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std: a namespace with this name does not exist

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Join Date: Mar 2007

Posts: 154

Reputation: mrjoli021 is an unknown quantity at this point

Solved Threads: 0

mrjoli021

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Junior Poster

std: a namespace with this name does not exist

Jan 7th, 2008

I am having some isues adding std as a namespace. I am using vs2008. don't know if that has something to do with it.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#pragma once
 
//using namespace System;
using namespace std;
 
namespace Email {
 
	public ref class Class1
	{
 
	private:
		void telnet ()
		{
			system("dir");
		}
 
	};
}
#pragma once

//using namespace System;
using namespace std;

namespace Email {

	public ref class Class1
	{
		
	private:
		void telnet ()
		{
			system("dir");
		}

	};
}

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include "stdafx.h"
#include "Email.h"
#include <iostream>
#include <fstream>
#include <String>
//#include <cstdio>
//#include <stdlib.h>
 
 
using namespace Email;
//using namespace System;
//using namespace std;
 
void main()
{
}
#include "stdafx.h"
#include "Email.h"
#include <iostream>
#include <fstream>
#include <String>
//#include <cstdio>
//#include <stdlib.h>


using namespace Email;
//using namespace System;
//using namespace std;

void main()
{
}

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Join Date: Mar 2007

Posts: 154

Reputation: mrjoli021 is an unknown quantity at this point

Solved Threads: 0

mrjoli021

Offline

Junior Poster

Re: std: a namespace with this name does not exist

Jan 7th, 2008

I figured it out. when you do a class library std is replaced by system.

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Join Date: Oct 2007

Posts: 1,953

Reputation: Duoas has much to be proud of

Solved Threads: 214

Duoas

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Posting Virtuoso

Re: std: a namespace with this name does not exist

Jan 7th, 2008

It most certainly does exist, and vs2008 is pretty darn standards-compliant.

Be careful about your capitalization. Also, you must include one of the STL headers to see it.

Try:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
using namespace std;
 
int main() {
  cout << "Hello world!" << endl;
  return EXIT_SUCCESS;
  }
#include <iostream>
using namespace std;

int main() {
  cout << "Hello world!" << endl;
  return EXIT_SUCCESS;
  }

However, you have changed the current scope by saying
using namespace Email;
You might want to try referring to it absolutely (not relatively):
using namespace ::std;

Hope this helps.