Programming

#include<iostream>
       #include<fstream>
       #include<string>

       using namespace std;

       class diff {
               private:
               ifstream infile1,infile2;
              fstream samedata;
          public:
          diff (char *,char *,char *);
          void write_file ();

      };

      diff::diff (char * file1, char * file2, char *samefile) {
          infile1.open(file1,ios::binary);
          infile2.open(file2,ios::binary);
          samedata.open(samefile,ios::in | ios::out | ios::trunc);

          /*if (infile1.is_open() || infile2.is_open() || samedata.is_open())
          {
          cout << "File Opened Succesfully !!!" <<endl;
          }*/

          /*infile1.close();
          infile2.close();
          samedata.close();*/
      }


      void diff::write_file () {
          string line1,line2;

          if (infile1.is_open() && infile2.is_open())
          {
              while (!infile1.eof())
              {
              getline (infile1,line1);
              if (line1.empty())
              break;
      while (!infile2.eof())
      {
              getline (infile2,line2);
              if (line2.empty())
              break;
      if (line1.compare(line2) == 0)
       {
              samedata << line1 << "\n";
      }
      }
      infile2.clear();
      infile2.seekg(0,ios::beg);
              }
        }
        }

      int main (int argc,char *argv[])
      {
          char *samedatafile="samedata.txt";
          string line1;
          diff diffobj(argv[0],argv[1],samedatafile);
          diffobj.write_file();
          return 0;
      }

// diff diffobj(argv[0],argv[1],samedatafile);
diff diffobj(argv[1],argv[2],samedatafile);