diff --git a/SCE/SCE/2d.cpp b/SCE/SCE/2d.cpp
index 3712970..3d8027b 100644
--- a/SCE/SCE/2d.cpp
+++ b/SCE/SCE/2d.cpp
@@ -1 +1,6 @@
-#include "2d.h"
\ No newline at end of file
+#include "2d.h"
+
+long double Circle::compute_area(long double d) 
+{
+	return (d / 2)*(d / 2) * 3.14159265359;
+}
\ No newline at end of file
diff --git a/SCE/SCE/3d.cpp b/SCE/SCE/3d.cpp
index 783b49e..14b49fe 100644
--- a/SCE/SCE/3d.cpp
+++ b/SCE/SCE/3d.cpp
@@ -23,7 +23,7 @@ void Cylinder::data_entry()
 		cout << "Definieren Sie die Teilabschnitte des Zylinders" << endl;
 		cout << "	Laenge in mm: "; cin >> teil_lange; heights.push_back(teil_lange);
 		cout << "	Durchmesser in mm: "; cin >> teil_durchmesser; radii.push_back(teil_durchmesser);
-		cout << "	Dichte in g/mm^3: "; cin >> teil_dichte; densities.push_back(teil_dichte);
+		cout << "	Dichte in g/cm^3: "; cin >> teil_dichte; densities.push_back(teil_dichte);
 		cout << "	Spezifischer Widerstand in ohm * (mm^2) / m: "; cin >> teil_widerstand; resistances.push_back(teil_widerstand);
 		cout << "	Gibt es weitere Teilbereiche? j/n "; cin >> auswahl;
 	}
diff --git a/SCE/SCE/SCE.cpp b/SCE/SCE/SCE.cpp
index 1ef7e10..4e90a61 100644
--- a/SCE/SCE/SCE.cpp
+++ b/SCE/SCE/SCE.cpp
@@ -1,8 +1,10 @@
 #include "3d.h"
 #include <iostream>
+#include "lgs.h"
 using namespace std;
 
 void cylinder();
+void lgs();
 
 int main()
 {
@@ -11,6 +13,7 @@ int main()
 	{
 		cout << "Was wollen Sie tun ?" << endl;
 		cout << "1 Berechungen an einem Zylinder" << endl;
+		cout << "2 LGS lösen" << endl;
 
 		cout << "e Beenden" << endl;
 		
@@ -18,6 +21,7 @@ int main()
 		switch(auswahl)
 		{
 			case '1': cylinder(); break;
+			case '2': lgs(); break;
 			
 			default: cout << "Okay, bye" << endl; break;
 		}
@@ -32,3 +36,8 @@ void cylinder()
 	cylinder.compute_options();
 
 }
+void lgs()
+{
+	LGS lgs;
+	lgs.data_entry();
+}
diff --git a/SCE/SCE/lgs.cpp b/SCE/SCE/lgs.cpp
new file mode 100644
index 0000000..57c8cd3
--- /dev/null
+++ b/SCE/SCE/lgs.cpp
@@ -0,0 +1,89 @@
+#include "lgs.h"
+#include "time.h"
+#include <iostream>
+using namespace std;
+
+void LGS::data_entry()
+{
+	char auswahl = 'n';
+	//Data entry
+	while (auswahl == 'n')
+	{
+		cout << "Anzahl der Unbekannten: "; cin >> variables;
+		creat_array();
+		cout << "Geben Sie die Gleichungen nach folgendem Schema an:" << endl;
+		cout << "[A1 *x][B1 *y][C1 *z]=[D1]" << endl;
+		cout << "[A2 *x][B2 *y][C2 *z]=[D2]" << endl;
+		cout << "[A3 *x][B3 *y][C3 *z]=[D3]" << endl;
+		
+		for (int i = 0; i < variables; ++i)
+		{
+			for (int n = 0; n < variables+1; ++n)
+			{
+				cout << " "; 
+				int var = n + 65;
+				cout << (char)var << i + 1 << ": ";
+				cin >> GA[i][n];
+				
+			}
+			print_ln(i);
+			cout << endl;
+		}
+		print();
+		cout << "Sind die angaben Korrekt? j/n"; cin >> auswahl;
+		
+	}
+	cout << endl;	
+	
+}
+
+void LGS::creat_array()
+{
+	GA = new long double*[variables];
+	for (int i = 0; i < variables; ++i)
+		GA[i] = new long double[variables+1];
+}
+
+void LGS::print()
+{
+	for (int i = 0; i < variables; ++i)
+	{
+		for (int n = 0; n < variables + 1; ++n)
+		{
+			cout << GA[i][n] << " ";
+			if (n == variables-1)
+				cout << "= ";
+		}
+		cout << endl;
+	}
+}
+
+void LGS::print_ln(int ln)
+{
+	for (int n = 0; n < variables + 1; ++n)
+	{
+		int var = 123 - variables + n;
+		cout << " +" << GA[ln][n] << (var!=123  ? (char)var : ' ');
+		if (n == variables - 1)
+			cout << "= ";
+	}
+	cout << endl;
+}
+
+float LGS::cramer()
+{
+	double t1 = clock();
+
+	return (float)((clock() - t1) / CLOCKS_PER_SEC);
+}
+
+float LGS::gauss()
+{
+	double t1 = clock();
+
+	return (float)((clock() - t1) / CLOCKS_PER_SEC);
+}
+
+
+
+
diff --git a/SCE/SCE/lgs.h b/SCE/SCE/lgs.h
new file mode 100644
index 0000000..e165b96
--- /dev/null
+++ b/SCE/SCE/lgs.h
@@ -0,0 +1,22 @@
+#pragma once
+class LGS{
+public:
+	long double** GA;
+	int variables = 0;
+
+
+	LGS(){};
+	~LGS()
+	{
+		for (int i = 0; i < variables; ++i)
+			delete[] GA[i];
+		delete[] GA;
+	};
+
+	float gauss();
+	float cramer();
+	void data_entry();
+	void creat_array();
+	void print();
+	void print_ln(int);
+};
\ No newline at end of file