我想构建一个考试环境，允许在每场考试的末尾添加一定数量的空白页。每场考试由 a) 封面、b) 带有问题的主要页面和 c) 末尾的空白页组成（它们的数量作为考试环境的参数指定）。封面应显示考试的页数（包括末尾的空白页）。因此，我在每个考试环境的封面和末尾都贴上标签（差值加 1 就是页数）。只要每场考试末尾的空白页数为正数，这一切都可以正常工作（见下面的考试 1）。但是，如果我选择 0 个这样的页面（见下面的考试 2），则考试的页数为 0（尽管它应该至少为 0，包括封面和至少一页的考试问题）。为什么？
\documentclass{scrartcl}
\usepackage{calc}
\usepackage{refcount}
\newcommand\numberOfPages[1]{\edef\tmp{\number\numexpr\getpagerefnumber{end:page:#1}-\getpagerefnumber{start:page:#1}+1\relax}\tmp}% command for counting the number of pages of an exam
% Counters for the exam environment
\newcounter{examEnvCounter}% counts how often the environment 'exam' was called
\setcounter{examEnvCounter}{0}% initialize
\newcounter{numEmptyPages}% counter for the number of empty pages at the end of each exam
% Environment exam
\newenvironment{exam}[1]{% the argument is the number of empty pages at the end of the exam
% Counters
\setcounter{page}{1}% set page number to 1
\stepcounter{examEnvCounter}% increase counter which counts how many times the exam environment was called
% Cover/first page
\thispagestyle{empty}
\label{start:page:\number\value{examEnvCounter}}% define label for computing number or pages
{\bfseries Exam~\number\value{examEnvCounter}}
\par\bigskip
Number of pages this exam covers (including this cover page): \numberOfPages{\number\value{examEnvCounter}}
\clearpage
% Subsequent exam pages should show "Page ... of <number of pages>"
\renewcommand\pagemark{Page~\thepage~of~\numberOfPages{\number\value{examEnvCounter}}}
\setcounter{numEmptyPages}{#1}% number of empty pages at the end
}{% Inserting the provided number of empty pages
\ifnum\value{numEmptyPages} > 0% only enter the loop if we have at least one empty page
\loop
\clearpage% create empty page ...
Extra page at the end of this exam for scratch work, additional answers, etc. % ... with some text
\addtocounter{numEmptyPages}{-1}% decrease required (remaining) number of empty pages
\ifnum\value{numEmptyPages} > 0
\repeat
\fi% \ifnum
% Insert label at the end (to determine the number of pages of the exam)
\label{end:page:\number\value{examEnvCounter}}\clearpage
}
\begin{document}
% Exam 1
\begin{exam}{1}% first call (with one empty page at the end => fine!)
Some text as placeholder for an exam question.
\clearpage
\end{exam}
% Exam 2
\begin{exam}{0}% second call (with no empty pages at the end => doesn't determine the number of pages correctly)
Some text as placeholder for an exam question.
\clearpage
\end{exam}
\end{document}
答案1
由于您知道要发放的空白页数，因此您只需在考试文本末尾设置一个标签并添加空白页数即可。
\documentclass{scrartcl}
\usepackage{refcount}
\newcommand\numberOfPages[2]{%
\the\numexpr\getpagerefnumber{end:page:#1}+#2\relax
}
% Counters for the exam environment
\newcounter{examEnvCounter}% counts how often the environment 'exam' was called
\newcounter{numEmptyPages}% counter for the number of empty pages at the end of each exam
% Environment exam
\newenvironment{exam}[1]{% the argument is the number of empty pages at the end of the exam
\clearpage
% Counters
% set page number to 1
\setcounter{page}{1}%
% increase counter which counts how many times the exam environment was called
\stepcounter{examEnvCounter}
\setcounter{numEmptyPages}{#1}% number of empty pages at the end
%
% Cover/first page
\thispagestyle{empty}%
\noindent\textbf{Exam~\theexamEnvCounter}%
\par\bigskip
Number of pages this exam covers (including this cover page):
\numberOfPages{\theexamEnvCounter}{#1}%
\clearpage
% Subsequent exam pages should show "Page ... of <number of pages>"
\renewcommand\pagemark{Page~\thepage~of~\numberOfPages{\theexamEnvCounter}{#1}}%
}{%
% label
\label{end:page:\theexamEnvCounter}%
\clearpage
% Inserting the provided number of empty pages
\ifnum\value{numEmptyPages} > 0% only enter the loop if we have at least one empty page
\loop
Extra page at the end of this exam for scratch work, additional answers, etc.
\clearpage% create empty page ...
\addtocounter{numEmptyPages}{-1}% decrease required (remaining) number of empty pages
\ifnum\value{numEmptyPages} > 0
\repeat
\fi
}
\begin{document}
% Exam 1
\begin{exam}{1}
Some text as placeholder for an exam question.
\end{exam}
% Exam 2
\begin{exam}{0}
Some text as placeholder for an exam question.
\clearpage
This exam has two pages, but no additional blank page
\end{exam}
\end{document}
为了制作这张图片，我使用了 A6 纸。