LaTeX 列表包：常量/类/变量的不同样式

\documentclass{article}
\usepackage{listings}
\usepackage{color}

\definecolor{keywordcolor}{rgb}{0.2,0.2,1}
\definecolor{commentcolor}{rgb}{0.1,0.5,0.1}
\definecolor{stringcolor}{rgb}{0.7,0.1,0.1}

\lstset{
  language=C++,
  basicstyle=\small\ttfamily,
  keywordstyle=\color{keywordcolor},
  commentstyle=\color{commentcolor},
  stringstyle=\color{stringcolor},
  showstringspaces=false,
  breaklines=true,
  frame=single
}

\begin{document}
\begin{lstlisting}
#include<iostream>

class MyClass {
public:
  int myConstant = 42;
  void myFunction(int myVariable) {
    std::cout << "Hello, World!"<< std::endl;
  }
};
\end{lstlisting}
\end{document}