Which C++ version has #include iostream.h already defined? "didn't have to use std::"

Question

When I took my second programing class this was the version. (long time ago) My teacher let me take it home to practice it was on 5-7 disk (3.5 floppy) to install.

I believe it's Turbo C++ Professional 2.0 It had templates, projects options and used the standard mini square blue screen (ide). You didn't have to use any extra includes or statements for input, output.

With time that old PC went, taking the software with it. (yes I do have newer versions like builder 5,6)

If anyone knows the version please let me know Thanks ahead of Time.

Answer 1

Borland C++ 3.1, too. Visual C++ 6.0 and older.

Answer 2

iostream.h is the deprecated version.

use #include < iostream >

Answer 3

Namespaces help avoiding name collisions. The current standard has #include <iostream> substituting the previous #include <iostream.h>. You should get used to the std:: prefix to identify the namespace where the standard libraries live, or you can apply using directives to avoid having to write std:: all around:

#include <iostream>
using namespace std;
int main() {
   cout << "No std:: required here" << endl;
}

The using directive tells the compiler to bring all identifiers from the namespace here, avoiding the need for qualification. Note that in the presence of ambiguities you will still need to fully qualify.

#include <iostream>
int cout;
int main() {
   using namespace std;
   ::cout = 5;
   std::cout << ::cout << endl;
}

Answer 4

iostream.h was a part of the standard library as documented by C++ Annotated Reference Manual (which was a de facto standard document prior to ISO standardization of the language).