"string" type could not be resolved Eclipse C++

Question

I am trying to do this:

#include <string>

class Medicine{

    string name;


};

but it's not working at all. I tried Right Click on the Project -> Index -> Searched for Unresolved Includes and it says: Unresolved includes in the Project(0 matches). It's not working with std::string either. What should I do?

@David it's not working. – Cucerzan Rares Mar 31 '13 at 23:36 — Cucerzan Rares, Mar 31 '13 at 23:36

Andy Prowl · Answer 1 · 2013-03-31T23:36:23.730

5

You should either fully qualify string with the namespace it belongs to (std):

#include <string>

class Medicine {
    std::string name;
//  ^^^^^
};

Or use a using declaration:

#include <string>

using std::string; // <== This will allow you to use "string" as an
                   //     unqualified name (resolving to "std::string")

class Medicine {
    string name;
//  ^^^^^^
//  No need to fully qualify the name thanks to the using declaration
};

edited Mar 31 '13 at 23:36

answered Mar 31 '13 at 23:30

Andy Prowl

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The std::string name it's not working. Neither is the second one using std::string (eclipse says: syntax error). – Cucerzan Rares Mar 31 '13 at 23:32
@CucerzanRares: It compiles [here](http://liveworkspace.org/code/48Ihhx$223). Please make sure you copy everything exactly. – Andy Prowl Mar 31 '13 at 23:33
2

@CucerzanRares: Could you provide any more info on what is not working? What message are you getting from the compiler? – Andy Prowl Mar 31 '13 at 23:35
4

@CucerzanRares, when you say "it's not working" and don't explain what the problem is, a programmer dies somewhere in the world. Please be careful. – Shoe Mar 31 '13 at 23:36
@Jueecy Or a doctor dies. Or a mechanic. Depends on who you're talking to. – Drew Dormann Mar 31 '13 at 23:37
@Jueecy I already said the error: Type 'std::string' could not be resolved – Cucerzan Rares Mar 31 '13 at 23:38
1

@CucerzanRares: Does your program include only and exactly those 4 lines? – Andy Prowl Mar 31 '13 at 23:39
1

Is this just Eclipse's editor complaining? That is, does your code **compile**? – johnsyweb Mar 31 '13 at 23:40
@AndyProwl the #include is in a medicine.h header file. – Cucerzan Rares Mar 31 '13 at 23:48
@Johnsyweb No, it doesn't compile – Cucerzan Rares Mar 31 '13 at 23:48
2

@CucerzanRares: Please try to compile that simple, 4 line program. With *nothing else inside*. If it doesn't compile, then there's probably something wrong with the project settings or some global Eclipse settings. If the simple minimal 4-line program compiles, then it means the problem is with additional stuff you have – Andy Prowl Mar 31 '13 at 23:51
@AndyProwl If i am in a .cpp file it recognises the string name but if I am in a header file i receive the error. :( I just don't get why it's working in .cpp and it doesn't in .h... – Cucerzan Rares Mar 31 '13 at 23:55
@CucerzanRares You seem to be dealing with a different problem than the one in your posted question then. – Drew Dormann Apr 01 '13 at 00:00
@DrewDormann All I know is that this eclipse is weird. – Cucerzan Rares Apr 01 '13 at 00:02
@cucerzan-rares How are you compiling a header file‽ – johnsyweb Apr 01 '13 at 06:14

score 1 · Answer 2 · edited May 23 '17 at 12:21

1

The string class (of the header) is defined inside the std namespace. You are missing using std::string; or std:: before string in the object declaration.

If you still can't fix it then take a look at this answer.

edited May 23 '17 at 12:21

Community

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1

answered Mar 31 '13 at 23:31

Shoe

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none of those it's working – Cucerzan Rares Mar 31 '13 at 23:34
3

@CucerzanRares They do. You are missing something. – Mar 31 '13 at 23:35
@H2CO3 No, it's not working for me. I am working in Eclipse for C++ – Cucerzan Rares Mar 31 '13 at 23:38
@CucerzanRares, watch edit. – Shoe Mar 31 '13 at 23:41

score 0 · Answer 3 · answered Mar 31 '13 at 23:48

0

try creating a new console project and keeping it to this simple code below. If this doesn't work then possibly you're eclipse isn't setup for c++ correctly. The default download for an eclipse c++ environment is here http://www.eclipse.org/cdt/

#include "stdafx.h"//optional depending if you have precompiled headers in VC++ project
#include <string>

using std::string;

class Medicine
{
    string name;        
};

// or use this alternative main if one below doesn't work
//int main(int argc, _TCHAR* argv[])
int _tmain(int argc, _TCHAR* argv[])
{
    Medicine test;

    return 0;
}

answered Mar 31 '13 at 23:48

Rich

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it's working. But when I am in a header file it doesn't recognise the string. – Cucerzan Rares Mar 31 '13 at 23:53
I don't see why this shouldn't work if you've #included and used "using std::string;" in the header. I think you need to post more code so we can see more of what you're doing. Specifically post the code from the header file that eclipse is complaining about, exactly as it appears in your project. – Rich Apr 01 '13 at 00:01

"string" type could not be resolved Eclipse C++

3 Answers3