122 lines
4.8 KiB
C#
122 lines
4.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace DT1 {
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public delegate double GradeCalc(List<int> s);
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public enum GradeLevel { FirstYear = 1, SecondYear, ThirdYear, FourthYear };
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public class Student {
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public string FirstName { get; set; }
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public string LastName { get; set; }
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public int ID { get; set; }
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public GradeLevel Year;
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public List<int> ExamScores;
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public double Grade { get; set; }
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}
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public class StudentClass {
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public Func<Student, string, bool> studentSelector = (student, surname) =>
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{
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return string.Compare(student.LastName, surname, true) == 0;
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};
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public GradeCalc gradeCalculator = (grades) =>
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{
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return Math.Round(((grades.Average() / 100 * 5) + 1) * 2, MidpointRounding.AwayFromZero) / 2;
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};
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public Func<Student, bool> passedSelector = (student) =>
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{
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return student.Year == GradeLevel.FourthYear && student.Grade >= 4;
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};
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#region data
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public List<Student> students = new List<Student> {
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new Student {FirstName = "Terry", LastName = "Adams", ID = 120,
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Year = GradeLevel.SecondYear,
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ExamScores = new List<int>{ 99, 82, 81, 79}},
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new Student {FirstName = "Fadi", LastName = "Fakhouri", ID = 116,
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Year = GradeLevel.ThirdYear,
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ExamScores = new List<int>{ 99, 86, 90, 94}},
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new Student {FirstName = "Hanying", LastName = "Feng", ID = 117,
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Year = GradeLevel.FirstYear,
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ExamScores = new List<int>{ 93, 92, 80, 87}},
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new Student {FirstName = "Cesar", LastName = "Garcia", ID = 114,
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Year = GradeLevel.FourthYear,
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ExamScores = new List<int>{ 97, 89, 85, 82}},
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new Student {FirstName = "Debra", LastName = "Garcia", ID = 115,
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Year = GradeLevel.ThirdYear,
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ExamScores = new List<int>{ 35, 72, 91, 70}},
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new Student {FirstName = "Hugo", LastName = "Garcia", ID = 118,
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Year = GradeLevel.SecondYear,
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ExamScores = new List<int>{ 92, 90, 83, 78}},
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new Student {FirstName = "Sven", LastName = "Mortensen", ID = 113,
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Year = GradeLevel.FirstYear,
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ExamScores = new List<int>{ 88, 94, 65, 91}},
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new Student {FirstName = "Claire", LastName = "O'Donnell", ID = 112,
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Year = GradeLevel.FourthYear,
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ExamScores = new List<int>{ 75, 84, 91, 39}},
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new Student {FirstName = "Svetlana", LastName = "Omelchenko", ID = 111,
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Year = GradeLevel.SecondYear,
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ExamScores = new List<int>{ 97, 92, 81, 60}},
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new Student {FirstName = "Lance", LastName = "Tucker", ID = 119,
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Year = GradeLevel.ThirdYear,
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ExamScores = new List<int>{ 68, 79, 88, 92}},
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new Student {FirstName = "Michael", LastName = "Tucker", ID = 122,
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Year = GradeLevel.FirstYear,
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ExamScores = new List<int>{ 94, 92, 91, 91}},
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new Student {FirstName = "Eugene", LastName = "Zabokritski", ID = 121,
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Year = GradeLevel.FourthYear,
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ExamScores = new List<int>{ 96, 85, 91, 60}}
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};
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#endregion
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public List<Student> AddGrades(GradeCalc calc) {
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foreach (Student s in students) {
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s.Grade = calc(s.ExamScores);
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}
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return students;
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}
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public List<Student> SearchStudent(Func<Student, string, bool> select, String lastName) {
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List<Student> result = new() { };
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foreach (Student s in students) {
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if (select(s, lastName)) result.Add(s);
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}
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return result;
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}
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public IEnumerable<Student> QueryPassed(Func<Student,bool> passed)
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{
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return students.Where(passed);
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}
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static void show(String titel, List<Student> students) {
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Console.WriteLine(titel);
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foreach (var item in students) {
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Console.WriteLine(String.Format("{0} {1} {2}", item.FirstName, item.LastName, item.Grade));
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}
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}
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public static void Main(string[] args) {
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StudentClass sc = new StudentClass();
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show("Grades", sc.AddGrades(sc.gradeCalculator));
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show("\nStudent Carcia",sc.SearchStudent(sc.studentSelector, "Garcia"));
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show("\nPassed 4th", sc.QueryPassed(sc.passedSelector).ToList<Student>());
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// Keep the console window open in debug mode.
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Console.WriteLine("Press any key to exit");
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Console.ReadKey();
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}
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}
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public static class ListUtils {
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public static IEnumerable<T> What<T>(this IList<T> list, Func<T, bool> selector)
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{
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return list.Where(selector);
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}
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}
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}
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