int main()
{
  ofstream fout("output.txt");
  //processing.
 //output to file
 //using fout
 //no console output
 
 //showFile(output.txt);
 return 0;
}

#include <fstream>
#include <string>
 
// Open a file and display it
void showFile ( const char *filename )
{
  std::ifstream in ( filename );
  std::string line;
 
  while ( std::getline ( in, line ) )
    std::cout<< line <<'\n';
}

#include <cstdlib>
#include <string>
 
// Open a file and display it in the specified program
void showFile ( const std::string& program, const std::string& filename )
{
  std::system ( ( program + " " + filename ).c_str() );
}

showFile ( "notepad.exe", "C:\\narue_is_kewl.txt" );