Created the solution_2.cpp

units/2023_11_15/solution_2.cpp

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+#include <iostream>
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/classification.hpp>
+
+using namespace std;
+
+int main() {
+    string input;
+    int summe1, summe2, gesamt;
+
+    getline(cin, input);
+
+    vector<string> parts;
+    boost::split(parts, input, boost::is_any_of(" "));
+
+    cout << parts[0] << " - Länderkennziffer (40 = Deutschland)" << endl;
+    cout << parts[1] << " - Kennzeichen des Herstellers" << endl;
+    cout << parts[2] << "- Produktkennziffer" << endl;
+    cout << parts[3] << " - Prüfziffer" << endl;
+
+    input.erase(std::remove_if(input.begin(), input.end(), ::isspace), input.end());
+
+    for (int i = 0; i < 12; i += 2) {
+        summe1 += (input[i] - '0');
+        summe2 += (input[i + 1] - '0');
+    }
+
+    gesamt = summe1 + summe2 * 3;
+
+    cout << "Summe1: " << summe1 << endl;
+    cout << "Summe2: " << summe2 << endl;
+    cout << "Gesamtsumme: " << gesamt << endl;
+    cout << "Differenz zu 70 = " << (70 - gesamt);
+}