From C++ std:
\begin{cppcode}
void pop();
\end{cppcode}
\slidep
From the C FLINT library:
\begin{ccode}
void fmpz_mod_poly_add(
    fmpz_mod_poly_t res,
    const fmpz_mod_poly_t poly1,
    const fmpz_mod_poly_t poly2);
\end{ccode}
\vspace{\baselineskip}
\slidep
Regular C functions in real-world (omitting examples on purpose):
\begin{itemizep}
\item 100+ LOC
\item at least 7 ifs, 4 whiles, 12 variables, 1 goto
\item accesses both static and global variables
\item indenting level of 5 or more
\item a lot of memory management and custom-made error handling
\item references everywhere!
\end{itemizep}