CSharp_肖裕杰_笃实44

Homework/Program.cs

@@ -1,4 +1,4 @@
-// See https://aka.ms/new-console-template for more information
+// See https://aka.ms/new-console-template for more information
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -9,43 +9,58 @@ namespace StudentManagementSystem
     public enum Grade
     {
         // TODO: 定义成绩等级 F(0), D(60), C(70), B(80), A(90)
-
+        F = 0,
+        D = 60,
+        C = 70,
+        B = 80,
+        A = 90
     }
 
     // 泛型仓储接口
     public interface IRepository<T>
     {
         // TODO: 定义接口方法
-        // Add(T item)
-        // Remove(T item) 返回bool
-        // GetAll() 返回List<T>
-        // Find(Func<T, bool> predicate) 返回List<T>
+        void Add(T item);
+        bool Remove(T item);
+        List<T> GetAll();
+        List<T> Find(Func<T, bool> predicate);
 
     }
 
     // 学生类
     public class Student : IComparable<Student>
     {
         // TODO: 定义字段 StudentId, Name, Age
-
-
+        public string StudentId;
+        public string Name;
+        public int Age;
+
+
         public Student(string studentId, string name, int age)
         {
             // TODO: 实现构造方法，包含参数验证（空值检查）
-
+            if (string.IsNullOrWhiteSpace(studentId))
+                throw new ArgumentException("学号不能为空", nameof(studentId));
+            if (string.IsNullOrWhiteSpace(name))
+                throw new ArgumentException("姓名不能为空", nameof(name));
+            if (age <= 0)
+                throw new ArgumentException("年龄必须大于0", nameof(age));
+            StudentId = studentId;
+            Name = name;
+            Age = age;
         }
 
         public override string ToString()
         {
-            // TODO: 返回格式化的学生信息字符串
-
+            return $"学号: {StudentId}, 姓名: {Name}, 年龄: {Age}";
         }
 
         // TODO: 实现IComparable接口，按学号排序
         // 提示：使用string.Compare方法
         public int CompareTo(Student? other)
         {
-
+            if (other == null) return 1;
+            return string.Compare(StudentId, other.StudentId, StringComparison.Ordinal);
         }
 
         public override bool Equals(object? obj)
@@ -63,18 +78,24 @@ public override int GetHashCode()
     public class Score
     {
         // TODO: 定义字段 Subject, Points
-
-
+        string Subject;
+        public double Points;
+
         public Score(string subject, double points)
         {
             // TODO: 实现构造方法，包含参数验证
-
+            if (string.IsNullOrWhiteSpace(subject))
+                throw new ArgumentException("科目不能为空", nameof(subject));
+            if (points < 0 || points > 100)
+                throw new ArgumentException("分数必须在0-100之间", nameof(points));
+            Subject = subject;
+            Points = points;
         }
 
         public override string ToString()
         {
             // TODO: 返回格式化的成绩信息
-
+            return $"{Subject}: {Points:F1}";
         }
     }
 
@@ -83,7 +104,7 @@ public class StudentManager : IRepository<Student>
     {
         // TODO: 定义私有字段存储学生列表
         // 提示：使用List<Student>存储
-
+        List<Student> students = new List<Student>();
 
         public void Add(Student item)
         {
@@ -96,69 +117,122 @@ public void Add(Student item)
         public bool Remove(Student item)
         {
             // TODO: 实现Remove方法
-
+            if (item == null)
+                throw new ArgumentNullException(nameof(item));
+            if (students.Contains(item))
+                students.Remove(item);
+            else
+                return false;
+            return true;
         }
 
         public List<Student> GetAll()
         {
             // TODO: 返回学生列表的副本
-
+            return new List<Student>(students);
         }
 
         public List<Student> Find(Func<Student, bool> predicate)
         {
             // TODO: 使用foreach循环查找符合条件的学生
-
+            List<Student> result = new List<Student>();
+            foreach (var student in students)
+            {
+                if (predicate(student))
+                    result.Add(student);
+            }
+            return result;
         }
 
         // 查找年龄在指定范围内的学生
         public List<Student> GetStudentsByAge(int minAge, int maxAge)
         {
             // TODO: 使用foreach循环和if判断实现年龄范围查询
-
+            List<Student> result = new List<Student>();
+            foreach (var student in students)
+            {
+                if (student.Age >= minAge && student.Age <= maxAge)
+                    result.Add(student);
+            }
+            return result;
         }
     }
 
+
     // 成绩管理类
     public class ScoreManager
     {
         // TODO: 定义私有字段存储成绩字典
         // 提示：使用Dictionary<string, List<Score>>存储
-
-
+        Dictionary<string, List<Score>> scores = new Dictionary<string, List<Score>>();
         public void AddScore(string studentId, Score score)
         {
             // TODO: 实现添加成绩的逻辑
             // 1. 参数验证
             // 2. 初始化学生成绩列表（如不存在）
             // 3. 添加成绩
-
+            if (studentId == null || score == null)
+                throw new ArgumentNullException();
+            if (!scores.ContainsKey(studentId))
+                scores[studentId] = new List<Score>();
+            scores[studentId].Add(score);
+
         }
 
         public List<Score> GetStudentScores(string studentId)
         {
             // TODO: 获取指定学生的所有成绩
-
+            if (scores.ContainsKey(studentId))
+                return new List<Score>(scores[studentId]);
+            else
+                return new List<Score>();
         }
 
         public double CalculateAverage(string studentId)
         {
             // TODO: 计算指定学生的平均分
             // 提示：使用foreach循环计算总分，然后除以科目数
-
+            double total = 0;
+            foreach (var score in scores[studentId])
+            {
+                total += score.Points;
+            }
+            if (total==0)
+                return 0;
+            else
+                return total / scores[studentId].Count;
         }
 
         // TODO: 使用模式匹配实现成绩等级转换
         public Grade GetGrade(double score)
         {
-
+            switch (score)
+            {
+                case var s when s >= 90:
+                    return Grade.A;
+                case var s when s >= 80:
+                    return Grade.B;
+                case var s when s >= 70:
+                    return Grade.C;
+                case var s when s >= 60:
+                    return Grade.D;
+                default:
+                    return Grade.F;
+            }
         }
 
         public List<(string StudentId, double Average)> GetTopStudents(int count)
         {
             // TODO: 使用简单循环获取平均分最高的学生
             // 提示：可以先计算所有学生的平均分，然后排序取前count个
-
+            List<(string StudentId, double Average)> result = new List<(string StudentId, double Average)>();
+            foreach (var studentId in scores.Keys)
+            {
+                double average = CalculateAverage(studentId);
+                result.Add((studentId, average));
+            }
+            result.Sort((a, b) => b.Average.CompareTo(a.Average));
+            return result.GetRange(0, count);
         }
 
         public Dictionary<string, List<Score>> GetAllScores()
@@ -177,7 +251,13 @@ public void SaveStudentsToFile(List<Student> students, string filePath)
             try
             {
                 // 在这里实现文件写入逻辑
-
+                using (StreamWriter writer = new StreamWriter(filePath))
+                {
+                    foreach (var student in students)
+                    {
+                        writer.WriteLine($"{student.StudentId},{student.Name},{student.Age}");
+                    }
+                }
             }
             catch (Exception ex)
             {
@@ -194,7 +274,20 @@ public List<Student> LoadStudentsFromFile(string filePath)
             try
             {
                 // 在这里实现文件读取逻辑
-
+                using (StreamReader reader = new StreamReader(filePath))
+                {
+                    string? line;
+                    while ((line = reader.ReadLine()) != null)
+                    {
+                        string[] parts = line.Split(',');
+                        if (parts.Length != 3)
+                            continue;
+                        string studentId = parts[0];
+                        string name = parts[1];
+                        int age = int.Parse(parts[2]);
+                        students.Add(new Student(studentId, name, age));
+                    }
+                }
             }
             catch (Exception ex)
             {
@@ -264,8 +357,8 @@ static void Main(string[] args)
                 Console.WriteLine($"程序执行过程中发生错误: {ex.Message}");
             }
 
-            Console.WriteLine("\n程序执行完毕，按任意键退出...");
-            Console.ReadKey();
+            Console.WriteLine("\n程序执行完毕，按回车键退出...");
+            Console.ReadLine();
         }
     }
 }

Homework/bin/Debug/net9.0/Homework.deps.json

@@ -0,0 +1,23 @@
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v9.0",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v9.0": {
+      "Homework/1.0.0": {
+        "runtime": {
+          "Homework.dll": {}
+        }
+      }
+    }
+  },
+  "libraries": {
+    "Homework/1.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    }
+  }
+}

Homework/bin/Debug/net9.0/Homework.runtimeconfig.json

@@ -0,0 +1,12 @@
+{
+  "runtimeOptions": {
+    "tfm": "net9.0",
+    "framework": {
+      "name": "Microsoft.NETCore.App",
+      "version": "9.0.0"
+    },
+    "configProperties": {
+      "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": false
+    }
+  }
+}

Homework/obj/Debug/net9.0/Homework.AssemblyInfo.cs

@@ -13,7 +13,7 @@
 [assembly: System.Reflection.AssemblyCompanyAttribute("Homework")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+3439ef5fa11ea974a437d4e71f6d7e82763f847e")]
 [assembly: System.Reflection.AssemblyProductAttribute("Homework")]
 [assembly: System.Reflection.AssemblyTitleAttribute("Homework")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]

Homework/obj/Debug/net9.0/Homework.AssemblyInfoInputs.cache

@@ -1 +1 @@
-92fcf719969c7f59361926c468f07a76ab2866f8147167aa553b98c3b9d7ed15
+3e80dbcd1ff00cdcba3863df6d82f161321270261e04e5ccbff3d91e740385e0

Homework/obj/Debug/net9.0/Homework.GeneratedMSBuildEditorConfig.editorconfig

@@ -8,7 +8,7 @@ build_property.PlatformNeutralAssembly =
 build_property.EnforceExtendedAnalyzerRules = 
 build_property._SupportedPlatformList = Linux,macOS,Windows
 build_property.RootNamespace = Homework
-build_property.ProjectDir = C:\Users\ms169\Desktop\Homework\Homework\
+build_property.ProjectDir = E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\
 build_property.EnableComHosting = 
 build_property.EnableGeneratedComInterfaceComImportInterop = 
 build_property.EffectiveAnalysisLevelStyle = 9.0

Homework/obj/Debug/net9.0/Homework.csproj.CoreCompileInputs.cache

@@ -0,0 +1 @@
+1fd125f1881af0b1d5af23aa715b47d86fb58cf91fb04cb99d729a36a293b95c

Homework/obj/Debug/net9.0/Homework.csproj.FileListAbsolute.txt

@@ -0,0 +1,15 @@
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\bin\Debug\net9.0\Homework.exe
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\bin\Debug\net9.0\Homework.deps.json
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\bin\Debug\net9.0\Homework.runtimeconfig.json
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\bin\Debug\net9.0\Homework.dll
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\bin\Debug\net9.0\Homework.pdb
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.GeneratedMSBuildEditorConfig.editorconfig
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.AssemblyInfoInputs.cache
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.AssemblyInfo.cs
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.csproj.CoreCompileInputs.cache
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.sourcelink.json
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.dll
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\refint\Homework.dll
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.pdb
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\Homework.genruntimeconfig.cache
+E:\summerproject\hw\finished\3\CSharpHomework2025\Homework\obj\Debug\net9.0\ref\Homework.dll

Homework/obj/Debug/net9.0/Homework.genruntimeconfig.cache

@@ -0,0 +1 @@
+69d5b00e3f24486c4f950fabda5f365c9078cd42ae4e6d3db90f28389da708f0

Homework/obj/Debug/net9.0/Homework.sourcelink.json

@@ -0,0 +1 @@
+{"documents":{"E:\\summerproject\\hw\\finished\\3\\CSharpHomework2025\\*":"https://raw.githubusercontent.com/RhNO3-lx/CSharpHomework2025/3439ef5fa11ea974a437d4e71f6d7e82763f847e/*"}}