diff --git a/assignments/04/04_1.cpp b/assignments/04/04_1.cpp
new file mode 100644
index 0000000..197959e
--- /dev/null
+++ b/assignments/04/04_1.cpp
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <vector>
+#include "ExtendedVector.hpp"
+
+using namespace std;
+
+const vector<double> vec1 = {1, 2, 3, 4, 5};
+const vector<double> vec2 = {5, 4, 3, 2, 1};
+
+// pretty vector printing
+ostream& operator<<(ostream& os,
+                    const vector<double>& v) {
+    os << "< ";
+    for (auto it = v.begin(); it != v.end()-1; ++it) {
+        os << *it << ", ";
+    }
+    os << *v.end() << " > ";
+    return os;
+}
+
+int main() {
+    cout << "Max vec1: " << ExtendedVector::max(vec1) << endl;
+    cout << "Max vec2: " << ExtendedVector::max(vec2) << endl;
+    
+    cout << "Beide Vektoren sind jeweils ausschließlich positiven Werten gefüllt: " << (ExtendedVector::allPositive(vec1) && ExtendedVector::allPositive(vec2)) << endl;
+    
+    cout << "Skalarprodukt vec1 x vec2: " << ExtendedVector::product(vec1, vec2) << endl;
+    cout << "vec1 * 5: " << ExtendedVector::product(vec1, 5) << endl;
+    cout << "Norm von vec1: " << ExtendedVector::norm(vec1) << endl;
+    
+    vector<double> vec_copy;
+    copy(vec1.begin(), vec1.end(), back_inserter(vec_copy));
+    ExtendedVector::normalise(vec_copy);
+    
+    cout << "Normalisierung von vec1: " << vec_copy << endl;
+    return 0;
+}