Class errors

can someone tell me why VC++ .net won't compile this, but Dev C++ 4 does ?

Code:

---

#include <iostream>

class clearscreen
{
 public:void clear()
{

  using namespace std;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
 cout<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl<<endl;
}

};

---

here is the error from .NET

c:\cpp\Game\RPG Game\Clearscreen.cpp(21): error C2872: 'cout' : ambiguous symbol

it comes up 10 times, for each 'cout'

It compiles fine in VC++6 if I add a main() function. Have you ever considered that all those couts and endls could be replaced by:

Code:

---

for(int i=0; i<100; i++)
{
    cout<<endl;
}

---

It compiles with .Net 2003 (VC 7.1).

But 100 times endl is very ugly (endl == '\n' + flush)

Code:

---

for(int i=0; i<100; i++)
{
    cout<< '\n';
}
cout.flush();

---

I ended up making it a function instead of a class

I don't know why .NET won't compile it though *shrugs*

Yeah, in my function I added the loop instead of all the couts :)
I didnt worry about the number of couts in the class, but seeing as its now a function, i didnt want a heap of useless lines added :p

It works just fine for me in VS .NET 2002.

It sounds like somewhere, through some other #include, that you are ALSO including the deprecated iostreams. For example, I get exactly those errors if I did:

#include <iostream>
#include <iostream.h>

because it doesn't know the difference between std::cout and the global ::cout; both are now in the global namespace.

I'd wager $50 that somewhere, you #include some header that #includes the deprecated iostreams.

Check your output window (not the task window), I bet you ALSO got a warning:

: warning C4995: '_OLD_IOSTREAMS_ARE_DEPRECATED': name was marked as #pragma deprecated

.net enterprise architect compiled it fine

Any compiler, VC .NET included, would compile it fine; he has an error in the #includes that aren't shown. His error is that there are two "cout"s declared globally, and the compiler doesn't (and can't) know which to use.

You should have using namespace std; right after the #include, not in a function.

It's OK to put it in a function; it limits the scope of "using" to just that function (which is often better, especially if you're dragging the entirety of std:: into there).

Cool. I never knew that.