add Programmyday form github

StudentenDatenbank/Datenbank.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Intrinsics.X86;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StudentenDatenbank
+{
+    internal class Datenbank
+    {
+        private Student[] studenten;
+
+        public Datenbank(int anzahl) 
+        { 
+            studenten = new Student[anzahl];
+        }
+        public bool AddStudent(Student student) 
+        {
+            for (int i = 0; i < studenten.Length; i++)
+            {
+                if (studenten[i] == null)
+                {
+                    studenten[i] = student;
+                    return true;
+                }
+            }
+            return false;
+        }
+        public bool RemoveStudent(Student student) 
+        {
+            for (int i = 0; i < studenten.Length; i++)
+            {
+                if (studenten[i] == student) 
+                {
+                    studenten[i] = null;
+                    return true;
+                }
+            }
+            return false;
+        }
+        public bool RemoveStudent (int martrieklNr)
+        {
+            for (int i = 0; i < studenten.Length; i++)
+            {
+                if (studenten[i] != null)
+                {
+                    if (studenten[i].GetMatrikelNr() == martrieklNr)
+                    {
+                        studenten[i] = null;
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        public int CountStudents()
+        {
+            int cnt = 0;
+            for (int i = 0; i < studenten.Length; i++)
+            {
+                if (studenten[i] != null)
+                {
+                    cnt++;
+                }
+            }
+            return cnt;
+        }
+        public void PrintMe()
+        {
+            for (int i = 0; i < studenten.Length; i++)
+            {
+                if (studenten[i] != null)
+                {
+                    studenten[i].PrintMe();
+                }
+            }
+        }
+    }
+}

StudentenDatenbank/Program.cs

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+namespace StudentenDatenbank
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Student s1 = new Student(1, "Max", "Informatik");
+            Student s2 = new Student(2, "Dörte", "Mathematik");
+            Student s3 = new Student(3, "Udo", "Agrartechnik");
+            Student s4 = new Student(4, "Sibille", "Architecktur");
+
+            Datenbank db = new Datenbank(5);
+            
+            db.AddStudent(s1);
+            db.PrintMe();
+            Console.WriteLine();
+
+            db.AddStudent(s2);
+            db.AddStudent(s3);
+            db.PrintMe();
+            Console.WriteLine();
+
+            db.RemoveStudent(s2);
+            db.PrintMe();
+            Console.WriteLine();
+
+            db.RemoveStudent(1);
+            db.PrintMe();
+        }
+
+    }
+}

StudentenDatenbank/Student.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StudentenDatenbank
+{
+    internal class Student
+    {
+        private int matrikelNr;
+        private string? name;
+        private string? fachrichtung;
+
+        public Student(int  matrikelNr, string? name, string? fachrichtung)
+        {
+            this.matrikelNr = matrikelNr;
+            this.name = name;
+            this.fachrichtung = fachrichtung;
+        }
+        public int GetMatrikelNr() { return this.matrikelNr; }
+        public string? GetName() { return this.name;  }
+        public string? GetFachrichtung() { return this.fachrichtung; }
+
+        public void PrintMe() 
+        {
+            Console.WriteLine($"Matrikel-Nr.: {this.matrikelNr}");
+            Console.WriteLine($"Name: {this.name}");
+            Console.WriteLine($"Fachrichtung: {this.fachrichtung}");
+        }
+    }
+}

StudentenDatenbank/StudentenDatenbank.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>