Syntax Highlighting

Setup

Package

\usepackage{listings}

Definition

\lstdefinestyle{CUSTOM_STYLE_NAME}{
    language=c++ % could be any language
    numbers=left,
    tabsize=4,
    keywordstyle=\color{COLOR},
    commentstyle=\color{COLOR},
    basicstyle=\ttfamily\color{COLOR},
    stringstyle=\color{COLOR},
    backgroundcolor=\color{COLOR},
    showstringspaces=false
}

Usage

\begin{lstlisting}[style=CUSTOM_NAME_DEFINED_IN_DEFINITION]
    #include <iostream>
    int main () {
        std::cout << "Hello World!" << std::endl;
        return 0;
    }
\end{lstlisting}