以 MWE 身份重新发布，希望内容足够简洁。如果有不相关的内容，请见谅。
我在即将结束之前的最后一个“}”上收到此错误：
! Missing \endcsname inserted.
<to be read again>
\c@questions
l.26 }
The control sequence marked <to be read again> should
not appear between \csname and \endcsname.
这是文件：
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{totcount}
\usepackage{pgffor}
\begin{document}
\makeatletter
\newcommand\setq[3]{%
\global\@namedef{qa:#1.#2}{#3}%
}
\makeatother
\newtotcounter{questions}
\newcommand\newq[4]{%
\setq{\value{questions}}{Number}{\value{questions}}
\setq{\value{questions}}{Date}{#1}
\setq{\value{questions}}{Time}{#2}
\setq{\value{questions}}{Question}{#3}
\setq{\value{questions}}{Answer}{#4}
\stepcounter{questions}
}
\newq{268}%
{10:25}%
{Can you create a latex project with multiple documents?}%
{Yes, at least you can in Overleaf. You click on the menu in the top-left, and change main document to the tex file you want to compile.%
}
\end{document}
如果有任何变化，我会使用 overleaf。如果能对与错误无关的代码进行任何优化，我也将不胜感激。谢谢。
编辑：将值更改为阿拉伯语，这样就消除了 endcsname 错误，但现在我遇到了一般的编译错误。
答案1
而 -counter 的值questions是0序列\setq{\arabic{questions}}{Number}{\arabic{questions}}，定义控制字标记\qa:0.Number以传递标记序列\arabic{questions}。该标记序列反过来将不是在定义时执行/扩展，而是在使用/扩展控制字之后立即执行/扩展\qa:0.Number，产生 -counter 的值，question不是在定义时，而是在使用/扩展控制字时\qa:0.Number。您可能希望在定义时扩展
序列。\arabic{questions}\qa:0.Number
\arabic{questions}我使用而不是，\number\value{questions}因为使用后者您只需要一个\expandafter-chain 来触发扩展直到获得值，而使用进一步的扩展您需要四个\expandafter-chains：
\arabic=macro:
#1->\expandafter \@arabic \csname c@#1\endcsname .
l.16 \show\arabic
? i
insert> \show\@arabic
> \@arabic=macro:
#1->\number #1.
<insert> \makeatletter\show\@arabic
l.16 \show\arabic
从\expandafter获得第一个-chain 。\expandafter\@arabic\csname c@questions\endcsname\arabic{questions}
从中\expandafter获得的第二个链。\@arabic\c@questions\expandafter\@arabic\csname c@questions\endcsname
从中\expandafter获得的第三个链。\number\c@questions\@arabic\c@questions
第四个-链从中获取表示-寄存器\expandafter的值的十进制数字序列。\count\c@questions\number\c@questions
在我的系统上，以下 MWE 编译时没有错误：
\documentclass{article}
% \usepackage[utf8]{inputenc}
\usepackage{totcount}
% \usepackage{pgffor}
\newcommand\PassFirstToSecond[2]{#2{#1}}
\newcommand\setq[3]{%
\global\csname @namedef\endcsname{qa:#1.#2}{#3}%
}
\newtotcounter{questions}
\newcommand\newq[4]{%
\expandafter\PassFirstToSecond\expandafter{\number\value{questions}}{\setq{\arabic{questions}}{Number}}%
\setq{\arabic{questions}}{Date}{#1}%
\setq{\arabic{questions}}{Time}{#2}%
\setq{\arabic{questions}}{Question}{#3}%
\setq{\arabic{questions}}{Answer}{#4}%
\stepcounter{questions}%
}
\newq{268}%
{10:25}%
{Can you create a latex project with multiple documents?}%
{Yes, at least you can in Overleaf. You click on the menu in the top-left, and change main document to the tex file you want to compile.%
}
\begin{document}
\par\noindent
\csname qa:0.Number\endcsname\\
\csname qa:0.Date\endcsname\\
\csname qa:0.Time\endcsname\\
\csname qa:0.Question\endcsname\\
\csname qa:0.Answer\endcsname
\end{document}
您可能对 -macro 感兴趣\name。我\name在主题中详细阐述了 -macro“定义一个控制序列，之后有一个空格”该活动于 2016 年 11 月 10 日在 TeX - LaTeX StackExchange 上启动：
\documentclass{article}
% \usepackage[utf8]{inputenc}
\usepackage{totcount}
% \usepackage{pgffor}
\makeatletter
\newcommand\MyMacroNamePrefix@Exchange[2]{#2#1}%
\@ifdefinable\name{%
\long\def\name#1#{\romannumeral0\MyMacroNamePrefix@innername{#1}}%
}%
\newcommand\MyMacroNamePrefix@innername[2]{%
\expandafter\MyMacroNamePrefix@Exchange\expandafter{\csname#2\endcsname}{ #1}%
}%
\makeatother
\newtotcounter{questions}
\newcommand\newq[4]{%
\name\name{@ifdefinable}{qa:\arabic{questions}.Number}{%
\name\edef{qa:\arabic{questions}.Number}{\arabic{questions}}%
}%
\name\newcommand*{qa:\arabic{questions}.Date}{#1}%
\name\newcommand*{qa:\arabic{questions}.Time}{#2}%
\name\newcommand*{qa:\arabic{questions}.Question}{#3}%
\name\newcommand*{qa:\arabic{questions}.Answer}{#4}%
\stepcounter{questions}%
}%
\newq{268}%
{10:25}%
{Can you create a latex project with multiple documents?}%
{Yes, at least you can in Overleaf. You click on the menu in the top-left, and change main document to the tex file you want to compile.%
}
\begin{document}
\par\noindent
\name{qa:0.Number}\\
\name{qa:0.Date}\\
\name{qa:0.Time}\\
\name{qa:0.Question}\\
\name{qa:0.Answer}
\end{document}