Just do 'using namespace dealii' in main(). #14523
Merged
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As pointed out to me in an email by Andrew Tadashi Salmon. The issue here is that when we run our tutorial programs through filters and then doxygen, the
dealii::
part is stripped out. As a consequence, while the code is correct, if you copy-paste what you see on the website into your own program, it won't compile. Fix this by just doingusing namespace dealii;
in the code and using the unqualified name./rebuild