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Aug 17th, 2008

Can't use Strings :'(

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Hi everyone, I'm new and hope someone can help with my problem. First of all English is not my first languaje so I hope you all can be a little patient with my writing

Here's the thing. I'm new to C++, and I'm using Borland 3.1 (this is the teacher's choice so I prefer to work with this compiler, because I will have to use it for the tests), and I simply haven't been able to work with Strings. I have tried these 3 "includes" (I don't really know how they are called

),

#include <string> The compiler gives me an error when I use this one
#include <string.h> No problem when compiling
#include <CString> No problem when compiling

But when I put

string q; or
CString q;

The compiler gives me this 2 errors:

"Undefined symbol 'string' (or 'CString' depending of which one I'm using)" and
"Statement misssing ;"

Any idea?

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Risame

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Aug 17th, 2008

Re: Can't use Strings :'(

Try using the fully qualified name to make sure you've made the namespace visible for the <string> header:

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std::string q;

Radical Edward

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Aug 17th, 2008

Re: Can't use Strings :'(

what compiler and os are you using? Are you trying to compile a C file with *.c extension?

The only CString class I know of is in Microsoft's MFC library.

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Aug 17th, 2008

Re: Can't use Strings :'(

Sorry I didn't put the code between the [code] [/code'] thing, I am really in a hurry with this thing and didn't pay attention. I tried to fix my last post but couldn't find an "edit" button

I tried what you said, and It gives me this error: "Typer qualifier 'std' must be a struct or class name"

I don't know if this error is related with the fact that I am not using the line

C++ Syntax (Toggle Plain Text)

using namespace std;

This is because this instruction gave me this error : "Declaration syntax error" . I read that this line was necessary for the instruction "cout" to work, but I eliminated it, and I can use the "cout" without a problem.

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Aug 17th, 2008

Re: Can't use Strings :'(

Click to Expand / Collapse Quote originally posted by Ancient Dragon ...

what compiler and os are you using? Are you trying to compile a C file with *.c extension?

The only CString class I know of is in Microsoft's MFC library.

I'm using Windows XP and Borland 3.1.

About the other question, the file's name ends in .CPP, is that what you are asking me ?

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Re: Can't use Strings :'(

It looks a lot like you're either using a really old C++ compiler, or you're compiling your code as C instead of C++.

Radical Edward

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Aug 17th, 2008

Re: Can't use Strings :'(

Try this program:

C++ Syntax (Toggle Plain Text)
// HelloWorld.cpp
 
#include <string>
using namespace std;
 
int main ()
{
    cout << "Hello World" << endl;
    return 0;
}
// HelloWorld.cpp

#include <string>
using namespace std;

int main ()
{
    cout << "Hello World" << endl;
    return 0;
}

See if you get any errors. You shouldn't.

VernonDozier

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Aug 17th, 2008

Re: Can't use Strings :'(

Click to Expand / Collapse Quote originally posted by Radical Edward ...

It looks a lot like you're either using a really old C++ compiler, or you're compiling your code as C instead of C++.

If that's the case what can I do ?

To VernonDozier: It gives me an error with this two lines:

C++ Syntax (Toggle Plain Text)
#include <string>
using namespace std;
#include <string>
using namespace std;

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Aug 17th, 2008

Re: Can't use Strings :'(

Click to Expand / Collapse Quote originally posted by Risame ...

If that's the case what can I do ?

To VernonDozier: It gives me an error with this two lines:
C++ Syntax (Toggle Plain Text)
#include <string>
using namespace std;
#include <string> using namespace std;

I know nothing about Borland and how to check what compiler you are using and how to configure it, but there must be a way. If you are accidentally using a C compiler, you'll get those errors. make sure the file extension of your source file is not .c but is rather something like .cpp. There's usually some option where you can figure out what compiler is being used and change it if necessary, but like I said, not knowing Borland, I don't know where that option would be.

I'd ditch the compiler altogether though and ask your professor if he/she is willing to teach the class using something more modern. It's about 15 years old. There are a lot of free modern ones available.

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Aug 17th, 2008

Re: Can't use Strings :'(

Click to Expand / Collapse Quote originally posted by VernonDozier ...

Try this program:
C++ Syntax (Toggle Plain Text)
// HelloWorld.cpp
 
#include <string>
using namespace std;
 
int main ()
{
    cout << "Hello World" << endl;
    return 0;
}
// HelloWorld.cpp #include <string> using namespace std; int main () { cout << "Hello World" << endl; return 0; }
See if you get any errors. You shouldn't.

Heh heh. Simple Hello World program and I screw it up. You have to #include <iostream>. Still you should not have gotten those errors and thus you're likely accidentally compiling in C. Corrected program below:

C++ Syntax (Toggle Plain Text)
// HelloWorld.cpp
 
#include <iostream>
#include <string>
using namespace std;
 
int main ()
{
    cout << "Hello World" << endl;
    return 0;
}
// HelloWorld.cpp

#include <iostream>
#include <string>
using namespace std;

int main ()
{
    cout << "Hello World" << endl;
    return 0;
}

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