Just add the part with filecontentsfrom my mwe to your older question to the code above:
\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@Book{Goossens,
author = {Goossens, Michel and Mittelbach, Frank and
Samarin, Alexander},
title = {The LaTeX Companion},
edition = {1},
publisher = {Addison-Wesley},
location = {Reading, Mass.},
year = {1994},
}
@Book{adams,
title = {The Restaurant at the End of the Universe},
author = {Douglas Adams},
series = {The Hitchhiker's Guide to the Galaxy},
publisher = {Pan Macmillan},
year = {1980},
}
article{einstein,
author = {Albert Einstein},
title = {{Zur Elektrodynamik bewegter K{\"o}rper}. ({German})
[{On} the electrodynamics of moving bodies]},
journal = {Annalen der Physik},
volume = {322},
number = {10},
pages = {891--921},
year = {1905},
DOI = {http://dx.doi.org/10.1002/andp.19053221004},
}
@misc{mozart:KV183,
author = {Mozart, Wolfgang Amadeus},
title = {Sinfonie g-Moll},
year = {1773},
address = {Salzburg},
note = {New K{\"o}chelverzeichnis Nr. 183, old version Nr. 25;
Erster Satz: Allegro con brio, Zweiter Satz: Andante,
Dritter Satz: Menuetto, Vierter Satz: Allegro},
}
\end{filecontents*}
This creates a file mwe.bib if you use the code inside a file mwe.tex. That's the reason you have line \bibliography{\jobname.bib} in your given code: \jobname changes to mwe and the bib file used is so mwe.bib.
Complete code:
\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@Book{Goossens,
author = {Goossens, Michel and Mittelbach, Frank and
Samarin, Alexander},
title = {The LaTeX Companion},
edition = {1},
publisher = {Addison-Wesley},
location = {Reading, Mass.},
year = {1994},
}
@Book{adams,
title = {The Restaurant at the End of the Universe},
author = {Douglas Adams},
series = {The Hitchhiker's Guide to the Galaxy},
publisher = {Pan Macmillan},
year = {1980},
}
article{einstein,
author = {Albert Einstein},
title = {{Zur Elektrodynamik bewegter K{\"o}rper}. ({German})
[{On} the electrodynamics of moving bodies]},
journal = {Annalen der Physik},
volume = {322},
number = {10},
pages = {891--921},
year = {1905},
DOI = {http://dx.doi.org/10.1002/andp.19053221004},
}
@misc{mozart:KV183,
author = {Mozart, Wolfgang Amadeus},
title = {Sinfonie g-Moll},
year = {1773},
address = {Salzburg},
note = {New K{\"o}chelverzeichnis Nr. 183, old version Nr. 25;
Erster Satz: Allegro con brio, Zweiter Satz: Andante,
Dritter Satz: Menuetto, Vierter Satz: Allegro},
}
\end{filecontents*}
\documentclass{article}
\usepackage[round]{natbib}
\newcommand{\footcite}[1]{\footnote{\cite{#1}}}
\begin{document}
This is text with \cite{Goossens}.
And\footcite{mozart:KV183}.
\bibliographystyle{plainnat}
\bibliography{\jobname} % <===================================
\end{document}
Please see that you have to delete the file extention .bib in the third last line: change \bibliography{\jobname.bib} to \bibliography{\jobname}. Then the code compiles. Do not forget to compile pdflatex, bibtex, pdflatex, pdflatex.
Result is then:
