爲什麼控制檯不斷爲我的數組中的元素寫入相同的輸出？

Question

我是C＃編程新手。我試圖創建新的對象（在我的案例StudentInfo對象），並將它們放入數組studentArr。

數組初始化的長度爲5，我想創建五個StudentInfo對象並將它們添加到數組中。我不認爲它是這樣做的，我不知道我哪裏會出問題。

我應該通過Console.Readline爲五個不同的學生輸入學生信息，它只打印出第一個學生信息。

我使用struct來訪問學生信息。

一些幫助將不勝感激！

static void Main(string[] args) 
{ 
    StudentInfo[] studentArr = new StudentInfo[5]; 

    int objectNumber = 0; 
    for (int i = 0; i < studentArr.Length; i++) 
    { 
     studentArr[i] = new StudentInfo(); 

     Console.WriteLine("Please enter StudentId, StudentName, CourseName, Date-Of-Birth"); 

     studentArr[i].firstName = Console.ReadLine(); 
     studentArr[i].lastName = Console.ReadLine(); 
     studentArr[i].birthDay = Console.ReadLine(); 
     studentArr[i].studentID = Console.ReadLine(); 
     studentArr[i].addressLine1 = Console.ReadLine(); 
     studentArr[i].addressLine2 = Console.ReadLine(); 
     studentArr[i].city = Console.ReadLine(); 
     studentArr[i].state = Console.ReadLine(); 
     studentArr[i].zipCode = Console.ReadLine(); 
     studentArr[i].country = Console.ReadLine(); 

     objectNumber = i + 1; 
    } 

    for (int i = 0; i < studentArr.Length; i++) 
    { 
     Console.WriteLine(
      "{0} {1} was born on {2}. Student ID: {3}", 
      studentArr[0].firstName, studentArr[0].lastName, 
      studentArr[0].birthDay, studentArr[0].studentID); 

     Console.WriteLine(
      "Address: {0} {1} \n\t {2} {3} {4} {5}.", 
      studentArr[0].addressLine1, studentArr[0].addressLine2, 
      studentArr[0].city, studentArr[0].state, studentArr[0].zipCode, 
      studentArr[0].country); 
    } 
} 

public struct StudentInfo 
{ 
    public string firstName; 
    public string lastName; 
    public string birthDay; 
    public string studentID; 
    public string addressLine1; 
    public string addressLine2; 
    public string city; 
    public string state; 
    public string zipCode; 
    public string country; 

    // Constructor for StudentInfo 
    public StudentInfo(
     string first, string last, string dob, string ID, 
     string address1, string address2, string city, 
     string state, string zip, string country) 
    { 
     this.firstName = first; 
     this.lastName = last; 
     this.birthDay = dob; 
     this.studentID = ID; 
     this.addressLine1 = address1; 
     this.addressLine2 = address2; 
     this.city = city; 
     this.state = state; 
     this.zipCode = zip; 
     this.country = country; 
    } 
} 

Answer 1

通過寫入studentArr [0]，只打印第一個元素爲0。它應該是studentArr [I]

for (int i = 0; i < studentArr.Length; i++) 
{ 

    Console.WriteLine("{0} {1} was born on {2}. Student ID: {3}", studentArr[i].firstName, studentArr[i].lastName, studentArr[i].birthDay, studentArr[i].studentID); 
    Console.WriteLine("Address: {0} {1} \n\t {2} {3} {4} {5}.", studentArr[i].addressLine1, studentArr[i].addressLine2, studentArr[i].city, studentArr[i].state, studentArr[i].zipCode, studentArr[i].country); 
}