When I mut write <iostream.h> and when I must write <iostream>

[Mouhannad]

I want know when I mut write <iostream.h> and when I must write <iostream> and what's the difference please

[CManowar]

you must write only <iostream>..... <iostream> is the correct name of the header file

[Mouhannad]

thanks and can you answer me on this question ?? please :
What the target from writing : ( using namespace std; ) and I want to know a link for the books who are talk about the graphical designing in c++ I mean the forms and the controls because I don't love console projects

[CManowar]

you don't need to write the "std::" to all the standard types (like cout, cin, endl)

eg.

without "using namespace std;"

#include <iostream>

int main() {
   std::cout << "Hello World!" << std::endl;
   return 0;
}

with the "using namespace std;"

#include <iostream>
using namespace std;

int main() {
   cout << "Hello World!" << endl;
   return 0;
}

Advice: dont use "using namespace std;"

[gunsnet]

If u put <iostream.h> you w0nt be needed the std: ... Ex. Putting c0ut using iostream
std::cout<<"hello world";
In iostream.h
cout<<"hello world"; getz?

[Dufresne]

Advice: dont use "using namespace std;"

Why ?

[Mouhannad]

I want to know links for the books who are talk about the graphical designing in c++ I mean the forms and the controls because I don't love console projects please

[CManowar]

Why ?

In time the namespace std will be useless since he may use other namespaces, using <the namespace>::<the element from that namespace> its a good thing

[Mouhannad]

I want to know links for the books who are talk about the graphical designing in c++ I mean the forms and the controls because I don't love console projects please

[Disch]

look up wxWidgets

http://www.wxwidgets.org

They have online tutorials, the API is pretty well documented, there's a forum for help, and there are even books for sale.

Some would say that jumping into GUI programming without first having a firm understanding of C++ basics is a recipe for disaster. I think that's hogwash, though... I didn't have any trouble using MFC when I first started.

[wmheric]

See what's in iostream.h

#include <iostream>
// ...
using std::cout;
using std::cin;
using std::cerr;
using std::clog;
// ... 

But you just pollute the global namespace with more stuff...

My point is: take the time and energy to spell things out unless you have really good excuses

[Bazzy]

If you use only the standard library there's nothing wrong in using namespace std;,
If you are using multiple libraries but you have to use a symbol really often, using a_namespace::symbol; is better than typing a_namespace::symbol every time

[helios]

I will take this moment to state my absolute hatred for using.