private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {
              openFileDialog1->ShowDialog();
             ifstream my_input_file;
             pin_ptr<const wchar_t> wch = PtrToStringChars(openFileDialog1->FileName);
             my_input_file.open(wch,ios::in | ios::binary);

             int i;
             float f;

             my_input_file >>i >> f;

             my_input_file.close();
         }
private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
             saveFileDialog1->ShowDialog();
             ofstream my_output_file;
             pin_ptr<const wchar_t> wch = PtrToStringChars(saveFileDialog1->FileName);
             my_output_file.open(wch,ios::out | ios::binary);

             int i=5;
             float f=7.3;

             my_output_file << f << i;

             my_output_file.close();

         }