학생들 관리하는 방법(클래스 배열 사용)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Study07
{
    class Students
    {
        string[] names = { "김동준", "이환국", "홍길동", "재갈량", "조조" };
        int[] ids = { 20230109, 20230110, 20230111, 20230112, 20230113 };
        int[] scores = { 100, 90, 56, 75, 11 };
        //생성자
        public Students()
        {
            
        }
        public void StudentsList()
        {
            foreach (string name in names)
            {
                Console.Write(name);
            }         
            foreach (int id in ids)
            {
                Console.Write(id);               
            }
            foreach (int score in scores)
            {
                Console.Write(score);
            }
            
           
        }

    }
}

문제점 : 학생"들' 이 데이터를 가지고 있다

 

내가 풀은 방법

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Study07
{
    class App
    {
        //생성자
        public App()
        {

            Student student0 = new Student();
            student0.id = 20230109;
            student0.name = "홍길동";
            student0.score = 89;

            Student student1 = new Student();
            student1.id = 20230109;
            student1.name = "임꺽정";
            student1.score = 89;

            Student student2 = new Student();
            student2.id = 20230109;
            student2.name = "장길산";
            student2.score = 89;


            Student[] students = {student0, student1, student2};


            foreach (Student student in students)
            {
                Console.WriteLine("학번 : {0}",student.id);                
                Console.WriteLine("학생이름 : {0}", student.name);                
                Console.WriteLine("점수 : {0}", student.score);
                Console.WriteLine();

            }


        }
    }
}

for 문 추가

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Study07
{
    class App
    {
        //생성자
        public App()
        {

            Student student0 = new Student();
            student0.id = 20230109;
            student0.name = "홍길동";
            student0.score = 89;

            Student student1 = new Student();
            student1.id = 20230109;
            student1.name = "임꺽정";
            student1.score = 89;

            Student student2 = new Student();
            student2.id = 20230109;
            student2.name = "장길산";
            student2.score = 89;


            Student[] students = {student0, student1, student2,null,null};


            //foreach (Student student in students)
            //{
            //    if (student != null)
            //    {
            //        Console.WriteLine("학번 : {0}", student.id);
            //        Console.WriteLine("학생이름 : {0}", student.name);
            //        Console.WriteLine("점수: {0}",student.score);
            //        Console.WriteLine();
            //    }
            //    else
            //        return;
           
            //}

            for (int i = 0; i <= students.Length; i++)
            {
                if (students[i] != null)
                {
                    Console.WriteLine("학번 : {0}", students[i].id);
                    Console.WriteLine("학생이름 : {0}", students[i].name);
                    Console.WriteLine("점수 : {0}", students[i].score);
                }                   

                else
                    return;
            }


        }
    }
}