diff --git a/Prog1_WS2017-18/10CallByReference/10CallByReference.csproj b/Prog1_WS2017-18/10CallByReference/10CallByReference.csproj
new file mode 100644
index 0000000000000000000000000000000000000000..5de77f36f0dca58ae0b1a8cdde293f721a4a13a9
--- /dev/null
+++ b/Prog1_WS2017-18/10CallByReference/10CallByReference.csproj
@@ -0,0 +1,60 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {1A720D7E-A300-4351-9052-B774416A1BE8}
+ Exe
+ Properties
+ _10CallByReference
+ 10CallByReference
+ v4.5.2
+ 512
+ true
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Prog1_WS2017-18/10CallByReference/App.config b/Prog1_WS2017-18/10CallByReference/App.config
new file mode 100644
index 0000000000000000000000000000000000000000..88fa4027bda397de6bf19f0940e5dd6026c877f9
--- /dev/null
+++ b/Prog1_WS2017-18/10CallByReference/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Prog1_WS2017-18/10CallByReference/Program.cs b/Prog1_WS2017-18/10CallByReference/Program.cs
new file mode 100644
index 0000000000000000000000000000000000000000..41d2143c77c9257d50791ad3e9ce81c93357fdd6
--- /dev/null
+++ b/Prog1_WS2017-18/10CallByReference/Program.cs
@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _10CallByReference
+{
+ class Program
+ {
+ static void IncrByValue(int x)
+ { // Call by Value: Wert wird kopiert
+ x = x + 1;
+ Console.WriteLine($"x in Incr {x}");
+ }
+
+ static void IncrByRef(ref int x, out int y)
+ { // Ref: Es ist sichergestellt, dass die Ref-Var. einen initialisierten Wert besitzt
+ // Out: Es ist nicht sichergestellt, dass die out-Var einen init. Wert besitzt
+ // ABER: Es wird in der Funktion sichergestellt, dass der out-Var ein
+ // Wert zugewiesen wird, analog zum return
+ x = x + 1;
+ y = x * 2;
+ Console.WriteLine($"x in Incr-By-Ref {x}, y in Main {y}");
+ }
+
+ //static double Gps2Kart(double Laengengrad, double Breitengrad,
+ // out double x, out double y)
+
+ static void IncrArrayByValue(int[] f)
+ {
+ for (int i = 0; i < f.Length; i++)
+ {
+ f[i]++;
+ }
+ }
+ static void IncrArrayByRef(ref int[] f)
+ {
+ f = new int[] { 100, 200, 300, 400, 500, 600, 700, 800 };
+ }
+ static void Main(string[] args)
+ {
+ int x = 10;
+ int a = 20;
+ int[] feld = { 10, 20, 30, 40 };
+ IncrByValue(x);
+ IncrByValue(x + 1); // Bei der by-value-Übergabe sind auch arithm. Ausdrücke erlaubt
+ IncrByRef(ref x, out a);
+ // IncrByRef(ref x + 1, out a); // Bei der by-ref-Übergabe sind nur Variablen erlaubt
+ // keine Konstanten, keine arithm. Ausdrücke!
+ // Übergabe per ref: Variable muss vorher intialisiert worden sein
+ // Übergabe per out: Variable muss vorher nicht init. werden
+ Console.WriteLine($"x in Main {x}, a in Main {a}");
+ IncrArrayByValue(feld);
+ foreach (int item in feld)
+ {
+ Console.WriteLine(item);
+ }
+ Console.WriteLine("-----------");
+ IncrArrayByRef(ref feld);
+ foreach (int item in feld)
+ {
+ Console.WriteLine(item);
+ }
+
+ }
+ }
+}
diff --git a/Prog1_WS2017-18/10CallByReference/Properties/AssemblyInfo.cs b/Prog1_WS2017-18/10CallByReference/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000000000000000000000000000000000000..0ee245f8e3888c2209afdb60d1678ab1f89a83be
--- /dev/null
+++ b/Prog1_WS2017-18/10CallByReference/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("10CallByReference")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("10CallByReference")]
+[assembly: AssemblyCopyright("Copyright © 2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components. If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("1a720d7e-a300-4351-9052-b774416a1be8")]
+
+// Version information for an assembly consists of the following four values:
+//
+// Major Version
+// Minor Version
+// Build Number
+// Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Prog1_WS2017-18/Prog1_WS2017-18.sln b/Prog1_WS2017-18/Prog1_WS2017-18.sln
index e3888ef56b91d84952162c170d6381b1bb292e1a..a0384b22e31c220a7e5c7732c820cc2365626a9f 100644
--- a/Prog1_WS2017-18/Prog1_WS2017-18.sln
+++ b/Prog1_WS2017-18/Prog1_WS2017-18.sln
@@ -79,6 +79,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "10JaggedArrays", "10JaggedA
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "10WortweiseZerlegung", "10WortweiseZerlegung\10WortweiseZerlegung.csproj", "{375DCCFF-AD56-4BD7-B382-CB3DCBA7B79F}"
EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "10CallByReference", "10CallByReference\10CallByReference.csproj", "{1A720D7E-A300-4351-9052-B774416A1BE8}"
+EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@@ -225,6 +227,10 @@ Global
{375DCCFF-AD56-4BD7-B382-CB3DCBA7B79F}.Debug|Any CPU.Build.0 = Debug|Any CPU
{375DCCFF-AD56-4BD7-B382-CB3DCBA7B79F}.Release|Any CPU.ActiveCfg = Release|Any CPU
{375DCCFF-AD56-4BD7-B382-CB3DCBA7B79F}.Release|Any CPU.Build.0 = Release|Any CPU
+ {1A720D7E-A300-4351-9052-B774416A1BE8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {1A720D7E-A300-4351-9052-B774416A1BE8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {1A720D7E-A300-4351-9052-B774416A1BE8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {1A720D7E-A300-4351-9052-B774416A1BE8}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE