%!TEX program = xelatex
\documentclass{article}
\usepackage[UTF8,scheme=plain]{ctex}
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\usepackage{amsmath,amsthm,amsfonts,amssymb}
\usepackage{graphicx}
\usepackage{float}
\usepackage{subcaption}
\usepackage{booktabs,multirow,multicol}
\usepackage{indentfirst}
\usepackage{hyperref}
\usepackage{setspace}
\usepackage{listings}
\usepackage[ruled,noline]{algorithm2e}
\usepackage{bm}
\usepackage{xcolor}

\graphicspath{
    {./figure/}{./figures/}{./image/}{./images/}{./graphic/}{./graphics/}{./picture/}{./pictures/}
}

\lstdefinestyle{simpleStyle}{
    basicstyle=\ttfamily\small,
    breaklines=true,
    keywordstyle=\color{blue},
    identifierstyle=\color{black},
    stringstyle=\color{violet},
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    numbers=left,
    numbersep=2em,
    numberstyle=\footnotesize,
    frame=single,
    framesep=1em,
}
\lstset{style=simpleStyle}

\title{Lab Report Template}
\author{Author}
\date{\today}

\begin{document}

\maketitle

\section{Introduction}

xxxx.

\section{Method}

xxxx.

\section{Results}

xxxx.

\begin{table}[ht]
    \centering
    \caption{Error and Order Table}\label{tab:demo0}
    \begin{tabular}{c|ccccc}
        \hline
                           & 10       & 20        & 40        & 80         & 160        \\
        \hline
        $L^{\infty}$~error & 0.283284 & 0.0758226 & 0.0192964 & 0.00484029 & 0.00121093 \\
        order              & -        & 1.90      & 1.97      & 2.00       & 2.00       \\
        \hline
    \end{tabular}
\end{table}

\begin{figure}[htbp]
    \centering
    \includegraphics[width=.8\textwidth]{demo1.png}
    \caption{Figure}\label{fig:demo1}
\end{figure}

\begin{figure}[htbp]
    \centering
    \begin{subfigure}[b]{0.47\textwidth}
        \centering
        \includegraphics[width=\textwidth]{demo2-1.png}
        \caption{Subplot 1}
        \label{fig:demo2-a}
    \end{subfigure}
    \begin{subfigure}[b]{0.47\textwidth}
        \centering
        \includegraphics[width=\textwidth]{demo2-2.png}
        \caption{Subplot 2}
        \label{fig:demo2-b}
    \end{subfigure}
    \caption{Subplots}
    \label{fig:demo2}
\end{figure}

\section{Conclusion}

xxxx.

\section{Code Demo}

\begin{lstlisting}[style=simpleStyle, caption=Demo (C++), language=c++, label=lst:cpp]
#include <iostream>

int main(){
    std::cout << "Hello World!" << std::endl;
    return 0;
}
\end{lstlisting}

\lstinputlisting[style=simpleStyle, caption=Demo (Python), language=python, label=lst:python]{example.py}


\end{document}