> I'am a beginner to deal.II. I want to play with the codes in Eclipse.
> But there are some problems.As the following picture showes:
>
> <
https://lh3.googleusercontent.com/-Ta72BJpdCYA/Uhir4v0EMTI/AAAAAAAAAAM/4y4esB37N6w/s1600/%E6%8D%95%E8%8E%B7.PNG>
>
> But if I complie and run the programm in the command line with cmake,
> there is no error and I can get the correct result.
> Why?
>
You need to provide some additional information. How did you create that
project in Eclipse? Did you create new C++ project or import that
created by cmake? Second option should work better - just create
standard MakeFile project using cmake, and import it to Eclipse.
I think, errors suggest that you did not select all the required
libraries for linking.
Best,
Krzysztof Bzowski