为了 MWE 的目的，我将问题简化为基本上显示水果店中的水果数量前水果被计数了。我知道 totcount 包，这是我使用它的尝试。我有一种感觉，由于计数器是通过水果店编号进行索引的，因此在其实现中会出现一些问题。
事实上，如果我声明
\newtotcounter{fruitcounter1}
\newtotcounter{fruitcounter2}
而不是
\newtotcounter{fruitcounter\thefruitshop}
但目标是让水果店对柜台进行索引（假设我们不知道要访问多少家水果店）。
我知道考试课上有类似的应用，但通过 \fruits{x} 函数计算水果数量的能力对我的应用来说非常重要。理想情况下，主文档中的代码不能可以改变。有人有计算水果数量的解决方案吗？我的代码如下所示。
\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{totcount}
\newcounter{fruitshop}
\setcounter{fruitshop}{1}
\newcommand{\visit}{
\vspace{0.5cm}
\newtotcounter{fruitcounter\thefruitshop}
\textbf{Fruit Shop Number \arabic{fruitshop}} that contains \total{fruitcounter\thefruitshop} fruits):
\renewcommand{\fruits}[1]{
#1\addtocounter{fruitcounter\thefruitshop}{#1}
}
}
\newcommand{\leave}{
\vspace{0.5cm}
We saw a total of \arabic{fruitcounter\thefruitshop} fruits! Would have been nice to see that number before entering the shop...
\stepcounter{fruitshop}
}
\title{Fruit Counter}
\begin{document}
\visit
There are \fruits{6} berries and \fruits{2} apples here.
\leave
\visit
Wow, there are \fruits{5} bananas here!
\leave
\end{document}
答案1
这主要问题与 的使用相关的\newtotcounter本质上是扩展。您需要\thefruitshop在将其传递给 之前进行扩展\newtotcounter。
有一些代码中的其他问题我也在此过程中修复了这个问题。
\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{totcount}
\newcounter{fruitshop}
\setcounter{fruitshop}{1}
\newcommand\fruits{}
\newcommand{\visit}{
\vspace{0.5cm}
\begingroup\edef\x{\endgroup\noexpand\newtotcounter{fruitcounter\thefruitshop}}\x
\textbf{Fruit Shop Number \arabic{fruitshop}} that contains \total{fruitcounter\thefruitshop} fruits):
\renewcommand{\fruits}[1]{
##1\addtocounter{fruitcounter\thefruitshop}{##1}
}
}
\newcommand{\leave}{
\vspace{0.5cm}
We saw a total of \arabic{fruitcounter\thefruitshop} fruits! Would have been nice to see that number before entering the shop...
\stepcounter{fruitshop}
}
\title{Fruit Counter}
\begin{document}
\visit
There are \fruits{6} berries and \fruits{2} apples here.
\leave
\visit
Wow, there are \fruits{5} bananas here!
\leave
\end{document}
答案2
修复错误后（#1应该是##1两次并且\fruits必须在序言中收到定义），.aux文件显示
\relax
\expandafter\ifx\csname c@fruitcounter3@totc\endcsname\relax\newcounter{fruitcounter3@totc}\fi\setcounter{fruitcounter3@totc}{0\c@fruitcounter3 }
\expandafter\ifx\csname c@fruitcounter3@totc\endcsname\relax\newcounter{fruitcounter3@totc}\fi\setcounter{fruitcounter3@totc}{0\c@fruitcounter3 }
所以你看到总计数器的名称乱了。你需要的是
\ExpandArgs{e}\newtotcounter{fruitcounter\thefruitshop}
因此\thefruitshop在定义时就已充分展开。参见https://tex.stackexchange.com/a/587615/4427对于类似的问题。
完整代码，包含其他一些修复，特别是计数器步进的时刻（以及结束线的格式化和保护）：
\documentclass[12pt]{article}
\usepackage{totcount}
\newcounter{fruitshop}
\newcommand{\fruits}[1]{%
#1\addtocounter{fruitcounter\thefruitshop}{#1}%
}
\newcommand{\visit}{%
\par\addvspace{0.5cm}%
\stepcounter{fruitshop}%
\ExpandArgs{e}\newtotcounter{fruitcounter\thefruitshop}%
\textbf{Fruit Shop Number \arabic{fruitshop}} (that contains
\total{fruitcounter\thefruitshop} fruits):
}
\newcommand{\leave}{%
\par\addvspace{0.5cm}
We saw a total of \arabic{fruitcounter\thefruitshop} fruits! Would have been
nice to see that number before entering the shop...\par
}
\title{Fruit Counter}
\begin{document}
\visit
There are \fruits{6} berries and \fruits{2} apples here.
\leave
\visit
Wow, there are \fruits{5} bananas here!
\leave
\end{document}