학생 성적표를 List로 오름차순 내림차순 표시

 

이름은 오름차순, 과목은 내림차순 동점자는 이름(오름차순)으로 설정

class ListPrac     {         static void Main(string[] args)         {             List<Grade> myAL = new List<Grade>();             string line;             StreamReader file = new StreamReader("List_Sample.txt");             while ((line = file.ReadLine()) != null)             {                 string[] words = line.Split('\t');                 Grade userGrade = new Grade(words[0], Convert.ToInt32(words[1]), Convert.ToInt32(words[2]), Convert.ToInt32(words[3]));                 myAL.Add(userGrade);             }             file.Close();             while (true)             {                 string strLine = Console.ReadLine();                 switch(strLine)                 {                     case "PRINT": // 이름 순 출력                         myAL.Sort((Grade x, Grade y) => x.Name.CompareTo(y.Name));                         break;                     case "KOREAN": // 국어 성적 순 출력                          // Lambda식                         myAL.Sort((Grade x, Grade y) => x.Korean == y.Korean ? x.Name.CompareTo(y.Name) : y.Korean - x.Korean);                         break;                     case "ENGLISH": // 영어 성적 순 출력                         // delegate                         myAL.Sort(delegate (Grade x, Grade y)                         {                             if (y.English == x.English)                             {                                 return x.Name.CompareTo(y.Name);                             }                             else                             {                                 return y.English.CompareTo(x.English);                             }                         });                         break;                     case "MATH": // 수학 성적 순 출력                         // comparer                         myAL.Sort(compare);                         break;                     case "QUIT": // 종료                         return;                      default:                         break;                 }                 foreach (Grade obj in myAL)                 {                     Console.WriteLine("{0}\t{1}\t{2}\t{3}", obj.Name, obj.Korean, obj.English, obj.Math);                 }             }         }         static int compare(Grade x, Grade y)         {             if (x.Math == y.Math)                 return x.Name.CompareTo(y.Name);             else                 return y.Math - x.Math;         }     }     public class Grade     {         private String name;         private int korean;         private int english;         private int math;         public Grade(string str, int k, int e, int m)         {             Name = str;             Korean = k;             English = e;             Math = m;         }         public string Name { get => name; set => name = value; }         public int Korean { get => korean; set => korean = value; }         public int English { get => english; set => english = value; }         public int Math { get => math; set => math = value; }     }