我正在尝试在 LaTeX 文件中编写算法，但无法正确缩进。
在下面的图片网址中
此处 While 循环没有缩进，与 if-else 相同。如有任何帮助，我们将不胜感激。
\documentclass[fleqn,10pt,lineno]{wlpeerj}
\usepackage{listings}
\lstset{basicstyle=\ttfamily, breaklines}
\begin{document}
\subsection*{Figures and Tables}
\noexpand{
\begin{algorithm}[ht]
\KwResult{Write here the result }
initialization\;
\While{While condition}{
instructions\;
\eIf{condition}{
instructions1\;
instructions2\;
}{
instructions3\;
}
}
\caption{How to write algorithms}
\end{algorithm}
}
\end{document}
wlpeerj的文档类如下
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{wlpeerj}[18/08/2016, v1.2]
\RequirePackage[utf8]{inputenc}
\RequirePackage[english]{babel}
\RequirePackage[ruled,vlined]{algorithm2e}
\RequirePackage{ifthen}
\RequirePackage{calc}
\AtEndOfClass{\RequirePackage{microtype}}
\newif\if@peerjlineno
\DeclareOption{lineno}{\@peerjlinenotrue}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
\ProcessOptions*
\LoadClass{article}
\RequirePackage{times} % Loads the Times-Roman Fonts
\RequirePackage{mathptmx} % Loads the Times-Roman Math Fonts
\RequirePackage{lineno} % For numbering the lines if lineno option is given
\if@peerjlineno\linenumbers\fi
\RequirePackage{ifpdf}
\RequirePackage{amsmath,amsfonts,amssymb}
\RequirePackage{graphicx,xcolor}
\RequirePackage{booktabs}
\RequirePackage{authblk}
\RequirePackage[left=5cm,%
right=2cm,%
top=2.25cm,%
bottom=2.25cm,%
headheight=12pt,%
letterpaper]{geometry}%
\RequirePackage[labelfont={bf,sf},%
labelsep=period,%
justification=raggedright]{caption}
\RequirePackage{natbib}
\bibliographystyle{apalike}
%
% writeLaTeX logo
%
\newcommand\wllogo{%
\renewcommand*\rmdefault{ugq}\normalfont\upshape{}write%
\renewcommand*\rmdefault{cmr}\normalfont\upshape{\bf\LaTeX}}
%
% headers and footers
%
\RequirePackage{fancyhdr} % custom headers/footers
\RequirePackage{lastpage} % Number of pages in the document
\pagestyle{fancy} % Enables the custom headers/footers
% Headers
\lhead{}%
\chead{}%
\rhead{}%
% Footers
\lfoot{}%
\cfoot{}%
\rfoot{\small\sffamily\bfseries\thepage/\pageref{LastPage}}%
\renewcommand{\headrulewidth}{0pt}% % No header rule
\renewcommand{\footrulewidth}{0pt}% % No footer rule
%
% section/subsection/paragraph set-up
%
\RequirePackage[explicit]{titlesec}
\titleformat{\section}
{\color{color1}\large\sffamily\bfseries}
{\thesection}
{0.5em}
{\MakeUppercase{#1}}
[]
\titleformat{name=\section,numberless}
{\color{color1}\large\sffamily\bfseries}
{}
{0em}
{\MakeUppercase{#1}}
[]
\titleformat{\subsection}
{\sffamily\bfseries}
{\thesubsection}
{0.5em}
{#1}
[]
\titleformat{\subsubsection}
{\sffamily\small\bfseries\itshape}
{\thesubsubsection}
{0.5em}
{#1}
[]
\titleformat{\paragraph}[runin]
{\sffamily\small\bfseries}
{}
{0em}
{#1}
\titlespacing*{\section}{0pc}{3ex \@plus4pt \@minus3pt}{5pt}
\titlespacing*{\subsection}{0pc}{2.5ex \@plus3pt \@minus2pt}{0pt}
\titlespacing*{\subsubsection}{0pc}{2ex \@plus2.5pt \@minus1.5pt}{0pt}
\titlespacing*{\paragraph}{0pc}{1.5ex \@plus2pt \@minus1pt}{10pt}
%
% tableofcontents set-up
%
\usepackage{titletoc}
\contentsmargin{0cm}
\titlecontents{section}[\tocsep]
{\addvspace{4pt}\small\bfseries\sffamily}
{\contentslabel[\thecontentslabel]{\tocsep}}
{}
{\hfill\thecontentspage}
[]
\titlecontents{subsection}[\tocsep]
{\addvspace{2pt}\small\sffamily}
{\contentslabel[\thecontentslabel]{\tocsep}}
{}
{\ \titlerule*[.5pc]{.}\ \thecontentspage}
[]
\titlecontents*{subsubsection}[\tocsep]
{\footnotesize\sffamily}
{}
{}
{}
[\ \textbullet\ ]
\RequirePackage{enumitem}
%\setlist{nolistsep} % Uncomment to remove spacing between items in lists (enumerate, itemize)
% Remove brackets from numbering in List of References
\renewcommand{\@biblabel}[1]{\bfseries\color{color1}\textsuperscript{[#1]}}
%
% article meta data
%% LLT 18 Aug 2016: no more!
% \newcommand{\keywords}[1]{\def\@keywords{#1}}
%% LLT 18 Aug 2016: but need corresponding author
\newcommand{\corrauthor}[3][]{%
\def\thecorrauthor{%
Corresponding author:\par #2$^{#1}$\par
\medskip
Email address: #3\par}
}
\def\xabstract{abstract}
\long\def\abstract#1\end#2{\def\two{#2}\ifx\two\xabstract
\long\gdef\theabstract{\ignorespaces#1}
\def\go{\end{abstract}}\else
\typeout{^^J^^J PLEASE DO NOT USE ANY \string\begin\space \string\end^^J
COMMANDS WITHIN ABSTRACT^^J^^J}#1\end{#2}
\gdef\theabstract{\vskip12pt BADLY FORMED ABSTRACT: PLEASE DO
NOT USE {\tt\string\begin...\string\end} COMMANDS WITHIN
THE ABSTRACT\vskip12pt}\let\go\relax\fi
\go}
%
% custom title page
%
\renewcommand{\@maketitle}{%
{%
\thispagestyle{empty}%
\vskip-36pt%
{\raggedright\sffamily\bfseries\fontsize{20}{25}\selectfont \@title\par}%
\vskip10pt
{\raggedright\sffamily\fontsize{12}{16}\selectfont \@author\par}
\vskip1em%
% LLT 18 Aug 2016: needs corresponding author now
\ifdefined\thecorrauthor
{\raggedright\sffamily\thecorrauthor\par}
\fi
\vskip18pt
{%
\noindent
{\parbox{\dimexpr\linewidth-2\fboxsep\relax}{\color{color1}\large\sffamily\textbf{ABSTRACT}}}
}%
\vskip10pt\nolinenumbers
{%
\noindent
\colorbox{color2}{%
\parbox{\dimexpr\linewidth-2\fboxsep\relax}{%
\sffamily\small\vskip1ex\if@peerjlineno\internallinenumbers\fi\theabstract
}%
}%
%% LLT 18 Aug 2016: no more keywords
% \vskip18pt%
% \noindent
% \parbox{\dimexpr\linewidth-2\fboxsep\relax}{%
% \if@peerjlineno\internallinenumbers\fi%
% {\color{color1}\keywordname\hspace*{1em}} \@keywords%
% }%
}%
\vskip25pt%
}%
}%
%-----------------------------------------------
\setlength{\columnsep}{0.55cm} % Distance between the two columns of text
\setlength{\fboxrule}{0.75pt} % Width of the border around the abstract
\definecolor{color1}{RGB}{0,0,0} % Color of section headings
\definecolor{color2}{RGB}{250,232,207} % Color of the box behind the abstract
\newcommand{\keywordname}{Keywords:} % Defines the keywords heading name
\renewcommand\Authfont{\fontsize{12}{14}\usefont{OT1}{phv}{b}{n}}
\renewcommand\Affilfont{\fontsize{10}{12}\usefont{OT1}{phv}{b}{n}}
\newlength{\tocsep}
\setlength\tocsep{1.5pc} % Sets the indentation of the sections in the table of contents
\setcounter{tocdepth}{3} % Show only three levels in the table of contents section: sections, subsections and subsubsections
\usepackage{lipsum} % Required to insert dummy text
%-----------------------------------------------
\let\oldbibliography\thebibliography
\renewcommand{\thebibliography}[1]{%
\addcontentsline{toc}{section}{\hspace*{-\tocsep}\refname}%
\oldbibliography{#1}%
\setlength\itemsep{0pt}%
}
下面添加了相应的 overleaf 文件背页文件
答案1
显然，编写该课程的人从未对其进行彻底的测试。
错误在于该类\RequirePackage在加载基article类之前调用了一些。现在，虽然在某些情况下包必须在课程之前加载（例如fix-cm）这既不是一个一般规则，也不是一个普遍的好主意。
具体来说，该类包含
\RequirePackage[ruled,vlined]{algorithm2e}
% ... other stuff ...
\LoadClass{article}
该包algorithm2e通过其宏设置算法中的缩进\SetInd，该宏被立即调用为
\SetInd{0.5em}{1em}
麻烦的是，在加载article类之前执行此操作意味着当前字体为\nullfont，并且em长度单位为零。
一个快速的解决方法是添加\SetInd{0.5em}{1em}后\documentclass
\documentclass[fleqn,10pt,lineno]{wlpeerj}
\SetInd{0.5em}{1em}
但该课程的作者确实应该改进代码。