Question

I’m trying to write a function that writes information to a stream. I need to be able to pass it either a stringstream or an ostream. I tried declaring the function with F(std::ios* out), but then later when I use the << operator to write to it, I get this error: error: no match for operator<<. How should I be declaring the function?

Answer 1

I think you are looking for c++ references

void F(std::ostream& out)
{
}

would do the trick; Note that this will assume char streams, otherwise:

template <typename Char/*=char*/, typename Traits/*=std::char_traits<CharT> */>
    void F(std::basic_ostream<Char, Traits>& os)
{
}