redirection temporaire entree standard

#include <iostream>
#include <fstream>
#include <sstream>

void write(std::ostream& out, const std::string& msg)
{
  out << msg << std::endl;
}

int main()
{
  // Sur la sortie standard
  write(std::cout, "Kikoo in cout");

  // Sur la sortie d'erreur
  write(std::cerr, "Kikoo in cerr");

  // Dans un buffer de chaine de caractere
  std::ostringstream ss;
  write(ss, "Kikoo in string stream");
  std::cout << ss.str() << std::endl;

  // Dans un fichier
  std::ofstream file("toto.txt");
  write(file, "Kikoo in file");

  return 0;
}

private:
  void write(std::ostream& out, const std::string& msg) const;
public:
  void writeFile(const std::string& filename, const std::string& msg) const
  {
     std::ofstream file(filename); // std::ios::append pour ne pas ecraser, cf la doc d'ofstream
     write(file, msg);
     file.close();
  }
  void writeOutput(const std::string& msg) const
  {
     write(std::cout, msg);
  }
  void writError(const std::string& msg) const
  {
     write(std::cerr, msg);
  }