Basic string help -- Did I step into the Twilight Zone?

[Xpnctoc]

Please help. I haven't programmed unmanaged C++ in 10 years. I'm trying to re-educate myself but I don't seem to be having a lot of luck. I swear I just stepped into the twilight zone. This code:

#include <string>
#include "stdafx.h"
int _tmain(int argc, _TCHAR* argv[])
{
std::string s = " ";
printf(s);

return 0;
}

...fails to compile with 2 errors: C2039 "string is not a member of std" and C2065 "'s' undeclared identifier". So then I tried a "using namespace" declaration like this:

#include <string>
#include "stdafx.h"
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
string s = " ";
printf(s);

return 0;
}

...and I still get the C2065, though the C2039 is gone. I also tried other ideas, like changing to . Nothing is working. What am I doing wrong??? I am using VS2010 on a Win7 (64bit) machine. Thanks for your help.

[jk chan]

you cannot do printf( s) , instead you can do like printf( s.c_str() ) or cout << s ( make sure that yo include iostream ).

If u can Dream... U can do it

[Stephen Hewitt]

The precompiled header (stdafx.h) should always be the first header included. Also dump the printf. Try code like this:

#include "stdafx.h" // Precompiled header should always be first.
#include <iostream> // We'll use cout instead of printf.
#include <string>
 
int _tmain(int argc, _TCHAR* argv[])
{
    using namespace std;
    string s = "Hello, world!";
    cout << s << endl;
 
    return 0;
}

Steve

[Xpnctoc]

Re-ordering the #includes did the trick. I had read about the use of printf/cout but I hadn't gotten to that point since I couldn't even get my variable declaration to compile. Thanks for the pointers.