C# 培训测验 [已关闭]

C# 培训测验案例代码介绍

csharp
   public class Student
   {
       public int StudentId { get; set; }
       public string Name { get; set; }
       public int Age { get; set; }
       public double Score { get; set; }
   }
   

csharp
   public class StudentManagementSystem
   {
       private List students;
       public StudentManagementSystem()
       {
           students = new List();
       }
       public void AddStudent(Student student)
       {
           students.Add(student);
       }
       public Student GetStudentById(int studentId)
       {
           return students.FirstOrDefault(s => s.StudentId == studentId);
       }
       public void UpdateStudent(Student student)
       {
           var existingStudent = students.FirstOrDefault(s => s.StudentId == student.StudentId);
           if (existingStudent != null)
           {
               existingStudent.Name = student.Name;
               existingStudent.Age = student.Age;
               existingStudent.Score = student.Score;
           }
       }
       public void DeleteStudent(int studentId)
       {
           var student = students.FirstOrDefault(s => s.StudentId == studentId);
           if (student != null)
           {
               students.Remove(student);
           }
       }
   }
   

csharp
class Program
{
    static void Main(string[] args)
    {
        StudentManagementSystem sms = new StudentManagementSystem();
        // 添加学生
        Student student1 = new Student()
        {
            StudentId = 1,
            Name = "张三",
            Age = 18,
            Score = 90.5
        };
        sms.AddStudent(student1);
        // 查询学生
        Student student = sms.GetStudentById(1);
        Console.WriteLine($"学号：{student.StudentId}，姓名：{student.Name}，年龄：{student.Age}，成绩：{student.Score}");
        // 修改学生信息
        student.Name = "李四";
        sms.UpdateStudent(student);
        // 删除学生
        sms.DeleteStudent(1);
        Console.ReadLine();
    }
}