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```tex
\documentclass[8pt]{extarticle}
\usepackage[UTF8]{ctex}
\usepackage[paperwidth=21cm,paperheight=29.7cm,top=2.4cm,bottom=2.4cm,right=0.78cm,left=1.78cm]{geometry}
\usepackage{fancyhdr}
\usepackage{tikz}
\setlength{\linewidth}{18.44cm}
\makeatletter
\newlength{\blk@height}
\newlength{\blk@width}
\newlength{\blk@cell@ht}
\newlength{\blk@cell@dp}
\newlength{\blk@cell@total}
\newlength{\blk@cell@wd}
\setlength{\blk@height}{\dimexpr\pagegoal-\pagetotal\relax}
\setlength{\blk@width}{\linewidth}
\setlength{\blk@cell@ht}{26pt}
\setlength{\blk@cell@dp}{4pt}
\setlength{\blk@cell@total}{\dimexpr\blk@cell@ht + \blk@cell@dp\relax}
\setlength{\blk@cell@wd}{26pt}
%\pgfmathsetmacro{\rowCount}{floor(\blk@height / \blk@cell@total) - 1}
\newcommand{\drawBlocks}[1]{%
\def\rowCount{#1}%
\pgfmathsetmacro{\colCount}{floor(\blk@width / \blk@cell@wd)}%
\vspace{\dimexpr\blk@cell@dp-\lineskip\relax}
\foreach \y in {0, ..., \rowCount} {
\begin{tikzpicture}
\draw (0, \y * -\blk@cell@total) -- +(\blk@cell@wd * \colCount, 0)
++(0, -\blk@cell@ht) -- +(\blk@cell@wd * \colCount, 0);
\foreach \x in {0, ..., \colCount} {
\draw (\x * \blk@cell@wd, \y * -\blk@cell@total) -- +(0pt, -\blk@cell@ht);
}
\end{tikzpicture}
\vspace{\dimexpr\blk@cell@dp-\lineskip\relax}
}%
}
\makeatother
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}
\begin{document}
\noindent
12.写作表达\quad\\[0pt]从下面两题中任选一题，按要求完成任务。\quad\\[0pt]\indent \textbf{题一：开在心中的花朵}\quad\\[0pt]\indent \textbf{题二：我最想感谢的人}\quad\\[0pt]\indent 要求：\textcircled{1}不少于600字；\textcircled{2}书写工整，语句通顺，勿写错别字；\textcircled{3}有事例，有真情实感。\quad\\[0pt]
\quad\\[0pt]
\drawBlocks{40}
%\colCount
\end{document}
```
2 回答
1
\documentclass{extarticle} 文档类换成article就正常了，是文档类的问题吧
\documentclass{article}
0
把你的代码修改了。
```tex
\documentclass[8pt]{extarticle}
\usepackage[UTF8]{ctex}
\usepackage[paperwidth=21cm,paperheight=29.7cm,top=2.4cm,bottom=2.4cm,right=0.78cm,left=1.78cm]{geometry}
\usepackage{fancyhdr}
\usepackage{tikz}
\setlength{\linewidth}{18.44cm}
\makeatletter
\newlength{\blk@height}
\newlength{\blk@width}
\newlength{\blk@cell@ht}
\newlength{\blk@cell@wd}
\setlength{\blk@height}{\dimexpr\pagegoal-\pagetotal\relax}
\setlength{\blk@width}{\linewidth}
\setlength{\blk@cell@ht}{26pt}
\setlength{\blk@cell@wd}{26pt}
\newcommand{\drawBlocks}[1]{%
\def\rowCount{#1}%
\pgfmathsetmacro{\colCount}{floor(\blk@width / \blk@cell@wd)}%
\foreach \n in {1, ..., \rowCount} {%
\ifnum\n=\rowCount%
\def\aaaa{\relax}%
\else%
\def\aaaa{\\[4pt]}%
\fi%
\begin{tikzpicture}[line width=0.8pt]
\draw (0, 0) -- ++(\blk@cell@wd * \colCount, 0) --++(0, \blk@cell@ht)
-- ++(-\blk@cell@wd * \colCount, 0) -- cycle;
\foreach \x in {0, ..., \colCount}
{
\draw (\x * \blk@cell@wd, 0) -- +(0pt, \blk@cell@ht);
}
\end{tikzpicture}\aaaa
}%
}
\makeatother
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}
\begin{document}
\noindent
12.写作表达\quad\\[0pt]从下面两题中任选一题，按要求完成任务。\quad\\[0pt]\indent \textbf{题一：开在心中的花朵}\quad\\[0pt]\indent \textbf{题二：我最想感谢的人}\quad\\[0pt]\indent 要求：\textcircled{1}不少于600字；\textcircled{2}书写工整，语句通顺，勿写错别字；\textcircled{3}有事例，有真情实感。
\vspace{3mm}
\noindent
\drawBlocks{40}
\end{document}
```
我编译后没问题。
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