Namespace dllimport error

[theranga]

I've got 2 functions in a namespace, like so:

// util.h
#include <string>
using namespace std;

#ifdef UTILDLL
#define UTILPART __declspec(dllexport)
#else
#define UTILPART __declspec(dllimport)
#endif

namespace funcs
{
    string UTILPART func1 (int);
    int UTILPART func2 (string);
}

The DLL which contains these functions looks like this:

// util.cpp

#define UTILDLL
#include "util.h"

// define the functions here 

The executable which uses these functions looks like this:

// exec.cpp
#include "util.h"

// Do stuff involving those functions 

When I compile this in VS 2010, I don't get any errors for the DLL, but the executable gives me:

util.h(13): error C2146: syntax error : missing ';' before identifier 'string'
util.h(13): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
util.h(14): error C2144: syntax error : 'int' should be preceded by ';'
util.h(14): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
util.h(14): error C2086: 'int utilityFunctions::UTILPART' : redefinition
          util.h(13) : see declaration of 'utilityFunctions::UTILPART'
util.h(14): error C2086: 'string funcs::UTILPART' : redefinition
          util.h(13) : see declaration of 'funcs::UTILPART'

Does anyone know why it says this?

[kbw]

Don't put using namespace ... in a header file, it has global impact, and won't behave as you think.

There's more to this than you're showing. Where did the name utilityFunctions come from?

[theranga]

There's more to this than you're showing

it's a big file which is otherwise working properly, so i cut everything but the important bits (ie this namespace) and made it more readable. utilityFunctions is the implementation name for funcs

[kbw]

Have you removed using namespace std from your header file(s)?

If you really want to see what's going on, make the preprecessor write its output to a file and look at the file. Visual Studio will generate a .i file for preprocessor output.