下面我想引用最后一个数字。提前谢谢
\documentclass{article}
\usepackage{xcolor,graphicx,amssymb}
\usepackage[usestackEOL]{stackengine}
\newcommand{\repeatntimes}[2]{%
\newcount\i%
\i=0%
\newtoks\ans%
\loop%
\ans=\expandafter{\the\ans #2}%
\advance\i by 1%
\ifnum\i<#1\repeat%
\the\ans%
}
\newcommand{\countRepeatntimes}[2]{%
\newcount\i%
\i=0%
\newtoks\ans%
\loop%
\advance\i by 1%
\ans=\expandafter{\the\ans #2}%
\ifnum\i<#1\repeat%
\the\ans%
}
\newcommand\numberbox[1]{\colorbox{black!50}{\makebox[1em]{\textcolor{white}{#1}}}}
\newcommand\letterbox[2][green!10]{\fcolorbox{blue}{#1}{\makebox[1.2em]{#2}}}
\newcounter{problem}
\newcounter{choice}
\newcommand{\generateQs}[2][0]{%
\countRepeatntimes{#2}{\stepcounter{problem}\savestack{\Prob}{%
\numberbox{\theproblem}}%
\setcounter{choice}{0}%
\repeatntimes{\numexpr\NumberOfChoices-1}{\stepcounter{choice}%
\if\Alph{choice}#1\relax%
\savestack{\Prob}{\stackunder{\Prob}{\letterbox[red!10]{\Alph{choice}}}}%
\else%
\savestack{\Prob}{\stackunder{\Prob}{\letterbox{\Alph{choice}}}}%
\fi%
}\Prob\kern7pt%
}%
}
\def\NumberOfChoices{4}
\newcommand\answergrid[2]{\renewcommand\NumberOfChoices{#1}\makegrid #2;\relax\relax}
\def\makegrid#1#2#3\relax{%
\generateQs[#1]{1}\ifx\relax#3\else\makegrid#3\relax\fi%
}
\begin{document}
The exam contains (ref the last number) MCQs
\answergrid{5}{B;0;0;A;C;0;0;0;0;0;D;0;B;E}
\end{document}
答案1
类似地，LastPage你可以在文档的序言中添加
\makeatletter
\def\lastproblem@putlabel{%
\immediate\write\@auxout{%
\string\newlabel{LastProblem}{{\@arabic\c@problem}{}{}{}{}}}}
\AtEndDocument{\lastproblem@putlabel}
\makeatother
进而
...
The exam contains \ref{LastProblem} problems.
...
在文档正文中。