Does iostream includes functions of cstdio?

Question

I use Dev C++ 5.11. TDM-GCC 4.8.1

And this code runs well.

#include
using namespace std;

int main()
{
printf(\"%d\\n\", 42);
cout &l         


        

Answer 1

The list of header files included in a system/standard header file is library implementation dependent (that is usually associated with the compiler you're using), and (as far as I remember) the C++ standard does not prohibit one header file from automatically including another one

In your case <iostream> is probably also #including <stdio.h> (or <cstdio>).

Relying on a header file being included in another is non portable to different standard libraries, compilers and platforms, so it's better to make sure that you explicitly #include everything you need.