need a good explanation

[Anarki]

what are the differences between

1) #include <iostream.h>

2) #include <iostream>
using namespace std;

[Martin York]

Re: need a good explanation

On Jun 25, 10:11 pm, Anarki <Deepchan...@gm ail.comwrote:

what are the differences between
>
1)  #include <iostream.h>

This was valid before the STL became standard.
After standardization it is no longer valid. Some compilers support it
but only for backwards computability, as a result any code using this
is not very portable.

>
2) #include <iostream>
    using namespace std;

This is part of the STL.
All items in the STL are in the std namespace.

[Mike Wahler]

Re: need a good explanation


"Anarki" <Deepchand.P@gm ail.comwrote in message
news:5dca8d5a-810f-4c52-9356-7bfedaf8ab60@w4 g2000prd.google groups.com...

what are the differences between
>
1) #include <iostream.h>
>
2) #include <iostream>
using namespace std;

The second is standard C++, the first is not.
None of the C++ standard headers contain ".h"
in their names.

-Mike

[Juha Nieminen]

Re: need a good explanation

Anarki wrote:

what are the differences between
>
1) #include <iostream.h>
>
2) #include <iostream>
using namespace std;

Both are equally bad ways of saying:

#include <iostream>

[kamit]

Re: need a good explanation

As others have mentioned use #include <iostreamand NOT #include
<iostream.h>.

Case 1: #include <iostream>
Here everything is wrapped under the namespace std;


Case 2: #include <iostream.h>
Here everything is under global namespace.

HTH.

On Jun 26, 6:18 am, Juha Nieminen <nos...@thanks. invalidwrote:

Anarki wrote:

what are the differences between

>

1)  #include <iostream.h>

>

2) #include <iostream>
    using namespace std;

>
  Both are equally bad ways of saying:
>
#include <iostream>