Thread: use <fstream> and ostream overloading together

Hy all,

I create a small project that dealls with some student data structure. Now I want this program to read the data from a file and write it to another.
I think that using <fstream> library is the most easy way. But I also have in my program the ostream operator overloaded and I don't really succeeded to make them work togheter.

This is what I tried:

Code:

#include <iostream.h>
#include <fstream>
#include <string>

using std::ifstream;
using std::string;
using std::getline;

Is silly but I'm in a hurry. This does not work because the "cout" is not overloaded to write a string line ...
Any ideea will be greatly apreciated.
Thank you!

I don't understand your question.
but using

Code:

#include <iostream>

might help
Kurt

Originally Posted by ZuK

I don't understand your question.
but using

Code:

#include <iostream>

might help
Kurt

well, I solved the problem ...
I was mixing <iostream> with <iostream.h>.

But I have now a curiosity:
Why I can't write:
friend ostream& operator <<(ostream& os, student& st);
and use it without having to use the "std" namespce ?
If I only include <iostream> it gives me a lot of errors including: "missing ';' before '&' " ...
If I also put "using namspace std" everything is ok.
Any ideea ?
Thank you!

Because ostream is in the std namespace. It worked with <iostream.h> because that is an old, non-standard header that didn't use namespaces. When you switch to the standard header <iostream>, you have to specify the std namespace just like with <fstream> and <string>.