I'm trying to use NetBeans 6.8 on an AIX OS for C++ development.
I continue getting an error message for:
using namespace std;
even after adding the includes for the STL via
options -- c/c++ -- code assistance
The error says: "Unable to resolve identifier std"
Is this a bug in the Netbeans 6.8 AIX version? Or am I missing something?
Thanks for any help!
You can easily enough test if there is no std namespace getting included before your using directive by adding in
namespace std
{
}
just before it. If the compiler is now happy then there was no std namespace stuff actually included.
Related
I have been using OpenCV 3.0 that are combined with the extra modules using CMake 3.5. I am using Visual Studio 2012 32bit as my IDE.
However, i cannot seem to use both KeyLine and also BinaryDescriptor. They give me error which is "identifier KeyLine is undefined". I have set the Paths and also library setting.
#include <opencv2/opencv.hpp>
#include <opencv2/line_descriptor.hpp>
#include <iostream>
using namespace std;
using namespace cv;
int main( void ) {
Ptr<BinaryDescriptor> bd = BinaryDescriptor::createBinaryDescriptor();// this line gives error
vector<KeyLine> lines; // same as this
}
I have tried the other header, for instance the tracking.hpp. I am able to define:
Ptr<Tracker> tkr;
Without having the Tracker giving me error.
Anyone know if the error is caused during CMake process or i miss out something?
I just had the same problem, and stumbled upon your question.
The answer I just found out is you have to add,
using namespace line_descriptor;
at the top along with cv namespace.Got this hint from line_descriptor.hpp source code.
I'm running on a CentOS 6.5 x64 OS and have used yum to install armadillo. I'm developing in Eclipse CDT
I've included the armadillo header in the project properties >> C/C++ Build >> Settings >> GCC C++ Compiler >> Includes >> Include files. The entry is: "/usr/include/armadillo"
The header file I am working on recognizes armadillo and the include statement isn't flagged for any errors or warnings.
Below is the code:
#include <armadillo>
using namespace std;
using namespace arma; // arma is not recognized as a symbol
const double DEGREES_PER_RADIAN = 180.0 / datum::pi; // datum is not recognized
I've checked the file /usr/include/armadillo and it does include the namespace arma section.
//! \namespace arma namespace for Armadillo classes and functions
namespace arma
{
// preliminaries
...
I've also checked the permissions and the /usr/include/armadillo file is readable to all users.
The problem is when I add the "using namespace arma", CDT marks it as an error and says that "Symbol 'arma' could not be resolved".
At this point, I don't have any other ideas to figure out why the namespace isn't recognized. Any insights or pointers to figure this out would be much appreciated.
This question's answer provided the answer to my issue:
Clean Eclipse Index, it is out of sync with code
Josh Kelley's answer from the linked issue:
Right-click on your project, go under the Index submenu, and choose either "Rebuild," "Update with modified files," or "Freshen all files."
I don't know the difference between those three options, but one of "Update with modified files" or "Freshen all files" usually fixes it for me.
Also, I'm sure you've already done this, but make sure that you're running the latest version of the Eclipse CDT. Current versions seem to have much more reliable indexing than previous versions.
After running Index >> Rebuild and Index >> Freshen All Files, the errors were gone.
I'm trying to compile CppUTest as a library on IAR Workbench v6.3.3 for the AVR UC3C0512C on Windows 7 x64 but when I compile it, it says that the std namespace is not defined.
Here is the snippet of code where I get the first error, the file is SimpleString.h:
#if CPPUTEST_USE_STD_CPP_LIB
#include <string>
#include <stdint.h>
SimpleString StringFrom(const std::string& other);
The last line contains the std::string and this brings me 190 errors all related to this. The message is:
Error[Pe276]: name followed by "::" must be a class or namespace name
C:\COM\SRC\cpputest35\include\CppUTest\SimpleString.h 143
I have tried using the line below but it does not help:
using namespace std;
Under Library Configuration I select Normal DLIB, I also tried with Full DLIB but IAR can't see the std library
Any ideas please?
According to the IAR manuals
The std namespace is not used in either standard EC++ or in Extended EC++. If you
have code that refers to symbols in the std namespace, simply define std as nothing;
for example:
#define std // Nothing here
I am building a Makefile project in Eclipse Juno, and I have it set up so it compiles and debugs (it's using CMake, so I'm not using the internal tools). However, Eclipse obviously hasn't been informed of the right headers, as in the following code:
#include <iostream>
using namespace std;
int main ()
{
cout << "Hello world << endl;
return 0;
}
the include "iostream" and symbols "std", "cout" and "endl" are all unresolved.
How should I make Eclipse aware of these so it will stop underlining everything in red and spamming with errors?
This can be resolved by specifying the following environmental variables in Project->Properties->C++ Build->Environment.
LANG=en_US
LC_ALL=en_US
Apparently they are needed for the auto-discovery tools to work out where the includes live.
Answer gleaned from this Eclipse forum thread.
I want to use Directory.GetFiles to read files from a folder. From msdn website i found:
For c, i have include:
using System;
using System.IO;
For C++, i have include:
#using <mscorlib.dll>
using namespace System;
using namespace System::IO;
as header.
For the C++, after the line #using is added, the "fatal error C1190: managed targeted code requires a '/clr' option" appears. So i tried by adding /clr in the visual studio Properties\Linker\Command Line as i found it in other website, but i fail too.
I did it wrongly. So, How to handle error of "fatal error C1190: managed targeted code requires a '/clr' option"? How to "compile with the /clr flag"?
Because i am writing for OpenCv, i have include the following additional dependencies in order to use c and c++:
cv210d.lib
cxcore210d.lib
highgui210d.lib
cvaux210d.lib
Cannot work. What other requirements in order to use Directory.GetFiles?
I also cannot use foreach even i #include .
Is there something similar to use foreach and Directory.GetFiles which is necessary to be included in a project?
I am using Visual Studio 2008
Please help me. Tq
You need to create managed c++ CLI, this should include all the flags for you.
To set /clr from visual studio, go to porject properities->configurations properities->general set common language runtime support to /clr