diff --git a/exercice_2/src/CMakeLists.txt b/exercice_2/src/CMakeLists.txt
index 5a8844a..681fd68 100644
--- a/exercice_2/src/CMakeLists.txt
+++ b/exercice_2/src/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 2.8)
 project(exercice_2)
 
-add_executable(main main.cc series.hh series.cc compute_arithmetic.hh compute_arithmetic.cc compute_pi.hh compute_pi.cc)
+add_executable(main main.cc series.hh series.cc compute_arithmetic.hh compute_arithmetic.cc compute_pi.hh compute_pi.cc dumper_series.hh dumper_series.cc print_series.hh print_series.cc)
 
 
diff --git a/exercice_2/src/dumper_series.cc b/exercice_2/src/dumper_series.cc
index 4a118ee..f3c6e88 100644
--- a/exercice_2/src/dumper_series.cc
+++ b/exercice_2/src/dumper_series.cc
@@ -1,3 +1,5 @@
 #include "dumper_series.hh"
 
 DumperSeries::DumperSeries(Series &series) : series(series) {}
+
+DumperSeries::~DumperSeries() = default;
diff --git a/exercice_2/src/dumper_series.hh b/exercice_2/src/dumper_series.hh
index 1181f69..f7f8203 100644
--- a/exercice_2/src/dumper_series.hh
+++ b/exercice_2/src/dumper_series.hh
@@ -1,17 +1,18 @@
 #ifndef DUMPER_SERIES_HH
 #define DUMPER_SERIES_HH
 
 #include "series.hh"
 
 class DumperSeries {
 public:
   DumperSeries(Series &series);
+  virtual ~DumperSeries();
 
 public:
   virtual void dump() = 0;
 
 protected:
   Series &series;
 };
 
 #endif
diff --git a/exercice_2/src/main.cc b/exercice_2/src/main.cc
index 27572f4..36f2b3b 100644
--- a/exercice_2/src/main.cc
+++ b/exercice_2/src/main.cc
@@ -1,45 +1,49 @@
 /* created by Marti Bosch and Marc Schwaerzel*/
 /* -------------------------------------------------------------------------- */
 #include <cstdlib>
 #include <iostream>
 #include <sstream>
 
 #include "compute_arithmetic.hh"
 #include "compute_pi.hh"
 #include "print_series.hh"
 #include "series.hh"
 /* -------------------------------------------------------------------------- */
 
 int main(int argc, char **argv) {
   std::cout << "exercice 2" << std::endl;
 
   std::cout << "please enter the following arguments: frequence, maxiter, "
                "serie_type= #"
             << std::endl;
   const char *series_type;
   int maxiter;
   int ferquency;
 
   if (argc != 3) {
 
     std::cout << "retry with arg: frequence, maxiter, serie_type=pi/arithmetic"
               << std::endl;
 
     return EXIT_FAILURE;
   }
 
   Series *input_series_type;
 
   /* if (series_type == "arithmetic"){
 
     input_series_type = new ComputeArithmetic();
 
   }
   else if (series_type == "pi"){
 
     input_series_type = new ComputePi();
 
   }
   else{std::cout << "input error"<< std::endl;
   }*/
+
+  ComputeArithmetic comparith;
+
+  PrintSeries printseries(comparith, 100, 10);
 }
diff --git a/exercice_2/src/print_series.cc b/exercice_2/src/print_series.cc
index 7f9bd94..78488c3 100644
--- a/exercice_2/src/print_series.cc
+++ b/exercice_2/src/print_series.cc
@@ -1,11 +1,13 @@
 #include "print_series.hh"
 #include <iostream>
 
 PrintSeries::PrintSeries(Series &series, unsigned int maxiter,
                          unsigned int frequency)
     : DumperSeries(series), maxiter(maxiter), frequency(frequency) {}
 
 void PrintSeries::dump() {
   for (int i = 1; i <= this->maxiter; i += this->frequency)
     std::cout << this->series.compute(i) << std::endl;
 }
+
+PrintSeries::~PrintSeries() = default;