Question

我是编码的新手，所以我希望这很清楚......

我创建了两个新课程：学生和成绩册。他们的构造者如下：

Student(string studentName, string gradeBookTitle);

Gradebook(double testWeight, double quizWeight, 
          double assignmentWeight, string[] studentNameArray);

我想使用Gradebook.studentNameArray参数中的名称为每个名称初始化Student对象。这样，当用户创建成绩簿时，他们会自动为班级中的每个学生创建一个学生对象。

但是，我遇到了问题，因为您无法使用数组的内容来命名新变量。我假设我正在思考它......是否有更简单的方法来组织所有这些？或者在构造函数中创建这些学生变量的另一种方法是什么？

Answer 1

您可以使用Dictionary，Key是学生的姓名。有点像这样（在这里做一些假设，但希望这能告诉你基本的想法）：

public IDictionary<string, Student> StudentDictionary { get; set; }

public Gradebook(double testWeight, double quizWeight, 
                 double assignmentWeight, string[] studentNameArray) {

    StudentDictionary = new Dictionary<string, Student>();

    foreach (var name in studentNameArray) {
        StudentDictionary.Add(name, new Student(name, <age_here>, this.Title));
    }
}

Answer 2

用户..学生是否有其他构造函数或要在构造函数中设置哪些默认值。这样的事情可以做到。

class Gradebook
{
    public Gradebook(double testWeight, double quizWeight, double assignmentWeight, string[] studentNameArray)
    {
        this.TestWeight = testWeight;
        this.QuizWeight = quizWeight;
        this.AssingmentWeight = assignmentWeight;
        this.Students = new List<Student>();
        foreach(var name in studentNameArray)
            Students.Add(new Student(
                studentName: name, 
                age: 0,
                gradeBookTitle: ""
                )
            );
    }

    public double TestWeight { get; set; }

    public double QuizWeight { get; set; }

    public double AssingmentWeight { get; set; }

    public IList<Student> Students { get; set; }
}

class Student
{
    public Student(string studentName, int age, string gradeBookTitle)
    {

    }
}

Answer 3

您可以从studentNameArray中填充构造函数中Student类型的List。但是，现场年龄不会这样设定。如果您也想设置年龄，则需要返回并修改列表或将studentNameArray参数更改为List类型的参数。

private List<Student> _students;
private string _title;

public Gradebook(double testWeight, double quizWeight, 
          double assignmentWeight,  string[] studentNameArray)
{
    this._testWeight = testWeight;
    this._quizWeight = quizWeight;
    this._assignmentWeight = assignmentWeight;
    this._students = new List<Student>;

    foreach(var name in studentNameArray)
    {
        _students.Add(new Student(name, 0, this._title);
    }
}

创建一个类构造函数，根据参数初始化其他类型的对象变量（C＃）

3 个答案: