Question

How to templatize iostream and fstream objects? This way (see the code, please) is not correct… Thanks for your help.

template <typename O>
void test(O &o)
{
    o << std::showpoint << std::fixed << std::right;
    o << "test";
}

int main(int argc, _TCHAR* argv[])
{
  std::iostream out1;  //Write into console
  std::ofstream out2 ("file.txt");  //Write into file
   ....

  test(out1);
  test (out2);

  return 0;
}

Answer 1

Your template function works perfectly for me, although your main function had some serious errors in it. After fixing your errors, this program works for me:

#include <iostream>
#include <fstream>


template <typename O>
void test(O &o)
{
    o << std::showpoint << std::fixed << std::right;
    o << "test";
}

int main(int argc, char* argv[])
{
  // std::iostream out1;  //Write into console
  std::ofstream out2 ("file.txt");  //Write into file
//   ....

  test(std::cout);
  test (out2);

  return 0;
}

I’m not sure why you want a template function, though. Regular polymorphism makes much more sense for this particular case.