code
I am writing a long report, and I need to include some code I wrote.
I would like my code to appear colorized, as can be seen in some text editors, but not by using the verbatim package.
I need to colorize two distinct languages:
Thank you in advance for your help.
I don't know how to use catchfilebetweentags. I would write a script to extract each code section into its own file, then use the mcode package to include the file in the doc.
You might find mcode useful anyway, since it does the matlab syntax highlighting for you.
\lstinputlisting{/SOME/PATH/FILENAME.M}
\lstinputlisting[firstline=6, lastline=15]{/SOME/PATH/FILENAME.M}
In this solution I use the facilities of fancyvrb to write the C++ source code to a file called hello.cpp. Then I proceed to compile the written file and execute the programme. Finally I include the output generated by the programme.
You need --shell-escape for the example to work.
\documentclass{article}
\usepackage{fancyvrb}
\begin{document}
\begin{VerbatimOut}{hello.cpp}
#include <fstream>
int main() {
std::ofstream out;
out.open("cpp-out.txt");
out << "Hello World!" << std::endl;
out.close();
return 0;
}
\end{VerbatimOut}
\immediate\write18{g++ -o hello hello.cpp}
\immediate\write18{./hello}
\input{cpp-out.txt}
\end{document}
We can use this technique to include C code in a similar way (of course we need to use another compiler). In this example I exploit this to rapidly calculate factorials:
\documentclass{article}
\usepackage{fancyvrb}
\begin{document}
\begin{VerbatimOut}{fac.c}
#include <stdio.h>
long long factorial(int n) {
if (n <= 1) return 1;
return n*factorial(n-1);
}
int main(int argc, char* argv[]) {
int n = atoi(argv[1]);
printf("%lld\n", factorial(n));
return 0;
}
\end{VerbatimOut}
\immediate\write18{gcc -o fac fac.c}
\newcommand\factorial[1]{%
\immediate\write18{./fac #1 > /tmp/result.tex}%
\input{/tmp/result.tex}%
}
\factorial{5}
\factorial{20}
\end{document}
Now the same code with lualatex, which will yield the same output:
\documentclass{article}
\usepackage{luacode}
\begin{luacode*}
function factorial(n)
if (n <= 1) then
return 1
end
return n*factorial(n-1)
end
\end{luacode*}
\begin{document}
\newcommand\factorial[1]{%
\luaexec{tex.sprint(string.format("\%d", factorial(#1)))}%
}
\factorial{5}
\factorial{20}
\end{document}
Best Answer
Not contradicting anything in JoG's answer: