Can I include both C and C++ header file in a same program. Does this program works?

Question

#include <stdio.h>
#include <iostream.h>
using namespace std;

int main(){
printf(" Hello\n");
cout<<" World"<<endl;
}

Answer 1

C headers are compatible in C++, so yes. You can also find the counterparts of C headers in C++, e.g. <stdio.h> is <cstdio> in C++, but the former can also be used.

Answer 2

If you are using a c++ compiler yes. All features of c are included in c++.

Answer 3

MANY programs do this so yes