working on #3

src/Motorradvermietung.cpp

@@ -3,6 +3,7 @@
 #include <list>
 #include <vector>
 #include <fstream>
+#include <ctime>
 
 using namespace std;
 
@@ -477,18 +478,44 @@ void rent_a_motorcycle()
     system("pause");
 }
 
+auto int_to_string(const int value, const unsigned int numbers = 0) -> string
+{
+    auto str = to_string(value);
+    const auto len = numbers - str.length();
+    for (unsigned int i = 0; i < len; ++i)
+    {
+        str.insert(0, "0");
+    }
+    return str;
+}
+
+string current_date_time()
+{
+    auto t = time(nullptr);
+    struct tm buf{};
+    localtime_s(&buf, &t);
+    const auto time = int_to_string(buf.tm_hour, 2)
+        + ":" + int_to_string(buf.tm_min, 2)
+        + ":" + int_to_string(buf.tm_sec, 2);
+    const auto date = int_to_string(buf.tm_mday, 2)
+        + "." + int_to_string(1 + buf.tm_mon, 2)
+        + "." + int_to_string(1900 + buf.tm_year, 4);
+
+    return date + " " + time;
+}
+
 void export_reservations()
 {
     ofstream f;
     f.open("reservierungen.txt", ios::app);
-    f << "Export" << endl;
+    f << "Export (" << current_date_time() << ")" << endl;
     for (auto reservation : reservations)
     {
-        f << reservation->get_id()<< ". ";
+        f << reservation->get_id() << ". ";
-        f << motorcycles[reservation->get_motorcycle()]<< " ";
+        f << motorcycles[reservation->get_motorcycle()] << " ";
-        f << reservation->get_start_date()<< " - "<< reservation->get_end_date()<< " ";
+        f << reservation->get_start_date() << " - " << reservation->get_end_date() << " ";
         f << reservation->get_customer()->get_first_name() << " " << reservation->get_customer()->get_name();
-        f <<endl;
+        f << endl;
     }
     f << "------------" << endl;
     f.close();