我不能添加信息作爲一個數組在我的班學生

Question

我做了一類學生有一個參數課程和成績，這是數組，但當我嘗試添加一個學生，它不允許我輸入數組中的細節我只麪包車只輸入一個詞或數字

Student s1 = new Student(dev, 1691676, "eng,maths", 50); 

這裏是代碼

public class Student 
    { 
    public string name; 
    public int studentId; 
    public string[] courses; 
    public int[] grades ; 


    public Student(string name,int studentId,string[] courses,int[] grades) 
    { 
     this.name = name; 
     this.studentId = studentId; 
     this.courses = courses; 
     this.grades = grades; 

    } 
    public void info() 
    { 
     Console.WriteLine("name of the student is" + name); 
     Console.WriteLine("StudentID of the student is" + studentId); 
     Console.WriteLine("courses taken by student are" + courses); 
     Console.WriteLine("grades earned by the student are" + grades); 

    } 
    public void sleep() 
    { 
     Console.WriteLine("enter the amount of time the student slept"); 
     int sleep=Convert.ToInt32(Console.ReadLine()); 
     int a = grades.Length; 
     int b = 0; 
     if (b<a) 
     { 
      grades[b] = grades[b] - (sleep/10); 
     }  
    } 
    } 

Answer 1

您必須添加一個陣列，string[]，不是一個單一的string;但你可以Split字符串爲數組：

// As aquinas noticed, grades is an array as well as courses 
Student s1 = new Student(dev, 1691676, "eng,maths".Split(','), new int[] {50}); 

或提供數組作爲它的預期：

Student s1 = new Student(dev, 1691676, new string[] {"eng", "maths"}, new int[] {50});