (Student student in students)
        {
            if (student.ID == ID)
            {
                id = ID;
                break;
            }
        }
        return id;
    }

    /// <summary>
    /// Sets the final mark of the student
    /// </summary>
    /// <param name="studentIndex">The index of the student</param>
    /// <param name="mark">The final mark of the student</param>
    public void SetFinalMark(int studentIndex, int mark) => students[studentIndex].SetFinalMark(mark);

    /// <summary>
    /// Sets the answer of the student at the current index
    /// </summary>
    /// <param name="studentIndex">The index of the student</param>
    /// <param name="questionNumber">The question number</param>
    /// <param name="answer">The answer for the student</param>
    public void SetStudentAnswer(int studentIndex, int questionNumber, int answer) => students[studentIndex].SetAnswer(questionNumber, answer);

    /// <summary>
    /// Adds a new answer to the list of the student's answers
    /// </summary>
    /// <param name="studentIndex">The index of the student</param>
    /// <param name="answer">The answer to add</param>
    public void AddStudentAnswer(int studentIndex, int answer) => students[answer].AddAnswer(answer);

    /// <summary>
    /// Gets the text for the question
    /// </summary>
    /// <param name="questionNumber">The question number</param>
    /// <returns>A string of the question's text</returns>
    public string GetQuestionText(int questionNumber) => test.GetQuestionText(questionNumber);

    /// <summary>
    /// Fetches the choice of the question at the index
    /// </summary>
    /// <param name="choice">The index of the choice</param>
    /// <param name="questionNumber">The question number</param>
    /// <returns></returns>
    public string GetQuestionChoice(int choice, int questionNumber) => test.GetChoice(choice, questionNumber);


    /// <summary>
    /// Gets the answer to the question
    /// </summary>
    /// <param name="questionNumber">The question number</param>
    /// <returns>The answer to the question</returns>
    public int GetAnswer(int questionNumber)
    {
        return test.GetAnswerIndex(questionNumber);
    }

    /// <summary>
    /// Saves the students to file
    /// </summary>
    public void SaveStudents()
    {
        fileManager.SaveStudents(students);
    }
}

FileManger类只是将对象加载并保存到文件中。如有任何帮助或指导，将不胜感激！

Answer 1

让我困惑

学生有答案，但似乎与考试无关。

答案应该是特定于测试的。一个学生要么有多个测试，要么一个测试有一个用户。您可以有一个基类测试，它是原始测试，然后是一个继承自测试的testUser类。

MultipleChoiceQuestion应该有正确的答案，这样才能得分。

考试应该有分数的方法。

对get set方法使用公共属性。

你不需要名单上的一套。他们可以得到然后添加，修改和删除。

你可以像这样做新的，让它远离电脑。

private List<int> answers = new List<int>();  

C#有索引器。C#编程指南(使用索引器)