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Hi
I am a beginner and currently I am working on a program.
I have a main class called 'FenPrincipale' of daughter classes 'FenCene' and 'FenCenep'.
I am a beginner and currently I am working on a program.
I have a main class called 'FenPrincipale' of daughter classes 'FenCene' and 'FenCenep'.
My IDE sends me the following error at fencen.h and fencenep.h
'nullptr was not declared in the scope'
'identify 'nullptr' is a keyword in C ++ [-wc ++ 0x-compat]
'identify 'nullptr' is a keyword in C ++ [-wc ++ 0x-compat]
The notification is the same in the headers of the two classes.
Here is the code of fencene.h
Here is the code of fencenep.h
Here is the code of fenprincipale.h
What can I do to fix the problem?
Thank you in advance....
I am running Eclipse Helios and I have g++-4.6 installed. Hope I am not wrong that g++4.6 implements C++ 11 features. I have created a C++ project which uses the nullptr and auto keywords. The build gives the following errors:-
Actually it was building fine until yesterday. I am getting these from nowhere today. Please help me solve this problem.
Answers:
According to the GCC page for C++11:
To enable C++0x support, add the command-line parameter -std=c++0x to your g++ command line. Or, to enable GNU extensions in addition to C++0x extensions, add -std=gnu++0x to your g++ command line. GCC 4.7 and later support -std=c++11 and -std=gnu++11 as well.
Did you compile with
-std=gnu++0x
?Answers:
Finally found out what to do. Added the -std=c++0x compiler argument under Project Properties -> C/C++ Build -> Settings -> GCC C++ Compiler -> Miscellaneous. It works now!
But how to add this flag by default for all C++ projects? Anybody?
Answers:
Is that an actual compiler error or a Code Analysis error? Some times the code analysis can be a bit sketchy and report non-valid errors.
Nullptr Was Not Declared In This Scope C Dev-c Review
To turn off code analysis for the project, right click on your project in the Project Explorer, click on Properties, then go to the C/C++ General tab, then Code Analysis. Then click on “Use Project Settings” and disable the ones that you do not wish for.
Also, are you sure you are compiling with the C++11 compiler?
Answers:
Go to Settings -> Compiler…
And add flag to “Have g++ follow the coming C++0x ISO C++ language standard [std=c++0x]
And add flag to “Have g++ follow the coming C++0x ISO C++ language standard [std=c++0x]
Nullptr Was Not Declared In This Scope C Dev-c 2017
Answers:
You are using g++ 4.6 version you must invoke the flag -std=c++0x to compile
g++ -std=c++0x *.cpp -o output
Nullptr Was Not Declared In This Scope C Dev-c 2
Answers:
I add the “,-std=c++0x” after “-c -fmessage-length=0″,under Project Properties -> C/C++ Build -> Settings -> GCC C++ Compiler -> Miscellaneous. Dont’t forget to add the comma “,” as the seperator.
Tags: c++, eclipse