Managed C++/CLI

#include "stdafx.h"
#include <cliext/vector>
#include <cliext/utility>
#include <cliext/algorithm>

using namespace System;

int main(array<System::String ^> ^args)
{
	using namespace cliext;

	vector<pair<System::String^, System::String^>> attributes;

	attributes.push_back(make_pair(gcnew String("Background"),	gcnew String("Red")));
	attributes.push_back(make_pair(gcnew String("Visibility"),	gcnew String("Collapsed")));
	attributes.push_back(make_pair(gcnew String("Happy"),		gcnew String("True")));

	for_each(attributes.begin(), attributes.end(), [](pair<System::String^, System::String^> p){
		Console::WriteLine(p.first + " = " + p.second );
	});

    return 0;
}

// Since the functionm is intended to be used by multiple file,
// it should be declared inside an header file.
void UnmanagedFunction();

#include "unmanaged.h"

void UnmanagedFunction()
{
   // Do something
}

#include "unmanaged.h"
void CallingFunction()
{
  // The following function will be defined since it is declared 
  // inside unmanaged.h which is include by this file.
  // By the way, if the function was inside a different namespace, 
  // you will have to qualify the call or explicitly uses that 
  // namespace (not much different that regular C++)
  UnmanagedFunction();
}