diff --git a/homework2/.kdev4/homework2.kdev4 b/homework2/.kdev4/homework2.kdev4
new file mode 100644
index 0000000..cc1a104
--- /dev/null
+++ b/homework2/.kdev4/homework2.kdev4
@@ -0,0 +1,15 @@
+[CMake]
+Build Directory Count=1
+Current Build Directory Index=0
+ProjectRootRelative=./
+
+[CMake][CMake Build Directory 0]
+Build Directory Path=file:///home/sajjad/Desktop/temp/SP4E_HW1/homework2/build
+Build Type=Debug
+CMake Binary=file:///usr/bin/cmake
+Environment Profile=
+Extra Arguments=
+Install Directory=
+
+[Project]
+VersionControlSupport=kdevgit
diff --git a/homework2/homework2.kdev4 b/homework2/homework2.kdev4
new file mode 100644
index 0000000..aba3115
--- /dev/null
+++ b/homework2/homework2.kdev4
@@ -0,0 +1,3 @@
+[Project]
+Manager=KDevCMakeManager
+Name=homework2
diff --git a/homework2/src/main.cc b/homework2/src/main.cc
index e2db29a..8611c22 100644
--- a/homework2/src/main.cc
+++ b/homework2/src/main.cc
@@ -1,65 +1,66 @@
 //main
 
 #include "ComputeArithmetic.hh"
 #include "ComputePi.hh"
 #include "print_series.h"
 #include "write_series.h"
 #include <iostream>
 #include <sstream>
+#include <stdlib.h>
 
 using namespace std;
 
 int main(int argc, char ** argv){
 
     //command line arguments: Type of series and N of terms.
 
     stringstream sstr;
     for (int i = 1 ; i < argc ; ++i){
         sstr << argv[i] << " ";
     }
 
     string which_series;
     string which_dumper;
     int frequency;
     int maxiter;
     sstr >> which_series;
     sstr >> which_dumper;
     sstr >> frequency;
     sstr >> maxiter;
 
     Series * my_series = NULL;
     DumperSeries * my_dumper = NULL;
 
     if (which_series == "pi")
         my_series = new ComputePi();
     else if (which_series == "arithmetic")
         my_series = new ComputeArithmetic();
     else {
         cout<<"insert one of the two available options:"
               "\n\t arithmetic (to compute arithmetic series)"
               "\n\t pi (to compute Pi series)"<<endl;
         return EXIT_FAILURE;
     }
 
     if (which_dumper == "print")
         my_dumper = new PrintSeries(*my_series, frequency, maxiter);
     else if (which_dumper == "write")
         my_dumper = new WriteSeries(*my_series, frequency, maxiter);
     else {
         cout<<"insert one of the two available options:"
               "\n\t print (to print on screen)"
               "\n\t write (to write in file)"<<endl;
         return EXIT_FAILURE;
     }
 
     my_dumper->dump();
 
 
     //double tmpi = my_series->compute(N);
 
     //cout<<"Result for the "<<which_series<<" series with "<<N<<" terms is "<< tmp<<endl;
 
     delete my_series;
     delete my_dumper;
     return 0;
 }
diff --git a/homework2/src/write_series.cc b/homework2/src/write_series.cc
index 3cd7734..79c3fb4 100644
--- a/homework2/src/write_series.cc
+++ b/homework2/src/write_series.cc
@@ -1,41 +1,41 @@
 #include "write_series.h"
 #include <fstream>
   
 WriteSeries::WriteSeries(Series & series, int frequency, int maxiter):
   DumperSeries(series){
   this->frequency = frequency;
   this->maxiter = maxiter;
 }
 
 void WriteSeries::dump(){
   std::string separator = " ";
   std::string file_name = "data" + setSeparator(separator);
-  std::ofstream file(file_name);
+  std::ofstream file(file_name.c_str());
   file<<"#i"<<separator<<"value"<<separator<<"convergence_percent"<<std::endl;
   for(int i=frequency; i<maxiter; i += frequency){
     double value = series.compute(frequency);
     file<<i<<separator<<value;
     double analytic_value = 3;//series.getAnalyticPrediction();
     if(analytic_value != analytic_value){
       file<<std::endl;
     }else{
       double convergence = (value/analytic_value) * 100.0;  //percent
       file<<separator<<convergence<<std::endl;
     }
   }
   file.close();
 }
 
 std::string WriteSeries::setSeparator(std::string separator){
   std::string file_extention;
   if(separator == ","){
     file_extention = ".csv";
   }else if(separator == " " || separator == "\t"){
     file_extention = ".txt";
   }else if(separator == "|"){
     file_extention = ".psv";
   }else{
     std::cerr<<"Not known file separator !!!";
   }
   return file_extention;
 }