如何計算一章內的章節總數?

如何計算一章內的章節總數?

如何計算總節數之內每章?

我正在嘗試使用該totcount包,但它返回了該包的總節數最後的章節,而不是章節總數目前的章節。

在下面的 MWE 中,所需的行為是為第一章報告 3 個部分,為第二章和最後一章報告 1 個部分。

totcount僅報告 1 個部分(最後一章的計數器值)。

\documentclass[12pt]{book}

\usepackage{totcount}
\regtotcounter{section}

\begin{document}
\chapter*{First Chapter}

The total number of sections in this chapter should be 3.

The totcount package reports: \total{section}

\section{First Section}
First text

\section{Second Section}
Second text

\section{Third Section}
Third text

\chapter*{Last Chapter}

The total number of sections in this chapter should be 1.

The totcount package reports: \total{section}

\section{First and only section}
Section text

\end{document}

如何計算每一章內的章節總數?

注意:totcount如果使用 則報告 0 個部分\section*,請參閱 Sigur 的評論。

答案1

編輯提前了解每章章節編號的前瞻性版本位於本文的最後。它需要運行兩次編譯。

這個問題導致了一個新的軟體包cntperchap,自 2015 年 9 月 5 日起,該軟體包在 CTAN 上的版本 0.2 中可用

這使用了這個assoccnt包(我無意中很了解它的作者;-))

它將一個計數器totalsectionssection另一個計數器關聯起來-每次section計數器增加時,totalsections計數器也會步進。

但是,沒有自動重置\chapter*使用情況。在這種情況下,可以透過在\chapterusing \xpretocmdfrom xpatchpackage前面添加一些程式碼來自動完成

筆記作者assoccnt確實應該將其合併到他的包中;-)

\documentclass[12pt]{book}
\usepackage{assoccnt}

\usepackage{xpatch}
\newcounter{totalsections}[chapter] % Does not work with `chapter*`

% Automatically provide for resetting of the section counter each time 
%`\chapter` or `\chapter*` is used -- in this setup this is requested.
\xpretocmd{\chapter}{\setcounter{totalsections}{0}}{}{}


\DeclareAssociatedCounters{section}{totalsections}

\begin{document}
\chapter*{First Chapter}

The total number of sections in this chapter should be 3.



\section{First Section}
First text

\section{Second Section}
Second text

\section{Third Section}
Third text

There \number\value{totalsections} sections in this chapter

\chapter*{Last Chapter}


\section{First and only section}
Section text

There \number\value{totalsections} sections in this chapter


\end{document}

編輯某些新版本使用每章的節數(需要運行兩次才能成功)。

說明: 每次使用新章節時,會將累積的節數寫入外部文件,\jobname.seccnt簡稱foo.seccnt。在下一次 Latex 編譯運行時再次讀取該文件,並將值儲存到清單中etoolbox。巨集\GetTotalSectionCounter將在該列表中前進,直到到達正確的位置,然後列印出本章中的節數,甚至是前面的節數。 (宏應該是可擴展的,我覺得是這樣的)

foo.seccnt目前,如果章節數量發生更改,則需要手動刪除該檔案。

我會盡力克服這個缺點。

\documentclass{book}

\usepackage{ifthen}
\usepackage{assoccnt}

\usepackage{xpatch}

\usepackage{pgffor} % Only for quick usage of a lot of sections, demo only

\newwrite\seccountfile%

\newread\seccountinfile%

\listgadd{\seccountlist}{}% Initialize an empty list


\newcounter{currentchapter}
\newcounter{totalsections}
\newcounter{togglecounter}

\DeclareAssociatedCounters{section}{totalsections}


\newcommand{\getsectioncountnumbers}{%
  \setcounter{togglecounter}{0}%  
  \whiledo {\value{togglecounter} < 1}{%
    \read\seccountinfile to \gandalf%
    \ifeof\seccountinfile%
    \stepcounter{togglecounter}%
    \else%
    \listxadd{\seccountlist}{\gandalf}%
    \fi%
  }%
}


\xpretocmd{\chapter}{%
  \stepcounter{currentchapter}%
  \immediate\write\seccountfile{%
    \number\value{totalsections}%
  }%
  \setcounter{totalsections}{0}
}{}{}

\makeatletter
\newcounter{tempcount@a}
\newcommand{\@getsectiontotalcounter}[1]{%
  \setcounter{tempcount@a}{0}%
  \renewcommand*{\do}[1]{%
    \ifnumequal{\value{#1}}{\value{tempcount@a}}{%
      ##1\listbreak%
    }{%
      \stepcounter{tempcount@a}%
    }%  
  }%    
  \dolistloop{\seccountlist}%
}   


\newcommand{\GetSectionTotalCounter}[1][currentchapter]{%
  \ifdef{\seccountlist}{%
    \@getsectiontotalcounter{#1}%
    }{}%
}

\makeatother


\AtBeginDocument{%
  \IfFileExists{\jobname.seccnt}{%
    % Open for reading
    \immediate\openin\seccountinfile=\jobname.seccnt%
    \getsectioncountnumbers%
  }{%
    % Open for writing
    \immediate\openout\seccountfile=\jobname.seccnt%
  }%
}



\AtEndDocument{% 
  \immediate\write\seccountfile{%
    \number\value{totalsections}%
  }%
  \immediate\closeout\seccountfile%
}




\begin{document}

\chapter*{First}
This chapter will have \GetSectionTotalCounter sections
\section{First}
\section{Second}

\chapter*{Second}
This chapter will have \GetSectionTotalCounter sections
\section{First}
\section{Second}
\section{Third}
\section{Fourth}


% Now a really large chapter
\chapter*{Third}
This chapter will have \GetSectionTotalCounter sections

\foreach \x in {1,...,100} {%
\section{\x}
}

\end{document}

編輯foo.seccnt這是沒有明確刪除檔案的版本

我使用該addtocontents方法將LaTeX節號寫入一個單獨的文件,就像處理toc相關內容一樣。然後將其foo.seccnt視為偽造的目錄,在運行中重寫之前讀入(以及臨時儲存的值)。

\documentclass{book}

\usepackage{ifthen}
\usepackage{assoccnt}
\usepackage{xpatch}
\usepackage{pgffor}

\listgadd{\seccountlist}{}% Initialize an empty list

\newcounter{currentchapter}
\newcounter{totalsections}
\newcounter{togglecounter}

\DeclareAssociatedCounters{section}{totalsections}


\makeatletter
\newcommand{\getsectioncountnumbers}{%
  \setcounter{togglecounter}{0}%  
  \whiledo {\value{togglecounter} < 1}{%
    \read\tf@seccnt to \seccountnumberfromfile%
    \ifeof\tf@seccnt
    \stepcounter{togglecounter}%
    \else%
    \listxadd{\seccountlist}{\seccountnumberfromfile}%
    \fi%
  }%
}


\xpretocmd{\chapter}{%
  \stepcounter{currentchapter}%
  \addtocontents{seccnt}{%
    \number\value{totalsections}%
  }%
  \setcounter{totalsections}{0}
}{}{}

\newcounter{tempcount@a}
\newcommand{\@getsectiontotalcounter}[1]{%
  \setcounter{tempcount@a}{0}%
  \renewcommand*{\do}[1]{%
    \ifnumequal{\value{#1}}{\value{tempcount@a}}{%
      ##1\listbreak%
    }{%
      \stepcounter{tempcount@a}%
    }%  
  }%    
  \dolistloop{\seccountlist}%
}   

\newcommand{\GetSectionTotalCounter}[1][currentchapter]{%
  \ifdef{\seccountlist}{%
    \@getsectiontotalcounter{#1}%
  }{}%
}

% This is a modified version from \@starttoc, being defined latex.ltx
\def\@startfaketoc#1{%
  \begingroup
  % Generate the file handle first
  \expandafter\newwrite\csname tf@#1\endcsname%
  \makeatletter
  % Read first before deleting it
  \ifcsdef{tf@#1}{%
    \IfFileExists{\jobname.#1}{%
    \immediate\openin\csname tf@#1\endcsname \jobname.#1\relax
    \getsectioncountnumbers%
    }{}
  }{%
    \typeout{No section count numbers so far}
  }%
  \if@filesw
  % Write only if not `\nofiles` is specified
  \immediate\openout \csname tf@#1\endcsname \jobname.#1\relax
  \fi
  \@nobreakfalse
  \endgroup%
}


\AtBeginDocument{%
  \@startfaketoc{seccnt}
}



\AtEndDocument{%
  % Write the last section count to the file
  \addtocontents{seccnt}{%
    \number\value{totalsections}%
  }%
}
\makeatother




\begin{document}
\tableofcontents

\chapter*{First}
This chapter will have \GetSectionTotalCounter sections
\section{First}
\section{Second}

\chapter*{Second}
This chapter will have \GetSectionTotalCounter sections
\section{First}
\section{Second}
\section{Third}
\section{Fourth}



% Now a really large chapter
\chapter*{Third}
This chapter will have \GetSectionTotalCounter sections

\foreach \x in {1,...,100} {%
\section{\x}
}

\chapter{Fourth}
This chapter will have \GetSectionTotalCounter sections

\section{A single section}


\end{document}

編輯OP gsl 指出此程式碼中存在一些錯誤。我可以追蹤到這樣一個事實:在第一次運行中已經\@startfaketoc嘗試讀取外部檔案。foo.seccnt這當然會失敗,因為如果刪除該文件或第一次編譯文檔,則不存在這樣的文件。

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