1/9 배열 연습(학생)

 

  

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

namespace Study07
{
    class App
    {
        //생성자
        public App()
        {
            Console.WriteLine("App생성자");

            Student student0 = new Student();
            student0.id = 100;
            student0.name = "홍길동";
            student0.score = 89;

            Student student1 = new Student();
            student1.id = 101;
            student1.name = "임꺽정";
            student1.score = 92;

            Student student2 = new Student();
            student2.id = 102;
            student2.name = "장길산";
            student2.score = 78;

            

            Student[] students = new Student[5] {student0, student1, student2, null, null};

            int length = students.Length; //5
            //for(int i=0; i<length; i++)
            //{
            //    Console.WriteLine(i); //0,1,2,3,4 (index)
            //}

            for (int i = 0; i < length; i++)
            {
                Student student = students[i];
                //if (student == null) continue;
                //    Console.WriteLine("{0}{1}{2}", student.id, student.name, student.score);
                if(student != null)
                {
                    Console.WriteLine("{0}{1}{2}", student.id, student.name, student.score);
                }
            }

            foreach (Student student in students)
            {
                if(student != null)
                {
                    Console.WriteLine("{0}{1}{2}", student.id, student.name, student.score);
                }
            }


        }


    }
}

  

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

namespace Study07
{
    class Student
    {
        public int id;
        public string name;
        public int score;
        //생성자
        public Student()
        {

        }
    }
}