C++ Question on String (Resolved)

But how come i cannot declare String??
There's an error: Undeclared identifier "string"

i have already included string.h

#include <iostream>
#include <fstream.h>
#include <stdlib.h>
#include <STRING>

int main () {

String A;
return 0;
}

This is a C# forum, not a C++ one.

But it probably has something to do with the case.

Try

string instead of String

it doesnt solve the problem
Thanks

Quote:

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Originally posted by Shaman
i have already included string.h

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No you haven't. including <string> does NOT guarentee that string.h is included. #include <string>, however, is the correct way.

Quote:

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Originally posted by Shaman

Code:

---

#include <iostream>
#include <fstream.h>
#include <stdlib.h>
#include <STRING>

int main () {

String A;
return 0;
}

---

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Are you coming from VB? DO NOT USE CAPITALS!!!, C++ is case sensative in everything. An INT is not the same as an int.

To include and use a string:

Code:

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#include <iostream>
#include <string>

int main () {
string A;
}

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Also, why do you have these in your code?:

Code:

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#include <fstream.h>
#include <stdlib.h>

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You declare the first header (iostream) correctly, these 2 deprecately and the last 1 incorrectly (capitals).

If you want fstream and stdlib, do this:

Code:

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#include <fstream>
#include <cstdlib>

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Also, there is a C++ forum here, post C++ questions there. C# is an entirely different language with similar syntax in certain elements.

i have found the solution

declaration is :

#include <string.h>
using namespace std;

Its a stupid MS bug!
Thanks

Its not a bug. My guess is you are using Managed C++, so you have to use the managed extensions.

Quote:

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Originally posted by Shaman
i have found the solution

declaration is :

#include <string.h>
using namespace std;

Its a stupid MS bug!
Thanks

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No, that is a bad solution because that is a deprecate header file. Include <string> not <string.h>.

Because the header is deprecate, it doesn't even use the namespace std, so why did you even declare it?

That isn't an MS bug, I'd suggest a nice C++ book that is caught up with the standard. www.nuwen.net click on C++, go to the bottom and check out the book recommendations. They are all great.

Quote:

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Originally posted by DevGrp
Its not a bug. My guess is you are using Managed C++, so you have to use the managed extensions.

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Managed extensions don't mean you use string.h instead of string. string.h is deprecate, he should be using <string>.

Quote:

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Originally posted by kasracer
No, that is a bad solution because that is a deprecate header file. Include <string> not <string.h>.

Because the header is deprecate, it doesn't even use the namespace std, so why did you even declare it?

That isn't an MS bug, I'd suggest a nice C++ book that is caught up with the standard. www.nuwen.net click on C++, go to the bottom and check out the book recommendations. They are all great.

Managed extensions don't mean you use string.h instead of string. string.h is deprecate, he should be using <string>.

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I was'nt refering to the <string> or <string.h>. I was refering to the using namespace std which is used when writing managed C++.

Quote:

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Originally posted by DevGrp
I was'nt refering to the <string> or <string.h>. I was refering to the using namespace std which is used when writing managed C++.

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Uh, no. Managed C++ uses Microsoft's Propritary .NET framework.

The using namespace directive just states that he will be using the namespace std, which is part of the standard C++ libraries.

std has NOTHING to do with managed C++.