.

BalkenDiagramm/BalkenDiagramm.cs

+namespace Uebung;
+
+class BalkenDiagramm
+{
+    // Zeichnet ein BalkenDiagramm mit den Werten des Feldes f
+    static void ZeichneBalkenDiagramm(int[] feld)
+    {
+        for (int i = 0; i < feld.Length; i++)
+        {
+            Console.Write("{0,2} ", feld[i]);
+            for (int j = 0; j < feld[i]; j++)
+                Console.Write('\u2584'); // Zeichen "Halbblock unten"
+            Console.WriteLine();
+        }
+    }
+
+    static void Main(string[] args)
+    {
+        Console.OutputEncoding = System.Text.Encoding.UTF8;
+
+        int[] f = { 10, 20, 15, 18, 2, 6 };
+
+        ZeichneBalkenDiagramm(f);
+
+        Console.WriteLine("\n\n\n");
+    }
+}

BalkenDiagramm/BalkenDiagramm.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

FeldUebung/FeldUebung.cs

+namespace Uebung;
+
+class Program
+{
+    // Ausgabe Feld f
+    static void Ausgabe(int[] f)
+    {
+        Console.Write("f = [");
+        for (int i = 0; i < f.Length; i++)
+            Console.Write((i != 0 ? ", " : "") + f[i]); // Trick für das Komma erspart ein "if"
+        Console.WriteLine("]\n");
+    }
+
+    // Statistik, berechnet summe, durchschnitt, min, max
+    static void FeldStatistik(int[] f, out int summe, out double durchschnitt, out int min, out int max)
+    {
+        summe = 0;
+        min = f[0];
+        max = f[0];
+
+        for (int i = 0; i < f.Length; i++)
+        {
+            summe += f[i];
+            if (f[i] < min)
+                min = f[i];
+            if (f[i] > max)
+                max = f[i];
+        }
+
+        // Type-Cast zur Vermeidung von Integer-Division
+        durchschnitt = (double)summe / f.Length;
+    }
+
+    static void Main()
+    {
+        int[] f = { 5, 8, 6, 4, 3, 5, 9, 2, 6, 9 };
+
+        Ausgabe(f);
+
+        FeldStatistik(f, out int summe, out double durchschnitt, out int min, out int max);
+        Console.WriteLine("Summe: " + summe);
+        Console.WriteLine("Durchschnitt: " + durchschnitt);
+        Console.WriteLine("Maximum: " + max);
+        Console.WriteLine("Minimum: " + min);
+
+        // Zahl einlesen
+        Console.Write("Zahl eingeben: ");
+        int zahl = Convert.ToInt32(Console.ReadLine());
+
+        Console.Write("Größer sind: ");
+
+        for (int i = 0; i < f.Length; i++)
+        {
+            if (f[i] > zahl)
+                Console.Write(f[i] + " ");
+        }
+        Console.WriteLine("\n");
+
+        // C#-Standard-Funktionalität mit Linq
+        Console.WriteLine($"Summe durch Linq: {f.Sum()}");
+        Console.WriteLine();
+        Console.WriteLine("Maximum durch Linq: " + f.Max());
+        Console.WriteLine("Minimum durch Linq: " + f.Min());
+    }
+}

FeldUebung/FeldUebung.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

QuersummeRekursiv/QuersummeRekursiv.cs

+namespace Uebung;
+
+class Program
+{
+    // Zum Vergleich nochmal iterativ
+    static int QuerSumme(int zahl)
+    {
+        int q = 0;
+
+        while (zahl > 0)
+        {
+            q += zahl % 10;
+            zahl /= 10;
+        }
+
+        return q;
+    }
+
+    // Jetzt rekursiv. Elegant, oder?
+    static int QuerSummeRek(int zahl)
+    {
+        if (zahl < 10)
+            return zahl;
+        else
+            return zahl % 10 + QuerSummeRek(zahl / 10);
+    }
+
+    static void Main(string[] args)
+    {
+        Console.Write("Zahl eingeben: ");
+        int zahl = Convert.ToInt32(Console.ReadLine());
+
+        Console.WriteLine($"QuerSumme({zahl}) = {QuerSumme(zahl)}");
+        Console.WriteLine($"QuerSummeRek({zahl}) = {QuerSummeRek(zahl)}");
+    }
+}

QuersummeRekursiv/QuersummeRekursiv.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Reverse/Reverse.cs

+namespace Uebung;
+
+class Program
+{
+    // Dreht den Feld-Inhalt um
+    static void Reverse(int[] a)
+    {
+        for (int i = 0; i < a.Length / 2; i++)
+        {
+            int temp = a[i];
+            a[i] = a[a.Length - 1 - i]; // oder a[^(1+i)]
+            a[a.Length - 1 - i] = temp;
+        }
+    }
+
+    static void Main()
+    {
+        int[] f = { 6, 7, 4, 3, 2, 5, 9 };
+
+        Reverse(f);
+
+        // jetzt sollte f = { 9, 5, 2, 3, 4, 7, 6 } sein
+        for (int i = 0; i < f.Length; i++)
+            Console.Write(f[i] + " ");
+        Console.WriteLine();
+
+        // Original-Reihenfolge mit Standard-Funktion wieder herstellen
+        Array.Reverse(f);
+        for (int i = 0; i < f.Length; i++)
+            Console.Write(f[i] + " ");
+        Console.WriteLine();
+    }
+}
\ No newline at end of file

Reverse/Reverse.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

SelectionSort/SelectionSort.cs

+namespace Uebung;
+
+class Program
+{
+    // Selection Sort
+    static void Sort(int[] f)
+    {
+        for (int i = 0; i < f.Length; i++)
+        {
+            // Suche Index der nächstkleinsten Zahl
+            int minIdx = i;
+            for (int j = i + 1; j < f.Length; j++)
+            {
+                if (f[j] < f[minIdx])
+                    minIdx = j;
+            }
+
+            // tausche Feldwert mit nächstkleinster Zahl
+            int tmp = f[i];
+            f[i] = f[minIdx];
+            f[minIdx] = tmp;
+        }
+    }
+
+    // Hauptprogramm
+    static void Main()
+    {
+        int[] a = { 5, 8, 3, 2, 9, 8 };
+
+        Sort(a);
+
+        for (int i = 0; i < a.Length; i++)
+            Console.Write(a[i] + " ");
+        Console.WriteLine();
+    }
+}

SelectionSort/SelectionSort.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Uebung07.sln

+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34616.47
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FeldUebung", "FeldUebung\FeldUebung.csproj", "{859CF903-14E3-479E-844D-E9EBBFADCA71}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Reverse", "Reverse\Reverse.csproj", "{E122E1CB-44BC-4E4B-AA9E-1DC9CAD50E9F}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BalkenDiagramm", "BalkenDiagramm\BalkenDiagramm.csproj", "{BC9C48C1-69EA-43D9-BAB0-C528DDC06484}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SelectionSort", "SelectionSort\SelectionSort.csproj", "{0A0E6444-24E7-4AB1-84F8-F8D539009DE1}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "QuersummeRekursiv", "QuersummeRekursiv\QuersummeRekursiv.csproj", "{70BC7F95-242F-4839-8D1D-7BE15FC787D5}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
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+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
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+		{E122E1CB-44BC-4E4B-AA9E-1DC9CAD50E9F}.Debug|Any CPU.Build.0 = Debug|Any CPU
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+		{E122E1CB-44BC-4E4B-AA9E-1DC9CAD50E9F}.Release|Any CPU.Build.0 = Release|Any CPU
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+		{BC9C48C1-69EA-43D9-BAB0-C528DDC06484}.Debug|Any CPU.Build.0 = Debug|Any CPU
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+		{BC9C48C1-69EA-43D9-BAB0-C528DDC06484}.Release|Any CPU.Build.0 = Release|Any CPU
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+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {234FECDE-169F-4E44-B22F-4EA84C8F2E7D}
+	EndGlobalSection
+EndGlobal