![\@whilenum 的问题](https://linux22.com/image/458517/%5C%40whilenum%20%E7%9A%84%E9%97%AE%E9%A2%98%20.png)
You can't use `\spacefactor' in vertical mode.
我在使用\@whilenum
for 循环时遇到了错误。下面是一个不工作的小例子。为什么会出现这个错误?
\documentclass{article}
\usepackage[utf8]{inputenc}
\title{loop}\author{}
\begin{document}
\maketitle
\@whilenum\value{section}<6\do{\section{more}}
\end{document}
错误信息
You can't use `\spacefactor' in vertical mode. \@->\spacefactor \@m {} l.6 \@ whilenum\value{section}<6\do{\section{more}} Sorry, but I'm not programmed to handle this case; I'll just pretend that you didn't ask for it. If you're in the wrong mode, you might be able to return to the right one by typing `I}' or `I$' or `I\par'. ! Missing $ inserted. <inserted text> $ l.6 \@ whilenum\value{section}<6\do{\section{more}} I've inserted a begin-math/end-math symbol since I think you left one out. Proceed, with fingers crossed.
答案1
根据用户 Lupino 的评论,我提供了以下社区答案。请参阅\makeatletter 和 \makeatother 起什么作用?有关\makeatletter
和 的信息\makeatother
。
\documentclass{article}
\usepackage[utf8]{inputenc}
\title{loop}\author{}
\begin{document}
\maketitle
\makeatletter % <-- Added
\@whilenum\value{section}<6\do{\section{more}}
\makeatother % <-- Added
\end{document}